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The whole RDL range can be found here – New Zealand – Can be Found Here: Australia – Can be Found Here:
Radio Design Labs, Inc.®, abbreviated RDL®, is a manufacturer of electronic audio, video and control products headquartered in Prescott, Arizona, USA. Its products are distributed worldwide for use in commercial and residential audio and video installations and in broadcast and recording facilities. The company is known as the pioneer of application-specific electronic modules. The company produces modules in several trademarked product series including STICK-ON®, RACK-UP® and FLAT-PAK™.
About RDL®
RDL is the world’s premier manufacturer of high-quality audio, video and control modules. The concept of APPLICATION-SPECIFIC MODULES was first introduced by RDL more than twenty years ago…a concept promoting unsurpassed value and performance. A concept which has attained widespread popularity and is a proven success in many thousands of facilities around the world. As the inventor of APPLICATION-SPECIFIC MODULES, RDL continues to lead the industry with solutions to specific problems as well as building blocks of quality system designs. RDL is on the cutting edge in product performance, fully robotic high-volume manufacturing and technical applications advice from a dedicated customer service staff. RDL stands ready with the resources and the commitment to assist with any need, from the simplest solution to the most complex installation.

RDL Product by Series
AMS
AMS products are AV connectors, user interfaces and indicators that mount behind the front panel of industry products that provide D-style cutouts, including RDL Decora®-style wall plates and rackmounts. XLR connectors are constructed of metal. The front plate and bracket of other AMS accessories are constructed of black satin powder coated steel. A black plastic bezel is provided to finish the D-style cutout hole when the product is mounted. Wiring connections for all audio and control products are made using terminal blocks.
AMS products are ideal for use in a wide variety of A/V systems where professional quality connections, attractive aesthetics and ease of installation are required.
More AMS Products to Click Here

AMS-1/4F
1/4″ Headphone Jack – Fits all AMS mounts
Highlights
• Mounts in D-Style Standard Cutouts
• Mounts in all RDL AMS Mounting Frames
• Mounts in RDL Decora-Style Wall Plates
• Availability of a Wide Variety of Associated AMS Accessories
• Bezel Provides Professional Aesthetic Appearance
• Provides Flexibility for Connections and Controls

AMS-1/8F
Stereo Mini-Jack – Terminal block connections
Highlights
• Mounts in D-Style Standard Cutouts
• Mounts in all RDL AMS Mounting Frames
• Mounts in RDL Decora-Style Wall Plates
• Availability of a Wide Variety of Associated AMS Accessories
• Bezel Provides Professional Aesthetic Appearance
• Provides Flexibility for Connections and Controls

AMS-10K
10K Linear Taper Pot & Knob Assembly – Fits all AMS mounts
Highlights
• Mounts in D-Style Standard Cutouts
• Mounts in all RDL AMS Mounting Frames
• Mounts in RDL Decora-Style Wall Plates
• Availability of a Wide Variety of Associated AMS Accessories
• Bezel Provides Professional Aesthetic Appearance
• Provides Flexibility for Connections and Controls
AV-PAK
AV-PAK products are heavy duty modules intended for rugged field use. Functions include interface, isolation, ground-lift and signal dividing/combining. AV-PAKs are engineered to provide higher performance and better shielding than other industry products. Standard connector types are provided for direct connection and operation by end users. The heavy duty extruded aluminum and steel chassis are finished in a dark gray. Lettering is on a dark background with a protective polycarbonate overlay. The heavy chassis, dark color style and protected graphics make AV-PAKs ideal for both stage use and permanent installation. AV-PAK modules are designed and manufactured in the U.S.A.
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AV-AC2
Cable Kit for AV-HK1 – Dual RCA to Mini-Plug; Dual RCA to Mini-Jack
Highlights
• 1 each Dual Phono to Stereo Mini-plug; Length: 8 in. (20 cm) + connectors

AV-DC4
Line-Level Audio Divider/Combiner with Ground Lift
Highlights
• Combine Audio Signals to a Single Output
• Combine Stereo Line-Level Signals
• Feed a Mono Signal to Stereo Inputs
• Combine Multiple Lines to a Single Input
• Switch-Selectable Ground Isolation in Balanced Lines
• Line-Level Ground-Loop Elimination
• Balanced Mono Galvanic Isolation
• Signal Divider or Combiner in Rugged Field Case

AV-HK1
“Hum Killer” Audio Isolation Module
Highlights
• Ground Isolation in Unbalanced Line
• Ground-Loop Elimination
• Unbalanced Stereo Galvanic Isolation
• Isolation in Rugged Field Case
• Portable
• Equipped for Surface Mounting
D-SERIES
D Series products are user controls, indicators and connection plates that are compatible with Decora® style mounting. D Series modules and jacks connect directly to a variety of active RDL modules in multiple product series and are compatible with many OEM products. Products in this series may be active or passive. All D Series front panels are constructed of stainless or carbon steel for durability, shielding and static protection. Stainless steel models feature a brushed finish with direct lettering. Painted models are finished with a reverse-printed front-panel polycarbonate laminate which provides an attractive, durable finished appearance.
Connector plates offer pass-thru jacks or rear-panel solder terminals. Transformer-isolated connector modules are equipped with a shielded enclosure and a rear-panel terminal block.
Active models include remote controls to provide source selection, routing, level control, muting, source or level LED indication and more.
The depth of D Series products is sufficiently shallow to permit mounting not only in standard North American electrical boxes but also in RDL wall boxes designed to fit in narrow walls used in international installations. RDL also offers a variety of related accessories for wall mounting, surface mounting and desktop chassis mounting of D Series products, as well as matching metal trim plates.
Attractive styling, ease of installation, long-life pushbuttons, high quality connectors and worldwide mounting possibilities make D Series products a preferred long-term resource for system design solutions. D-SERIES modules are designed and manufactured in the U.S.A.
More D-SERIES Products to Click Here

D-1/4F
1/4″ Phone Jack on Decora® Wall Plate
Highlights
• All-Steel Construction
• Compatible with Decora®-Style Mounting Accessories
• Rear Panel Connections on Detachable Terminal Block
• Customizable Front-Panel Text

D-A2
Line Output Assembly
Highlights
• Wall Mounted Consumer Level Outputs
• Single or Dual Outputs from Mono Source
• Gold Plated Phono Jack Outputs
• Transformer Isolation of the Line Outputs
• Unbalanced Audio Outputs from a Balanced Line Input
• High Attenuation of Reverse Signals

D-AVM4
Audio and Video Monitor Jack Panels
Highlights
• Stereo Audio Inputs to Stereo Audio Output
• Stereo Inputs on RCA Jacks and Stereo Mini-Jack
• Unbalanced Output on Detachable Terminal Block
• Video Monitor Pass-Through Panel Connector
• Available in RDL White/Gray
EZ SERIES
RDL EZ Series products provide the highest level of value to A/V professionals and A/V users who demand professional quality. Based on decades of industry-leading technology in professional A/V and installed sound and video, EZ products capitalize on RDL´s renowned automated manufacturing to yield unsurpassed value. EZ products are a step up from other industry manufacturers´ utility modules, and are a leap up from consumer-grade products.
The EZ series offers unparalleled flexibility. Each unit is fully labeled on the front and rear for use either as a finished product or as a utility module. Installation of multiple products is quick and easy using the comprehensive range of EZ rack mounts, chassis, bezels, drawers and accessories. High quality full-size switches, long life controls, quality connectors, solid-state audio and video switching, gold plating and superior engineering combine to make EZ the best value in the industry. EZ products are attractive, reliable, packed with features and are simple to install and operate. When long-term performance, quality and value matter, the choice is EZ.
EZ products are made in the USA by RDL, the inventor of application-specific modules bringing decades of experience as the world´s leading manufacturer of high-reliability performance products to the A/V industry. EZ SERIES modules are designed and manufactured in the U.S.A.
More EZ-SERIES Products to Click Here

EZ-ADA4X
Stereo Audio Distribution Amplifier – 1X4
Highlights
• One Stereo Input to Four Stereo Outputs
• Unbalanced Inputs on MINI or RCA Jacks
• Unbalanced Outputs on RCA Jacks
• Inputs and Outputs on Rear Panel
• Front-Panel LEVEL Control
• Dual-LED VU Meter for Each Channel
• Gold-Plated Connectors
• Front-Panel Stereo Audio Metering
• Knob for Easy Level Adjustment

EZ-AFC2X
Audio Format Converter – Stereo Balanced ↔ Unbalanced
Highlights
• Unbalanced to Balanced Audio Conversion
• Balanced to Unbalanced Audio Conversion
• Unbalanced RCA Connections on Front Panel
• Balanced XLR Connections on Rear Panel
• Front-Panel LEVEL Controls
• Gold-Plated Connectors
• Front-Panel Stereo Audio Metering
• Knob for Easy Level Adjustment
• Exceptional Headroom and Frequency Response
• Dual-LED VU Meter for Each Channel

EZ-CC6
Component Chassis for 6 Increments of 1/6 Rack Width
Highlights
• Mounts All EZ A/V Products
• Mounts EZ Storage Drawers
• Cover Lifts Off for Easy Product Mounting
• Integral Heavy-Duty Non-Skid Rubber Feet
FLAT-PAK™ SERIES
FLAT-PAK™ products are high performance application-specific A/V, recording and broadcast modules constructed in compact, low-profile, shielded heavy duty metal chassis’. Module functions include pre-amplification, format conversion, line driving, power amplification, mixing, distribution, equalization, level control and more. The unique FLAT-PAK™ case can be directly screwed or bolted to cabinets or shelves. Rack mounting accessories permit mounting single or multiple FLAT-PAKs to front or rear rails. Adjacent mounting of FLAT-PAK™ modules is facilitated by daisy-chaining multiple modules from a single power supply using included power interconnect cables.
FLAT-PAK™ modules provide the most common connections in professional installations, including gold-plated jacks, detachable and fixed terminal blocks. Bold, high contrast labeling facilitates connection and adjustment in confined or dark locations. LED metering and indicators shorten setup and adjustment time. Signal connectors and switches are very high quality. Circuits are designed for studio quality performance and are engineered for extended service life.
A FLAT-PAK™ module may be mounted right where its function is needed. Multiple FLAT-PAK™ and other RDL modules can be used together to form all or part of an A/V system that precisely matches users’ needs. The high performance of these modules and the continuity in product offering and support makes FLAT-PAK™ modules a preferred long-term resource for system design solutions. FLAT-PAK™ SERIES modules are designed and manufactured in the U.S.A.
More FLAT-PAK™ SERIES Products to Click Here

DRA-35F
Flat-Pak DIN Rail Adapter
Highlights
• Mounts One RDL FLAT-PAK™ Module to 35 mm DIN Rail
• Ideal for Mounting Multiple FLAT-PAK™ Modules with Daisy Chained Power
• Ideal for Use when Traditional Rack Mounting is Not Desired

FP-ALC1
Automatic Level Control – Mono – Terminal block
Highlights
• Consistent Levels from Variable Sources
• Split-Band AGC for Audio Transparency
• Self-Adjusting Attack and Release Times
• AGC with Simple Single-Control Setup
• Level Control Range > 20 dB
• Gated Control to Avoid Level Seeking
• Convenience of RDL® FLAT-PAKs™

FP-ALC2
Automatic Level Control – Stereo – RCA Jacks
Highlights
• Consistent Levels from Variable Sources
• Split-Band AGC for Audio Transparency
• Self-Adjusting Attack and Release Times
• AGC with Simple Single-Control Setup
• Level Control Range > 20 dB
• Gated Control to Avoid Level Seeking
• Convenience of RDL FLAT-PAKs
HALF RACK
RDL Half-Rack products are studio quality electronic equipment in durable metal enclosures ½ rack width, 1RU in height. This series includes both digital and analog products with front-panel user controls and indicators. Connectors are located on the rear panel. Chassis are finished in black powder coat. The front panels feature a full color reverse-printed polycarbonate laminate surrounded by raised end caps and the product label track. The distinctive appearance of the Half-Rack products complements rack mounting or standalone use.
Available RDL accessories permit one or two Half-Rack products to be mounted in 1 RU. Rack mounting is easy and takes only seconds. The product drops into the rack adapter, slides forward and is secured by tightening four screws. For standalone use, each product is supplied with rubber feet secured by screws.
Attractive styling, superior performance, high quality panel controls and connectors, and durable construction make RDL Half-Rack products a preferred long-term resource for system design solutions. HALF RACK SERIES modules are designed and manufactured in the U.S.A.
More HALF RACK Products to Click Here

HR-ADC1
Analog to Digital Audio Converter
Highlights
• Broadcast Quality Analog to Digital Audio Conversion
• Inputs: Balanced and Unbalanced Stereo Audio
• Output: AES/EBU, Coaxial S/PDIF, AES-3ID
• External Sync Inputs: AES/EBU, Coaxial S/PDIF, AES-3ID
• Adjustable Audio Input Gain Trim
• Peak or Average Ballistic Metering with Selectable 0 dB Reference
• Peak Metering with Selectable Hold or Peak Store Modes
• Operation Up to 24 bits, 192 kHz
• Selectable Internally Generated Sample Rate and Bit Depth
• Front-Panel External Sync Enable Selector and Indicator
• Sample Rate, Bit Depth, External Sync Lock Indicators
• Transformer Isolated AES/EBU Output

HR-DAC1
Digital to Analog Converter – 24 bit 192 kHz
Highlights
• Broadcast Quality Audio Digital to Analog Conversion
• Input: AES/EBU, Coaxial or Optical S/PDIF, AES-3ID
• Outputs: Balanced and Unbalanced Stereo Audio
• Adjustable Audio Output Gain Trim
• Dual-LED Audio Output Level VU Metering
• Operation Up to 24 bits, 192 kHz
• Exclusive Sure-Lok™ Auto-Recovery Sentinel
• Transformer Isolated AES/EBU Input
• Automatic Sample Rate Detection with Indicators
• Digital Signal Lock Indicator for Valid Inputs

HR-DDA4
Digital Audio Distributor – 1×4
Highlights
• 1 x 4 Digital Audio Distribution for All Formats
• Input: AES/EBU, Coaxial or Optical S/PDIF, AES-3ID
• Each Output: AES/EBU, S/PDIF or AES-3ID
• Format Conversion for Selected Output Format
• Operation Up to 24 bits, 192 kHz
• Exclusive Sure-Lok™ Auto-Recovery Sentinel
• Transformer Isolated AES/EBU Input and Outputs
• Digital Signal Reclocking
• Sample Rate Indicator
• Digital Signal Lock Indicator for Each Input Format
HD SERIES
HD Series products are constructed in durable metal enclosures ½ rack width, 2RU in height. This series features front-panel user controls and indicators. Connectors are located on the rear panel. Chassis are finished in black powder coat. The front panels feature a full color reverse-printed polycarbonate laminate surrounded by raised end caps. The distinctive appearance of the HD products complements rack mounting or standalone use.
The front panels feature bold graphics, simple indicators and large comfortable control knobs and buttons for ease of use by end users. HD products offer a broad range of features and external controls and module accessory connections on the rear panels.
Available RDL accessories permit one or two HD products to be mounted in 2 RU. Rack mounting is easy and takes only seconds. The HD product drops into the rack adapter, slides forward and is secured by tightening four screws. For standalone use, each product is supplied with rubber feet secured by screws. HD accessories permit a variety of mounting options to conceal wiring for a professional finished appearance.
Attractive styling, intuitive end-user operation, high quality panel controls and connectors, and durable construction make RDL HD products a preferred long-term resource for system design solutions.
More HD SERIES Products to Click Here

HD-ASC1
Amplifier Security Cover
Highlights
• Mounts to an HD Series Mixer / Amplifier
• Prevents Tampering with User Level Controls
• Access to Power Button and Associated LED Indicators when Installed
• All-Steel Construction

HD-BP1
BACK-PACK Rear Cover
Highlights
• Mounts to an HD Series Mixer / Amplifier
• Holds RDL Desktop Power Supply
• Prevents Tampering with Rear Panel Connections
• All-Steel Construction

HD-FP1
Filler Panel
Highlights
• Fills an Unused Half of Rack Adapter
• May be Mounted In Front of an HD Series Product to Prevent User Adjustment or Tampering
• All-Steel Construction
RACK-UP® SERIES
RACK-UPs are the original 1/3 rack width 1RU rack-mountable modules for the A/V, recording and broadcast industries. Module functions include mixing, switching, pre-amplification, power amplification, distribution, gain control, equalization and more. Some RACK-UP® modules are constructed in solid encapsulated durable industrial black plastic enclosures; MAX RACK-UPs are assembled using heavy duty extruded aluminum and steel panels. The rear panels feature clear bold white lettering for the terminal blocks and connectors. Reverse-printed front-panel polycarbonate laminates provide an attractive, durable finished appearance for rack-mounted or free-standing use.
Since RDL first originated 1/3 rack width modules, RACK-UPs have led the industry in economical, high-performance and cost-effective long life solutions in system designs. Multiple RACK-UP modules may be interconnected, or may be connected with other RDL modules to form all or part of an A/V system. Certain RACK-UP modules are often used free standing; all RACK-UPs may be rack mounted. A complete range of mounting options is available for systems comprised of multiple modules.
RACK-UP® modules provide input, output and control connections through terminal blocks and connector (or both) according to common usage in professional installations. Front panels are equipped with connectors, user controls and LED metering, as appropriate.
Functions and features provided by RACK-UPs, since their introduction, are still available today. This continuity in product offering and support makes RACK-UP® modules a preferred long-term resource for system design solutions. RACK-UP® SERIES modules are designed and manufactured in the U.S.A.
More RACK-UP® SERIES Products to Click Here

ACM-3
Amplitude Component Monitor
Highlights
• Maintain Clarity
• Maximize Loudness
• Maximize Stereo Separation
• Reduce Subcarrier Crosstalk
• Assure Consistency of your Signal Coverage
• Maintain Positive Control of Multipath Artifacts
• Maximize Performance From Your FM Transmitter
• Mount using RU Series Mounting Options

DRA-35R
RACK-UP DIN Rail Adapter
Highlights
• Mounts One RDL RACK-UP® Module to 35 mm DIN Rail
• Allows Full Access to the Front and Rear Panels of the Mounted Module
• Ideal for Use when Traditional Rack Mounting is Not Desired

RU-ADA4D
Audio Distribution Amplifier
Highlights
• Stereo Audio Distribution with 4 Outputs
• Mono Audio Distribution with 8 Outputs
• Front-Panel Input Level Trimmers
• Dual-LED VU Meter for Each Input Channel
• Front-Panel Output Level Trimmers
• Inputs and Outputs on Rear Panel Detachable Terminal Blocks
• Exceptional Audio Quality for the Most Demanding Applications
RCX™
The RCX™ system is an engineered room combining system for facilities with multiple adjacent meeting rooms. The system offers unmatched flexibility, simplicity of installation and proven long-term reliability. RCX™ products are designed and manufactured in the U.S.A.
Each system requires a single rack-mounted RCX™ Controller plus an RCX™ Room Control for source selection and volume adjustment in each room. A maximum of two RCX™ Room Controls may be installed in each room. The system Controller configures the sources and amplifiers for each room, and it may be remote controlled using one or more customized RCX-CD1 Control/Display Panels.
RCX™ compatible microphone and line input connections, source selection and volume control in each room are available in wall mounted Decora® style plates. Volume control is possible at multiple control points using pushbutton or rotary encoder type controls. The system features a wide variety of programming functions including preset levels, muting and a range of remote control options.
More RCX™ Products to Click Here

D-RCX1
Room Control for RCX-5C Room Combiner
Highlights
• Mounts in individual room to control source and level
• Long life pushbuttons
• Music or Local / Combined source selection
• Up / Down pushbutton level adjustment with LED readout
• Multiple RCX 1s may be connected within one room
• Decora® design with all steel panel and rear enclosure

D-RCX2
Room Control for RCX-5C Room Combiner
Highlights
• Mounts in individual room to control source and level
• Long life pushbuttons for Music or Local / Combined Selection
• Optical rotary encoder with LED readout for setting audio level
• One or two RCX 2 units may be connected in the same room
• Decora® design with all steel panel and rear enclosure

DB-RCX1
Room Control for RCX-5C Room Combiner
Highlights
• Mounts in individual room to control source and level
• Long life pushbuttons
• Music or Local / Combined source selection
• Up / Down pushbutton level adjustment with LED readout
• Multiple RCX 1s may be connected within one room
• Decora® design with all steel panel and rear enclosure
SOURCEFLEX™
The SourceFlex™ Audio System is an integrated set of products used to configure cost-effective, expandable audio monitoring. SourceFlex gives users the option to select from up to 8 audio sources, adjust the volume, and listen with impeccable clarity. Source switching equipment is all electronic. Monitoring stations are ruggedly constructed, easily maintained, and cosmetically attractive.
Each system requires rack-mounted SourceFlex™ input and audio control chassis’, plus SourceFlex listening stations. Each station provides source selection and volume control at a user’s location. Styles of listening stations include wall mounted for overhead speakers, table mounted with internal speakers, handlebar or surface mounted for use with headphones, and more.
The SourceFlex™ system consists of switching equipment and options which may be added to in the future. The system is wired to avoid the problems associated with recharging and signal interference in wireless distribution. A SourceFlex system is simple to install and provides years of reliable service with expandability. SOURCEFLEX™ products are designed and manufactured in the U.S.A.
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D-SFRC8
Room Control for RCX-5C Room Combiner
Highlights
• Single Room Listening Station with In-Wall Controls
• Source Selection Pushbutton
• Volume Adjustment Using a Single-Turn Control
• Selection From up to 8 Audio Sources
• Line-Level Audio Output
• Line Output Switchable Fixed or Variable
• Variable Output Follows Front-Panel Level Control
• 3.5 Watt RMS Audio Amplifier into 8 Ohms, 6.5 Watts into 4 Ohms
• High-Efficiency Class D Operation
• Thermal and Short-Circuit Protection
• Speaker Output Connection on Detachable Terminal Block
• Mounts In Wall Using US Single Gang Electrical Box or RDL® WB-1U
• Compatible with Other RDL Wall Plates and Controls
• Ideal for Office Distributed Sound Systems with Music and Paging

D-SFRC8L
Audio Selector for SourceFlex Distributed Audio System
Highlights
• Single Room Listening Station with In-Wall Controls
• Source Selection Pushbutton
• Selection From up to 8 Audio Sources
• Line-Level Audio Output
• Mounts In Wall Using US Single Gang Electrical Box or RDL® WB-1U
• Compatible with Other RDL Wall Plates and Controls
• Ideal for Office Distributed Sound Systems with Music and Paging

DB-SFRC8
Room Control Station for SourceFlex Distributed Audio System
Highlights
• Single Room Listening Station with In-Wall Controls
• Source Selection Pushbutton
• Volume Adjustment Using a Single-Turn Control
• Selection From up to 8 Audio Sources
• Line-Level Audio Output
• Line Output Switchable Fixed or Variable
• Variable Output Follows Front-Panel Level Control
• 3.5 Watt RMS Audio Amplifier into 8 Ohms, 6.5 Watts into 4 Ohms
• High-Efficiency Class D Operation
• Thermal and Short-Circuit Protection
• Speaker Output Connection on Detachable Terminal Block
• Mounts In Wall Using US Single Gang Electrical Box or RDL® WB-1U
• Compatible with Other RDL Wall Plates and Controls
• Ideal for Office Distributed Sound Systems with Music and Paging
STICK-ON® SERIES
STICK-ONs are the original application-specific modules for the A/V, recording and broadcast industries. Module functions include signal detection, switching, pre-amplification, format conversion, line driving, power amplification, mixing, distribution, gain control, equalization, routing and more. Each STICK-ON® is an ultra-compact module engineered to provide higher performance and longer life than other industry products. STICK-ON modules are solid encapsulated hybrid circuits in durable industrial black plastic enclosures (1.55″, 3.94 cm x 3″, 7.62 cm x 0.65″, 1.65 cm) with clear bold white lettering for the terminal block connections, recessed trimming controls and switches.
Since RDL first originated application-specific modules, STICK-ONs have led the industry in economical, high-performance and cost-effective long life solutions in system designs. Multiple STICK-ON® modules can be interconnected to form all or part of an A/V system. A single STICK-ON® module may be mounted right where its function is needed, often to add an input, output, or gain adjustment to existing equipment. STICK-ON® modules allow customizing an A/V system to precisely match users’ needs. Adding STICK-ONs to an existing system can extend system life by adding updated features, resulting in considerable cost savings. A complete range of backboard and rack mounting options is available for systems comprised of multiple STICK-ON modules.
The technology used in STICK-ON® modules has been regularly updated over the years to insure industry-leading performance. Functions and features provided by STICK-ONs, since their introduction, are still available today. This continuity in product offering and support makes STICK-ON® modules the preferred long-term resource for system design solutions. STICK-ON® SERIES modules are designed and manufactured in the U.S.A.
More STICK-ON® SERIES Products to Click Here

DRA-35S
STICK-ON DIN Rail Adapter – 1 module
Highlights
• Mounts One RDL STICK-ON® Module to 35 mm DIN Rail
• Compact Design Permits Mounting Multiple Modules to a Single DIN Rail
• Ideal for Use when Traditional Rack Mounting is Not Desired

DRA-35S6
STICK-ON DIN Rail Adapter – 6 modules
Highlights
• Mounts Six RDL STICK-ON® Module to 35 mm DIN Rail
• Removable Shelves for Easy Installation and Module Adjustment
• Ideal for Use when Traditional Rack Mounting is Not Desired

MSR-1
Snap Rail Adapter – STICK-ON Series
Highlights
• Mounts One RDL STICK-ON® to a 3.2 Inch Snap Rail
• Provides Easy, Secure Mounting
• All-Steel Construction
SYSFLEX®
The SysFlex® series is a family of A/V modules providing complex interface solutions at the click of a connector. Certain SysFlex modules provide connectorized interface between data networks and analog and digital audio devices. Other SysFlex modules include networked and conventional amplifiers and other application-specific solutions. In RDL’s tradition of versatility, SysFlex modules can be used right where they are needed: Rack-mounted, Surface-mounted, or unmounted. They are light weight, compact and easy to install with simple, straightforward switch settings and LED indicators. Modules quickly snap into the SysFlex rack mount and each is firmly secured with a single screw. The racking system segregates network and power wiring from the audio and digital audio connectors. For connectorized network audio endpoints and A/V system components that provide unparalleled performance and advanced features without giving up simplicity and ease of installation, SysFlex is the industry’s best value.
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SF-BNC2
Bidirectional Unbalanced Stereo Audio Network Interface
Highlights
• Dante Network Interface for Two Audio Inputs and Two Audio Outputs
• Inputs and Outputs on Front-Panel RCA Jacks and Stereo 3.5 mm Mini-Jacks
• Selectable Dante Sample Rates: 44.1 kHz, 48 kHz, 88.2 kHz, 96 kHz
• Converts Two Unbalanced Line-Level Audio Sources to Dante Network Channels
• Converts Two Dante Network Audio Signals to Unbalanced Line Level
• Special Software Not Required for Module Setup
• Exceptional Low-Noise and Low-Distortion Performance
• High Resolution 24 Bit Digital to Analog Conversion
• Legendary RDL Analog Filtering Enhances Superb Audio Performance
• LED Indicator for Valid Power and Network Sync
• Operation from PoE Power (Class 0, IEEE 802.3af)
• Equipped for SysFlex® Rack Mounting or Surface Mounting

SF-DN4
Digital Audio to Network Interface
Highlights
• Converts Two Left/Right Digital Audio Sources to Four Dante Network Audio Signals
• AES/EBU or S/PDIF Coaxial or Optical Inputs
• Supports Input Sampling Rates from 32 kHz to 192 kHz
• Selectable Dante Sample Rates: 44.1 kHz, 48 kHz, 88.2 kHz, 96 kHz
• Digital Signal Lock Indicator for Valid Inputs
• Transformer-Isolated AES/EBU Input
• Digital Audio Sources Remain in the Digital Domain through the Dante Network Output
• Special Software Not Required for Module Setup
• LED Indicator for Valid Power and Network Sync
• Operation from PoE Power (Class 0, IEEE 802.3af)
• Equipped for SysFlex® Rack Mounting or Surface Mounting

SF-MA100A
Format-A to 100 W Mono Audio Mixer-Amplifier – 70 V or 100 V
Highlights
• 100 Watts RMS Constant Voltage Amplifier
• 70 V or 100 V Output
• Three Operating Modes
• Mode 1: 3-Input Mixer Amp with No Remote Control
• Mode 2: 3-Input Mixer Amp with VCA for Remote Level Control of Audio Output
• Mode 3: 3-Input Mixer Amp with VCA Remote Control of Each Mixer Input
• Mixes Audio Inputs from Format-A Pair A, Pair B and Pair C
• Format-A Signal and Power Pairs Pass Through to LOOP OUT Jack
• External Level Control Using RDL Type D*-RLC10KM (Mode 2) or D*-RC3 (Mode 3) Remote Controls with RJ45
• Special Software Not Required for Module Setup
• LED Indicators: Amplifier Output Level and Status, and Correct dc Voltage on Format-A Output
• High-Efficiency Class D Operation
• Thermal and Short-Circuit Protection
• Plenum Rated per UL 2043 Standard
TX™ SERIES
TX™ Series modules are application-specific modules for the A/V and related industries. Many TX™ modules offer galvanic transformer isolation. Module functions include signal detection, switching, amplification, format conversion, line driving, mixing, distribution, twisted-pair sending/receiving and more. Each TX™ is a compact module engineered to provide higher performance and longer life than other industry products. TX™ modules are solid encapsulated hybrid circuits in durable industrial black plastic/steel or aluminum enclosures with clear bold white lettering for the jacks, terminal block connections, trimming controls and switches.
TX™ modules are constructed in two widths and heights. All TXs are the same length, have the same mounting hole configuration, and are compatible with all TX™ series mounting options. A complete range of mounting options is available for systems utilizing multiple TX™ modules. A single TX™ module may be mounted right where its function is needed, and are widely used in system designs with OEM or other RDL products. TX SERIES modules are designed and manufactured in the U.S.A.
More SYSFLEX® Products to Click Here

DRA-35T
TX Series DIN Rail Adapter
Highlights
• Mounts One RDL TX™ Series ™ Module to 35 mm DIN Rail
• Compact Design Permits Mounting Multiple TX™ Series Modules to a Single DIN Rail
• Ideal for Use when Traditional Rack Mounting is Not Desired

TX-10B
Bridging Input Transformer
Highlights
• Used to add transformer isolation to any line-level RDL product input
• Frequency response: 20 Hz to 20 kHz (+/- 0.5 dB)
• THD: < 0.05% (1 kHz)
• 10 kΩ input bridges any audio line
• Balanced input and output
• Connections on Detachable Terminal Blocks

TX-1A
Balanced to Unbalanced Transformer – Adjustable
Highlights
• Provides transformer isolation between balanced line and unbalanced input
• Level trimpot adjusts output 4 to 24 dB below input level
• Input may be 10 kΩ bridging or 600 Ω terminated
• Frequency response 20 Hz to 20 kHz (+/- 0.5 dB)
• THD: < 0.05% (1 kHz)
Accessories
A wide variety of products designed for mounting and wiring RDL products
More Accessories Products to Click Here

ACB-1
Jack Box – Stereo Headphone
Highlights
• All-Steel Construction
• Single 1/4″ Headphone Jack
• Nylon Bushing for Cable Routing

ACB-2
Jack Box – Dual RCA jacks
Highlights
• All-Steel Construction
• Gold-Plated RCA Connectors
• Nylon Bushing for Cable Routing

CP-1
Single Cover Plate – White
Highlights
• All-Steel Construction
• Durable Powder Coated Finish
• Compatible with Decora®-Style Products
• Mounting Hardware Included
About RDL Modules
APPLICATION-SPECIFIC MODULES perform a particular electronic function or do a specific job. Audio and video functions are broken down so a module does one job. Certain modules mix, others preamplify or amplify, others detect, others control, and others distribute. A module is provided for each function and type of signal. APPLICATION-SPECIFIC MODULES give you two basic methods of use:
Do a single job:
- Balance an unbalanced audio line at its source
- Bridge a balanced audio line
- Distribute audio or video to several destinations
- Add more inputs to a mixer
- Remote control audio/video sources or audio level
- Add automatic gain control or compression where it is needed in a system
- Preamplify a microphone at the microphone location to drive line level
Build a complete system or system subassembly:
- Automatic mixing system
- Distributed audio throughout a facility
- Prioritized source selection for zone paging or room combining
- Any mixed and distributed system using audio/video detection and/or remote control
About RDL Advantages
The advantages of designing with RDL modules are versatility, performance and value.
Lower cost
- Buying a single preamp or small mixer often saves the cost of a larger mixer
- Connecting several specific modules doing the functions you need can take the place of larger, more expensive equipment
- Install exactly the functions you need without the added cost of functions you don’t need
High performance
- Installing a function where it is needed often improves system performance, such as installing a mic preamp near the microphone
- Small size circuits meticulously engineered for optimum performance produce lower noise
- Balanced differential lines between each system function (module) reduce interference and common mode noise
- Interconnection is maintained at industry standard professional audio and video levels
Versatility
- Modules can be mounted in the system right where their function is optimum
- RDL Rack-mount accessories are available for convenient module mounting in equipment racks RU-Series mounts 3-across in 1RU; Stick-On series mounts 12 across in 2RU
- There is a module for nearly every audio or video function in any small or large system!
The History of Radio Design Labs
Radio Design Labs, Inc.®, abbreviated RDL®, is a manufacturer of electronic audio, video and control products headquartered in Prescott, Arizona, USA. Its products are distributed worldwide for use in commercial and residential audio and video installations and in broadcast and recording facilities. The company is known as the pioneer of application-specific electronic modules. The company produces modules in trademarked product series including AV-PAK™, FLAT-PAK™, FORMAT-A™, RACK-UP®, STICK-ON®, SYSFLEX™ and TX™.
History
Radio Design Labs was established in January 1986 in Carpinteria, California, United States. The company name was chosen for its founders’ extensive engineering and sales experience in the broadcasting industry. The purpose of the business was to design and manufacture electronic modules and equipment for the broadcast, commercial sound, video, audio-visual and recording markets. The company set out to distinguish itself by three characteristics. First, all products would be designed and manufactured to exact standards of professional performance and longevity previously reserved for broadcast and recording equipment. Second, the core product groups would be comprised of single-function modules enabling many features to be added to audio and video system designs. Third, the company would offer a broad base of technical and system design support to its customers led by an engineering staff with field experience. These principles have guided the company throughout its history.
In September 1993, the company relocated its manufacturing division to Prescott, Arizona, United States. The sales offices remained in Carpinteria, California until December 2004 when all U.S. operations were consolidated to the factory campus in Arizona.
RDL-Europe, B.V. was established as a subsidiary company in Amsterdam, The Netherlands in 1998. RDL-Europe serves as the RDL master distributor, providing inventory, sales, and service for Europe (EEC) and surrounding regions.
In 2022, RDL was acquired by private equity group VOPNE Capital, allowing for additional investments in people, machinery, and equipment. As a result of this additional support, RDL celebrated its strongest year in history in 2023 by producing and shipping a record number of products.
Application-specific Modules
Audio and video systems in the years leading up to the founding of RDL were characterized by technical designs based on features available in commercial amplifiers and mixers. Examples include signal mixing, equalization, source selection and signal distribution. Available features often did not meet the optimal system design requirements, so system design flexibility was constrained by the functional limitations of the equipment used. RDL set about to change the way systems were designed through the use of single-function modules, also known as application-specific modules. Each module performs essentially a single function, such as mixing, equalization, source selection, signal routing, signal distribution, signal detection or remote control. The isolation of functions into single, low-cost high-reliability modules offered system designers complete flexibility to interconnect multiple modules in virtually unlimited combinations to create systems with previously unattainable features. This method of system design and installation was widely adopted within a few years of its introduction. RDL application-specific modules are used by nearly all system integrators in the United States and by progressive designers and installers worldwide.
Audio products comprise the greatest diversity of function, including Power Amplifiers, Transformers, Processing, Paging, Microphone products, Mixing, Line Amplifiers, Test Equipment, Interface products, Pre-amplifiers, EMC (electromagnetic compatibility) products, Program Monitoring, Distribution, Signal Generators, Meters, Speakers, Crossovers, Filters, Attenuators, Phono pre-amplifiers, VCAs (voltage controlled amplifiers) and products to provide local and/or remote Switching.
Certain functions offered in the Audio products group are applicable to other signal types. RDL Video products include Distribution, Attenuators, Line Amplifiers, Detectors, and a variety of related video switching modules.
STICK-ON Modules
The first application-specific module, called STP-1, was sold in 1987. Within weeks, several additional modules were added to the STICK-ON series. The line quickly grew to nearly 50 different products. STICK-ON modules are compact monolithic plastic modules interconnected through high quality terminal blocks. An installation may consist of a single module, or multiple modules may be mounted in various RDL racking adapters. The STICK-ON series quickly became popular because the modules are compact and lightweight enough to be mounted right where they are needed. Dual Lock reclosable mounting fasteners are included with each product.
Other Product Series
Shortly after the introduction of the STICK-ON series, RDL introduced the first products in the RACK-UP series. These modules provide many of the STICK-ON series features and functions in a larger mechanical format with connectors. RACK-UP modules are primarily intended for rack-mounted installation. FLAT-PAK modules specialize in features common to back-board mounted installations. Other series including TX and AV-PAK modules meet the needs of various installed and end-user applications. Many RDL modules may be remote controlled. The company produces remote control and connection panels that are compatible with standard North American and European electrical boxes.
Broadcast Products
The various series of RDL modular products provide the high reliability, longevity and flexibility suited to commercial audio/video, home audio/video, professional studio and broadcast users. RDL is also known for broadcast-specific products. The best known is the series of Amplitude Component Monitors. The ACM-1, ACM-2 and ACM-3 represent three generations of monitors that are used by FM radio stations to maximize their effective coverage areas, often extending the useful service areas by several miles. The first of these instruments, the ACM-1, was introduced in 1988.
Signal Distribution and Engineered Systems
Building on its reputation for quality modular system design components, RDL developed FORMAT-A, a pre-engineered audio system and modular audio and video signal distribution using Cat-5 or better twisted-pair cabling.
RCX™ Room Combining Systems are widely used to automatically control audio mixing and routing for hotel meeting rooms. SOURCEFLEX™ system products are used in a variety of facilities to distribute and select multiple audio channels.
Manufacturing
RDL manufacturing is characterized by broad vertical integration. Fabrication and assembly processes are maintained in-house, including plastics molding and encapsulation, metal fabrication, forming and powder-coating, product printing, panel laminate manufacturing and precision laser cutting. Assembly, including component placement, soldering and product testing is automated using computerized machine control. All RDL products, except power supplies, are made in the United States, are CE and RoHS compliant and carry a three-year warranty. Manufacturing and packaging employ environmentally safe, recyclable materials and processes. RDL accepts end-of-life returns of all RDL modules for full recycling.


