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Radio Design Labs

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    • RDL HD-MA35A 35 Watt Mixer Amplifier with Power Supply - Constant Voltage Output 25 V 70 V or 100 V

      RDL HD-MA35A 35 Watt Mixer Amplifier with Power Supply - Constant Voltage Output 25 V 70 V or 100 V

      The HD-MA35A is a three input audio mixer amplifier for systems demanding a broad range of features and high energy efficiency. Two output power amplifier zones are provided, 35 W (Zone 1) and 2 W (Zone 2). The Zone 1 output is driven from a high-efficiency Class D amplifier stage. The Zone 1 amplifier output level may be VCA controlled using various optional RDL remote controls, or by industry standard 0 to 10 Vdc or 0 to 10 kOhm controls. This output provides a constant voltage (25 V, 70 V or...

       

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      Item #: RDL-HD-MA35A

      Availability: Usually ships in 3-10 business days

      Our Price: $268.80

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    • RDL FP-MP1 Studio Quality Mic Preamp w/ Phantom - Terminals & XLR

      RDL FP-MP1 Studio Quality Mic Preamp w/ Phantom - Terminals & XLR

      The FP-MP1 is the ideal choice in most applications requiring a preamp. RDL's exclusive low-noise discrete circuitry produces studio quality low noise performance in an economical preamplifier. The XLR and plug-in terminal block connections make the FP-MP1 perfect for both rack-mounted hardwired installations and remote use with standard audio cables. A front-panel switch permits the installer to direct phantom voltage to the input connectors. This 3-position switch...

       

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      Item #: FP-MP1

      Availability: In Stock

      Our Price: $218.49

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    • RDL ST-MX3 3 Channel Audio Mixer - Line Input and Output

      RDL ST-MX3 3 Channel Audio Mixer - Line Input and Output

      The ST-MX3 is a line-level mixer module in the STICK-ON Series of products. It provides audio mixing of three line-level inputs with individual input gain adjustments. The line-level output is capable of driving either high or low impedance, balanced or unbalanced loads. The ST-MX3 operates from floating or bipolar dc power. For installations with microphone level inputs, use the ST-UMX3 Universal Audio Mixer. For installations with microphone level inputs, use the ST-UMX3 Universal...

       

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      Item #: ST-MX3

      Availability: In Stock

      Our Price: $122.49

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    • RDL TX-J2 Unbalanced Input Transformer

      RDL TX-J2 Unbalanced Input Transformer

      The RDL TX-J2 Unbalanced Input Transformer is part of Radio Design Labs TX Series and features unbalanced stereo inputs to summed balanced mono output. 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...

       

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      Item #: TX-J2

      Availability: In Stock

      Our Price: $57.49

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    • RDL HD-MA35 35 Watt Mixer Amplifier with Power Supply - Low Impedance Output 4 Ohm or 8 Ohm

      RDL HD-MA35 35 Watt Mixer Amplifier with Power Supply - Low Impedance Output 4 Ohm or 8 Ohm

      The HD-MA35 is a three input audio mixer amplifier for systems demanding a broad range of features and high energy efficiency. Two output power amplifier zones are provided, 35 W (Zone 1) and 2 W (Zone 2). The Zone 1 output is driven from a high-efficiency Class D amplifier stage. The Zone 1 amplifier output level may be VCA controlled using various optional RDL remote controls, or by industry standard 0 to 10 Vdc or 0 to 10 kΩ controls. This output drives 4 Ω or 8 Ω speakers. The...

       

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      Item #: RDL-HD-MA35

      Availability: Usually ships in 3-10 business days

      Our Price: $246.69

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    • RDL ST-ACR1 Line-Level Audio Controlled Relay - 0.5 to 5 s

      RDL ST-ACR1 Line-Level Audio Controlled Relay - 0.5 to 5 s

      The ST-ACR1 is an Audio Controlled Relay in the STICK-ON series. These products are designed for quick, convenient installation, and reliable operation in a variety of control applications. The ST-ACR1 is designed to switch on line level sources. Two multiturn trimmers are provided. The SENS potentiometer adjusts the audio input sensitivity. A threshold LED facilitates accurate adjustment. The module can be set to trigger on signals between -30 dBu and 0 dBu. The DELAY control sets the time required...

       

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      Item #: ST-ACR1

      Availability: Usually ships in 3-10 business days

      Our Price: $96.49

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    • RDL FP-UBC6 Unbalanced to Balanced Converter - 6 Channel

      RDL FP-UBC6 Unbalanced to Balanced Converter - 6 Channel

      The FP-UBC6 is the ideal choice for multiple channel connectorized conversion from unbalanced to balanced audio. This module features six identical channels, making it ideally suited to converting consumer 6-channel surround sound into the professional audio format. Each input channel is unbalanced, connected through a gold-plated phono jack. Each output is balanced. All outputs are connected through XLR jacks with gold-plated pins. A gain trim potentiometer is provided for each channel. The...

       

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      Item #: FP-UBC6

      Availability: Usually ships in 3-10 business days

      Our Price: $370.49

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    • RDL ST-VCA3 Voltage Controlled Amplifier

      RDL ST-VCA3 Voltage Controlled Amplifier

      The ST-VCA3 is used in applications requiring smooth audio level control from a remote control panel, potentiometer or dc voltage (0 to 10 V). Installation in series with the audio input of a power amplifier allows remote control of that amplifier's level. For installations where it is preferred to keep the audio localized in the rack, audio controls are extended outside the rack from the ST-VCA3. Many installations benefit from avoiding long-term potentiometer wear from audio running through the...

       

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      Item #: ST-VCA3

      Availability: In Stock

      Our Price: $117.95

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    • RDL PS-24AS 500mA AC/DC Power Supply For Stick-Ons & Rack Ups

      RDL PS-24AS 500mA AC/DC Power Supply For Stick-Ons & Rack Ups

      Unit powers multiple, similar Stick Ons and Rack-Ups. Call our Tech Support for compatibility of non similar units.

       

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      Item #: PS24V

      Availability: In Stock

      Our Price: $27.99

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    • RDL TX-AVX Automatic Video Switch - 2x1 - BNC

      RDL TX-AVX Automatic Video Switch - 2x1 - BNC

      The RDL TX‑AVX is the ideal choice in installations where automatic switchover to an alternate video source is needed when the primary signal is lost. The unique power supply input allows the TX‑AVX to be powered from a wide variety of existing ac or dc power sources. The TX‑AVX has two video inputs and a single output. The detection circuit bridges the INPUT line. When a valid NTSC or PAL video signal is detected, the INPUT jack is connected to the OUTPUT jack. The output is...

       

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      Item #: TX-AVX

      Availability: Usually ships in 3-10 business days

      Our Price: $156.49

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    • RDL RU-ASX4D 4x1 Stereo Balanced Audio Switcher - Terminal Block

      RDL RU-ASX4D 4x1 Stereo Balanced Audio Switcher - Terminal Block

      The RU-ASX4D is a four channel stereo audio selector with input gain adjustments and output level metering. The inputs and outputs are connected on rear-panel detachable terminal blocks. Each of the four stereo line level inputs accepts either a balanced or an unbalanced signal. Each input is equipped with a rear panel screwdriver-adjustable input gain trimmer. Input signal levels between -15 dBV and +8 dBu may be set to the proper operating level as indicated by a stereo dual-LED VU meter. This...

       

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      Item #: RDL-RU-ASX4D

      Availability: Usually ships in 3-10 business days

      Our Price: $272.75

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    • Radio Design Labs RU-ADA4D 4 Channel Stereo Audio Distribution Amplifier

      Radio Design Labs RU-ADA4D 4 Channel Stereo Audio Distribution Amplifier

      The RU-ADA4D is a four channel stereo audio distribution amplifier with input and output gain adjustments and input level metering. The module may be operated in mono to provide up to eight distributed mono signals. The inputs and outputs are connected on rear-panel detachable terminal blocks. Each of the two line level inputs accepts either a balanced or an unbalanced signal. Each input is equipped with a front panel INPUT GAIN trimmer. Input signal levels between -14 dBV unbalanced and +9 dBu...

       

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      Item #: RDL-RU-ADA4D

      Availability: In Stock

      Our Price: $241.49

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    • RDL ST-PA6 6 W Mono Audio Amplifier - 8 Ohm

      RDL ST-PA6 6 W Mono Audio Amplifier - 8 Ohm

      The ST-PA6 represents the second generation of RDLs breakthrough in the traditional power vs. size ratio. Present technology permits features and performance at the most economical cost ever. The ST-PA6 offers 6 watts of power for a price you would expect to pay for 3 watts. The ST-PA6 features two balanced audio inputs, a gain control, equalization control and an 8 Ohm output. The output is designed to deliver a clean 6 watts RMS into an 8 Ohm speaker. Each input is a balanced bridge, with the...

       

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      Item #: ST-PA6

      Availability: In Stock

      Our Price: $94.49

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    • RDL ST-DA3 Line Level Distribution Amplifier - 1x3

      RDL ST-DA3 Line Level Distribution Amplifier - 1x3

      The ST-DA3 gives you the advantages of an audio distribution amplifier PLUS you can put it where you need it. The ST-DA3 allows bridging of any audio line, adjusting the gain, and driving up to three high or low impedance, balanced or unbalanced loads. The ST-DA3's wideband circuitry produces the unsurpassed pure clarity, low-distortion and low-noise for which RDL products are known. The ST-DA3 features RDL's SupplyFlex power input configuration. The module will operate directly from floating...

       

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      Item #: ST-DA3

      Availability: In Stock

      Our Price: $136.95

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    • RDL ST-LCR1 Logic Controlled Relay - Momentary

      RDL ST-LCR1 Logic Controlled Relay - Momentary

      The ST-LCR1 provides double-pole, double-throw dry switching contacts and LED indicator for relay closure. The ST-LCR1 provides momentary operation and is ideally suited where additional switching contacts are needed to be added to nearly any type of control signal. Features: Add Contacts to Any Control Signal Activation from Logic Circuits DPDT Switching Relay Open-Collector Switching Control from Switch, Button or Logic Circuits

       

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      Item #: ST-LCR1

      Availability: In Stock

      Our Price: $74.49

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    • Radio Design Labs RU-ADA8D 8 Channel Stereo Audio Distribution Amplifier

      Radio Design Labs RU-ADA8D 8 Channel Stereo Audio Distribution Amplifier

      The RU-ADA8D is an eight channel stereo audio distribution amplifier with input and output gain adjustments and input level metering. The module may be operated in mono to provide up to sixteen distributed mono signals. The inputs and outputs are connected on rear-panel detachable terminal blocks. Each of the two line level inputs accepts either a balanced or an unbalanced signal. Each input is equipped with a front panel INPUT GAIN trimmer. Input signal levels between -14 dBV unbalanced and...

       

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      Item #: RDL-RU-ADA8D

      Availability: In Stock

      Our Price: $370.95

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    • RDL FP-UBC2 Unbalanced to Balanced Converter - 2 Channel

      RDL FP-UBC2 Unbalanced to Balanced Converter - 2 Channel

      The FP-UBC2 is the ideal choice for connectorized conversion from unbalanced to balanced audio. This module features two identical channels. Gold-plated phono jacks are utilized for each unbalanced input channel. Each output is balanced, connected through an XLR jack. A gain trim potentiometer is provided for each channel. The normal gain setting is indicated for the trimming potentiometer. This setting produces a +4 dBu balanced output for a -10 dBV unbalanced input. The gain is adjustable -5...

       

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      Item #: FP-UBC2

      Availability: Usually ships in 3-10 business days

      Our Price: $171.49

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    • RDL RM-MP12A Audio Monitor Panel - 12 Line or Speaker Inputs

      RDL RM-MP12A Audio Monitor Panel - 12 Line or Speaker Inputs

      Each RM-MP12 input may be individually calibrated for unbalanced consumer, balanced professional, 8 Ohm speaker line or constant voltage speaker lines. There is a variable intensity LED on the front panel to show audio presence for each input. If the RM-MP12 is set to the interlocking operating mode, front-panel pushbuttons select one of the twelve inputs to feed the calibrated meter, front-panel speaker (or external speaker if connected) and headphone jack. In the mixing mode, the buttons allow...

       

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      Item #: RM-MP12A

      Availability: Usually ships in 3-10 business days

      Our Price: $699.95

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    • RDL HR-DDA4 Digital Audio Distributor - 1x4

      RDL HR-DDA4 Digital Audio Distributor - 1x4

      The HR-DDA4 is the ideal choice in installations requiring high quality distribution of a digital audio signal. The input and each of the four outputs support AES/EBU, S/PDIF or AES-3ID formats. The HR-DDA4 automatically detects a valid input on any of the four input jacks: S/PDIF optical, S/PDIF coaxial, AES-3ID or AES/EBU. The input is decoded, reclocked and retransmitted to four individually buffered outputs. Front-panel LEDs display the digital audio format and sample rate of a valid source...

       

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      Item #: HR-DDA4

      Availability: Usually ships in 3-10 business days

      Our Price: $620.95

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    • RDL RU-MLB4P Mic/Line Bi-Directional Network Interface - PoE

      RDL RU-MLB4P Mic/Line Bi-Directional Network Interface - PoE

      The RU-MLB4 modules are Dante audio network interface products compatible with microphones and line-level audio equipment inputs and outputs. These modules are designed to be mounted in equipment racks, closets, conference tables and on shelves or backboards in commercial/industrial installations. APPLICATION: The RU-MLB4 is a high quality converter that provides professional line-level outputs from four Dante network received audio channels. It also converts four professional or consumer line-level...

       

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      Item #: RDL-RU-MLB4P

      Availability: Usually ships in 3-10 business days

      Our Price: $619.90

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    • RDL RU-LB4P Line-Level Bi-Directional Network Interface - PoE

      RDL RU-LB4P Line-Level Bi-Directional Network Interface - PoE

      The RU-LB4 modules are Dante audio network interface products compatible with line-level audio equipment inputs and outputs. These modules are designed to be mounted in equipment racks, closets, conference tables and on shelves or backboards in commercial/industrial installations. APPLICATION: The RU-LB4 is a high quality converter that provides professional line-level outputs from four Dante network received audio channels. It also converts four professional or consumer line-level sources to Dante...

       

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      Item #: RDL-RU-LB4P

      Availability: Usually ships in 3-10 business days

      Our Price: $552.02

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    • RDL TX-10B Bridging Input Transformer

      RDL TX-10B Bridging Input Transformer

      Features: Add transformer isolation to any line-leve audio input Frequency response: 20 Hz to 20 kHz (+/- 0.5 dB) THD: < 0.05% (1 kHz) 10 k Ohm input bridges any audio line Balanced input and output

       

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      Item #: TX-10B

      Availability: Usually ships in 3-10 business days

      Our Price: $39.95

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    • RDL ST-SH2 Stereo Headphone Amplifier - Stick-On Series

      RDL ST-SH2 Stereo Headphone Amplifier - Stick-On Series

      The ST‑SH2 is used in applications requiring headphones of any impedance to be driven from consumer or professional audio sources. For fixed level installations not requiring user volume control, the ST‑SH2 is wired to the audio source and to a headphone jack. Frequently, it is desirable to mount a volume knob by the headphone jack. The LEVEL ADJUST terminals (L) and (R) may be wired to the respective wipers of a stereo 10 kΩ potentiometer to provide volume adjustment. It is recommended...

       

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      Item #: ST-SH2

      Availability: In Stock

      Our Price: $122.49

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    • RDL EZ-MX4L 4x1 Stereo Line-Level Audio Mixer

      RDL EZ-MX4L 4x1 Stereo Line-Level Audio Mixer

      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....

       

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      Item #: EZ-MX4L

      Availability: Usually ships in 3-10 business days

      Our Price: $152.95

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    • RDL FP-NML2V Network to Mic/Line Interface with VCA

      RDL FP-NML2V Network to Mic/Line Interface with VCA

      The FP-NML2V modules are Dante audio network interface products compatible with mic-level or line-level audio equipment inputs. These modules are designed to be mounted in equipment racks, closets, conference tables and on shelves or backboards in commercial/industrial installations. APPLICATION: The FP-NML2V is a high quality converter that provides professional line-level outputs from two Dante network audio channels. Each un-attenuated line output provides +4 dBu balanced for a network digital...

       

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      Item #: RDL-FP-NML2V

      Availability: Usually ships in 3-10 business days

      Our Price: $459.00

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      The concept of Application-Specific-Modules was first introduced by RDL more than twenty years ago - a concept promoting unsurpassed value and performance. As the inventor of Application-Specific-Modules, RDL continues to lead the industry with their solutions to specific problems as well as building blocks of quality audio/video system designs. Markertek is the largest in-stock source for Radio Design Labs Products.

      Markertek is an authorized dealer for the entire Radio Design Labs line. If you don't see what you're looking for, contact us and we'll do our best to get it for you.

       
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