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Radio Design Labs

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    • RDL ST-VP2 Automatic Ducking Module

      RDL ST-VP2 Automatic Ducking Module

      The ST‑VP2 can be wired into any line‑level input of a paging amplifier. A line‑level music source may be provided from a receiver, satellite decoder, tape or CD source. A line‑level voice source may be provided from a telephone paging system at line level, or from a microphone which has been preamplified up to line level (See RDL STM‑1, STM‑2, STM‑2X, STM‑3, STM‑LDA3 Microphone Preamplifiers). When a page is initiated, the module automatically...

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      Item #: ST-VP2

      Availability: More on the way, usually ships in 3-10 business days

      Our Price: $160.11

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    • RDL RU-VSX4 Video Switcher - 4x1 - BNC

      RDL RU-VSX4 Video Switcher - 4x1 - BNC

      The RU-VSX4 is the ideal choice in most applications where four video signals need to be switched to a single output. The RU-VSX4 has two rear panel-jacks for each of the four video bridging input stages. One jack is for the input signal; the other is a loop-through output of the source signal. If 75 Ohm termination of the input signal is required, the terminator (provided) is plugged onto the LOOP OUT jack. The output video signal is 75 Ohm back-terminated to provide unity gain into a 75 Ohm terminated...

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      Item #: RU-VSX4

      Availability: More on the way, usually ships in 3-10 business days

      Our Price: $353.06

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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: In Stock

      Our Price: $100.35

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    • RDL ST-SSR1 Line-Level Audio Switch - 2x1

      RDL ST-SSR1 Line-Level Audio Switch - 2x1

      The ST-SSR1 was designed for absolute silent switching of audio signals. It supports two balanced line-level inputs and one balanced output. Each can be used unbalanced as well. The ST-SSR1 is perfect for switching between two input signals or as a silent On/Off switch for a single channel. Performance is in keeping with the technical standards for which RDL has become known. The user can program the module for either fast or soft switching. The SELECT input feeds the OUTPUT when the TRIG terminal...

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      Item #: ST-SSR1

      Availability: In Stock

      Our Price: $108.10

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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: $59.79

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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: $25.15

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    • RDL ST-UMX3 3x1 Universal Audio Mixer - 3 Mic or Line Inputs x 1 Mic or Line Out

      RDL ST-UMX3 3x1 Universal Audio Mixer - 3 Mic or Line Inputs x 1 Mic or Line Out

      The ST-UMX3 is a three-channel audio mixer for combining mic-level or line-level signals to a single output. A MIC/LINE switch is provided for each input. A separate MIC/ LINE switch selects the output level. Each input features a separate preamplifier circuit, which isolates it from the other inputs. An audio taper single turn gain adjustment is provided for each of the three input preamps. Signals from the three preamps are actively summed and fed to the output amplifier which includes an RDL...

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      Item #: ST-UMX3

      Availability: More on the way, usually ships in 3-10 business days

      Our Price: $137.80

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    • RDL DB-SH1 Stereo Headphone Amplifier - Decora panel with user level control

      RDL DB-SH1 Stereo Headphone Amplifier - Decora panel with user level control

      The DB-SH1 is used in applications requiring headphones of any impedance to be driven from consumer or professional audio sources. The DB-SH1 is ideally suited to applications as diverse as language translation, museums, interview studios and music stores. The module mounts conveniently in a precut opening in a wood or metal enclosure or in various RDL mounting accessories. The DB-SH1 is a dual channel headphone amplifier with balanced/unbalanced left and right inputs. Each input accepts operating...

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      Item #: RDL-DB-SH1

      Availability: More on the way, usually ships in 3-10 business days

      Our Price: $149.00

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    • RDL EZ-HDA6 1x6 Stereo Headphone Distribution Amp - Rear-Panel Outputs

      RDL EZ-HDA6 1x6 Stereo Headphone Distribution Amp - Rear-Panel Outputs

      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-HDA6

      Availability: More on the way, usually ships in 3-10 business days

      Our Price: $179.86

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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: $142.43

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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 TX-1W Music on Hold Amplifier - 1 Watt

      RDL TX-1W Music on Hold Amplifier - 1 Watt

      The TX-1W is the ideal choice in on-site installations where the central telephone switching unit needs to be fed with music, voice or combined music/voice signals. There is a wide variety of telephone instruments in use. When a caller is placed on hold, the audio quality perceived is affected by the caller's own telephone, as well as the telephone lines, central switch and on-site equipment. Due to these variations, conventional audio amplifiers used as music-on-hold drivers frequently produce...

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      Item #: TX-1W

      Availability: More on the way, usually ships in 3-10 business days

      Our Price: $71.24

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    • RDL STM-1 Microphone Preamplifier - 50 dB Gain

      RDL STM-1 Microphone Preamplifier - 50 dB Gain

      The RDL STM-1 is a low-cost quality microphone preamplifier designed for use in commercial sound and broadcast applications. The compact size makes it ideal where a larger or heavier preamp cannot be used. The high-performance circuit provides a fixed 50 dB gain to bring any mic-level signal up to the line-level range of nearly any line input. The STM-1 supply input is single ended and operates from 24 to 33 Vdc. Operation from 12 Vdc is possible with a 6 dB reduction in headroom. For intercom applications,...

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      Item #: STM-1

      Availability: In Stock

      Our Price: $106.03

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    • RDL STA-2A Dual High Gain Line Amplifiers

      RDL STA-2A Dual High Gain Line Amplifiers

      The STA‑2A is a dual‑channel, line‑level audio preamplifier. Each channel is identical. The audio inputs are bridged at 20 kΩ and accept either an unbalanced or a balanced audio signal. Gain is adjustable from unity to +24 dB using a 25‑turn precision audio taper trimming potentiometer. The output line driver circuits are designed to drive long balanced audio lines into 600 Ω loads. The STA‑2A features wideband circuitry for excellent phase response, low...

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      Item #: STA-2A

      Availability: In Stock

      Our Price: $151.06

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    • RDL FP-CH8 Chime Generator - 8 Electronic Chimes

      RDL FP-CH8 Chime Generator - 8 Electronic Chimes

      The FP-CH8 is an electronic chime generator that produces eight different synthesized chimes. Each chime can consist of up to 3 tones and 3 harmonics selected to produce sonically natural effects. Certain chimes are single tones and some are a sequence. Each of the 8 chimes is triggered by an individual external closure to ground. A momentary closure to ground is required to start a chime. A single additional CONT (continuous) terminal is also provided. Each chime plays once unless the CONT terminal...

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      Item #: RDL-FP-CH8

      Availability: In Stock

      Our Price: $233.21

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    • RDL TX-LM2 Line Level to Microphone Level Transformer

      RDL TX-LM2 Line Level to Microphone Level Transformer

      RDL TX-LM2 is a line level to microphone level transformer. Matches a balanced 600Ω phone or other audio line into a mic or line input. Features: Matches balanced 600 Ohm phone (or other line) into mic or line input Balanced Input Dual outputs:Unbalanced line-level and balanced mic-level Frequency response: 20 Hz to 20 kHz (+/- 0.5 dB) THD: < 0.05% (1 kHz)

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      Item #: TX-LM2

      Availability: More on the way, usually ships in 3-10 business days

      Our Price: $37.94

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    • RDL STM-2X Switched Microphone Preamplifier - 35 to 65 dB Gain

      RDL STM-2X Switched Microphone Preamplifier - 35 to 65 dB Gain

      The RDL STM‑2X is the ideal choice in many installations where a microphone preamplifier is required, and is the ideal choice where either a toggle‑type switch or push‑to‑talk switch is to be provided for microphone control, particularly if condenser microphones are used. Features: Quiet Switching of Condenser Microphone Remote Microphone Soft‑Switching Switch a Mic‑Level Source to a Mic or Line Level Output Remote Toggle Switch or Push‑to‑Talk...

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      Item #: STM-2X

      Availability: In Stock

      Our Price: $164.83

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    • RDL D-XLR2F Dual XLR 3-pin Female Jacks on Decora Wall Plate with Terminal Block connections on rear

      RDL D-XLR2F Dual XLR 3-pin Female Jacks on Decora Wall Plate with Terminal Block connections on rear

      Dual XLR 3-pin Female Jacks on Decora Wall Plate with Terminal Block connections on rear. Features: Specifications:

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      Item #: D-XLR2F

      Availability: More on the way, usually ships in 3-10 business days

      Our Price: $22.50

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    • RDL DD-BTN44 Wall-Mounted Bi-Directional Line-Level and Bluetooth Audio Dante Interface (White)

      RDL DD-BTN44 Wall-Mounted Bi-Directional Line-Level and Bluetooth Audio Dante Interface (White)

      The RDL D SERIES-BTN44 modules (DD-BTN44) are Dante networked, wall-mounted audio interfaces that include bidirectional Bluetooth audio, unbalanced analog stereo or mono audio inputs and outputs, and a balanced or unbalanced line-level output. Stereo audio from a compatible Bluetooth-enabled device feeds two Dante network audio channels. Stereo audio connected to a front-panel Mini-Jack or L and R RCA jacks feeds two other Dante network audio channels. Stereo audio is available to users...

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      Item #: RDL-DD-BTN44

      Availability: More on the way, usually ships in 3-10 business days

      Our Price: $685.00

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    • RDL ST-MPA24 Dual Microphone Phantom Adapter - 24 V Adjustable

      RDL ST-MPA24 Dual Microphone Phantom Adapter - 24 V Adjustable

      The ST-MPA24 contains two identical phantom power circuits and a common power supply input. If only one mic input is to be converted for phantom operation, only one circuit needs to be used. Each circuit has a mic input and a mic output. Phantom voltage appears on each of the mic input terminals. There is no voltage on the mic output terminals. Therefore, the ST-MPA24 can convert any existing mic input into a phantom powered input.Module operation is from a 24 Vdc ground referenced power supply....

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      Item #: RDL-ST-MPA24

      Availability: More on the way, usually ships in 3-10 business days

      Our Price: $92.51

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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: In Stock

      Our Price: $159.07

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    • RDL PT-AMG2 Portable Audio Signal Generator & Monitor

      RDL PT-AMG2 Portable Audio Signal Generator & Monitor

      This portable audio instrument is comprised of a precision audio oscillator, precision level meter and speaker. The 700 Hz oscillator section features two outputs. The balanced XLR output is front-panel switch selectable for MIC or LINE level (pro level). The unbalanced output operates at -10 dBV (consumer). Output stability is suited to accurate bench top audio testing. The audio metering circuit features two inputs, an LED meter and a monitor speaker. The balanced input is front-panel switch...

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      Item #: PT-AMG2

      Availability: In Stock

      Our Price: $307.78

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    • Radio Design Labs FP-MR2 Message Repeater

      Radio Design Labs FP-MR2 Message Repeater

      The FP-MR2 is a message repeater that permits electronic storage of a single recording up to one minute forty seconds in duration. This message may be played back manually using an external contact closure to ground or using the front-panel START button. The message may also be played back periodically using the interval timer included in the FP-MR2. A balanced line-level music input allows background music to be connected and the associated input potentiometer allows the installer to set the music...

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      Item #: RDL-FP-MR2

      Availability: In Stock

      Our Price: $296.90

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    • RDL TX-AFC1F Balanced to Unbalanced Audio Transformer - XLR / RCA

      RDL TX-AFC1F Balanced to Unbalanced Audio Transformer - XLR / RCA

      The Radio Design Labs TX-AFC1F is a studio quality balanced to unbalanced audio transformer. It takes an XLR input and transforms it to RCA by means of a studio quality bifilar audio transformer. Conveniently mounts almost anywhere because of its compact housing. The TX-AFC1F is a single-channel (mono) module featuring a female XLR input and phono jack output. A studio quality audio transformer converts the audio input to unbalanced. An integral pad is set to produce an output level of -10 dBV...

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      Item #: TX-AFC1F

      Availability: In Stock

      Our Price: $96.19

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    • RDL HR-ADC1 Analog to Digital Audio Converter

      RDL HR-ADC1 Analog to Digital Audio Converter

      The HR-ADC1 is a broadcast quality A/D converter that provides exceptional audio accuracy and clarity with any audio source or style. Superior analog performance fine tuned through audiophile listening practices produces very low distortion (0.0006%), exceedingly low noise (-135 dB) and remarkably flat frequency response (+/- 0.05 dB). This performance is coupled with unparalleled metering flexibility and programmability with average mastering level monitoring and peak value storage. With external...

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      Item #: HR-ADC1

      Availability: More on the way, usually ships in 3-10 business days

      Our Price: $631.79

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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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