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Radio Design Labs

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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 ST-CL2 Compressor/Limiter - Line Level

      RDL ST-CL2 Compressor/Limiter - Line Level

      The ST-CL2 is a high performance compressor/limiter designed to maintain a constant average output level and effective peak control over a wide range of input levels. The input and output are line level and each may be wired balanced or unbalanced. Trimmers provide adjustment for all usual professional and consumer audio input and output levels. Internal detectors feed three timing circuits. The threshold level and slope of each timing circuit are incremented to respond sequentially to signals of...

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      Item #: ST-CL2

      Availability: In Stock

      Our Price: $146.10

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    • RDL TX-8A 4 Ohm / 8 Ohm Input Interface

      RDL TX-8A 4 Ohm / 8 Ohm Input Interface

      The TX-8A is the ideal choice in many applications requiring superior quality transformer coupling between the output of a 4 or 8 Ohm power amplifier and the input of an audio mixer or amplifier. A front-panel LEVEL control allows the output to be adjusted for -10 dBV or +4 dBu over a wide range of amplified power levels. The TX-8A is a single-channel (mono) module featuring barrier block connections for the input and output. A high quality bifilar wound audio transformer couples the audio input...

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      Item #: RDL-TX-8A

      Availability: In Stock

      Our Price: $69.16

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    • RDL ST-MPA48 Dual Microphone Phantom Adapter - 48 V

      RDL ST-MPA48 Dual Microphone Phantom Adapter - 48 V

      The ST-MPA48 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. Therefore, the ST-MPA48 can convert any existing mic input into a 48 Vdc phantom powered input. Phantom voltage is not present on the output terminals.The power supply input terminals may be fed with any...

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      Item #: RDL-ST-MPA48

      Availability: Usually ships in 3-10 business days

      Our Price: $123.55

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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-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: $98.27

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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 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: Usually ships in 3-10 business days

      Our Price: $142.43

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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: $77.48

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    • RDL RU-MLD4 Microphone / Line Distribution Amplifier - 1x4

      RDL RU-MLD4 Microphone / Line Distribution Amplifier - 1x4

      The RU-MLD4 is a four channel audio distribution amplifier. The input and all four outputs may be connected through the front-panel XLR jacks or on the rear panel detachable terminal blocks. The input accepts either a balanced microphone or line level signal. Each of the four outputs provides either a microphone or line level signal. Both the front-panel XLR connectors and the rear-panel terminals are active at all times. The RU-MLD4 may be rack-mounted with the XLR jacks facing forward, or may...

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      Item #: RU-MLD4

      Availability: Usually ships in 3-10 business days

      Our Price: $267.23

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    • RDL DB-PSP1 Decora-Style Active Loudspeaker

      RDL DB-PSP1 Decora-Style Active Loudspeaker

      The D SERIES-PSP1 is a compact active loudspeaker that delivers rich, detailed sound in Decora-compatible wall or chassis mounts. The input accepts either a -10 dBV unbalanced or a +4 dBu balanced signal on the rear-panel detachable terminal block. Amplification is provided by a high-efficiency Class D power stage with audio filtering tailored for crisp, pleasant audio clarity. The high-efficiency Class D output stage produces negligible heat for all levels of expected voice or music modulation....

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      Item #: RDL-DB-PSP1

      Availability: Usually ships in 3-10 business days

      Our Price: $186.94

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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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    • RDL TX-MVX Manual Rmt Controlled Video Switch - 2x1 - BNC

      RDL TX-MVX Manual Rmt Controlled Video Switch - 2x1 - BNC

      The TX-MVX is the ideal choice in installations where either a manual switch or an open-collector must switch video signals. VIDEO A is normally connected to COMMON. When the TRIG terminal is pulled to ground, VIDEO B is connected to COMMON and VIDEO A is disconnected. The TX-MVX utilizes a high-quality RF relay allowing the module to either route a single video source to one of two destinations, or switch two video sources to a single video destination. The actual switch (or other...

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      Item #: TX-MVX

      Availability: Usually ships in 3-10 business days

      Our Price: $99.78

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    • RDL AV-HK1 HUM KILLER Stereo Audio Isolation Transformer

      RDL AV-HK1 HUM KILLER Stereo Audio Isolation Transformer

      The AV‑HK1 is a stereo transformer isolation module for use with unbalanced, high impedance audio inputs. Input and output connections are provided on gold‑plated phono jacks. The AV‑HK1 is supplied with two adapter cables to facilitate connecting with products that use mini‑plugs and jacks. The shield connection of each INPUT jack is electrically isolated from the case and from the output ground. The shield connection of each OUTPUT jack is connected to the case shield....

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      Item #: AV-HK1

      Availability: In Stock

      Our Price: $90.98

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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 ST-ACR2 Line-Level Audio Controlled Relay - 5 to 50 s Delay

      RDL ST-ACR2 Line-Level Audio Controlled Relay - 5 to 50 s Delay

      The ST-ACR2 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-ACR2 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-ACR2

      Availability: Usually ships in 3-10 business days

      Our Price: $100.35

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    • RDL TX-A2D Dual Audio Converter - Balanced to Unbalanced

      RDL TX-A2D Dual Audio Converter - Balanced to Unbalanced

      The TX-A2D is the ideal choice in installations requiring passive isolation and level attenuation between a professional balanced line-level stereo source and consumer equipment unbalanced inputs. The TX-A2D is a complete unbalanced stereo line-level audio output module. The front panel provides a detachable terminal block for connecting each channel of a balanced +4 dBu audio source. The input signals are coupled to two front-panel gold plated phono jacks through studio-quality isolation transformers....

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      Item #: RDL-TX-A2D

      Availability: Usually ships in 3-10 business days

      Our Price: $107.64

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    • RDL D-BT1A Wall Mounted Bluetooth Audio Format-A Interface (White)

      RDL D-BT1A Wall Mounted Bluetooth Audio Format-A Interface (White)

      The RDL D SERIES-BT1A modules (D-BT1A) are Bluetooth audio receiving modules compatible with RDL® Format-A twisted pair receivers. When paired with a compatible Bluetooth enabled device, the module receives stereo audio from the Bluetooth source. The stereo signal is sent through two Format-A pairs to any RDL Format-A receiver. A stereo/mono switch set by the installer permits summed mono audio to be sent over one switch-selected pair to the Format-A receiver. If set for stereo operation,...

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      3 Colors Available

      Item #: RDL-D-BT1A

      Availability: Direct Ship From Manufacturer

      Our Price: $279.00

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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: $768.00

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    • Radio Design Labs D-J3 Mic/Line Input Assembly - White

      Radio Design Labs D-J3 Mic/Line Input Assembly - White

      The D/DS/RCX-J3 is a complete audio input panel assembly. The front panel features a female XLR jack and two phono jacks. The XLR is connected directly to the rear-panel barrier block. The phono jacks are intended for mono or stereo consumer level sources. LEFT and RIGHT are combined and balanced through audio transformers configured to reject induced hum. The line-level output is provided on the rear-panel terminal block for connection to 10 k Ohm or higher input impedance line level module or...

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      3 Colors Available

      Item #: RDL-D-J3

      Availability: Usually ships in 3-10 business days

      Our Price: $50.83

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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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      3 Colors Available

      Item #: RDL-DD-BTN44

      Availability: Usually ships in 3-10 business days

      Our Price: $685.00

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    • RDL ST-UBA2 Unbalanced to Balanced Amplifier - 2 Channel

      RDL ST-UBA2 Unbalanced to Balanced Amplifier - 2 Channel

      The ST-UBA2 is used in any application requiring conversion from unbalanced consumer format signals to professional +4 dBu. It may be used to balance audio from CD players, cassette decks, computer sound cards, televisions, and a wide variety of other unbalanced sources. The mono sum output may be used to drive patch-bay jacks, monitors or subwoofer amplifiers. Separate Dual-LED VU metering is provided for the left and right outputs. A green LED illuminates at 15 dB below +4 dBu. The intensity...

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      Item #: ST-UBA2

      Availability: In Stock

      Our Price: $154.90

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    • RDL RK-2U 19-Inch Utility Rack Chassis - 2 RU

      RDL RK-2U 19-Inch Utility Rack Chassis - 2 RU

      Backboard or Shelf Mount.The RK-2U is a versatile equipment rack designed to mount to any flat surface or to sit on a shelf. The rack holds standard 19" rack mounted equipment 2RU in height. Threads for either US #10-32 or metric M5 rackscrews are provided. The RK-2U is ideal for mounting RDL racking accessories and modules and many industry products. Features: Specifications: Dimensions: Height: 3.63 in. 8.22 cm; Depth: 8.5 in. 21.60 cm; Width: 19.25 in. 48.90 cm Package Type:...

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      Item #: RDL-RK-2U

      Availability: Usually ships in 3-10 business days

      Our Price: $153.00

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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: $283.65

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    • RDL RU-MLB4 Mic/Line Bi-Directional DANTE Network Interface

      RDL RU-MLB4 Mic/Line Bi-Directional DANTE Network Interface

      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-MLB4

      Availability: Usually ships in 3-10 business days

      Our Price: $549.95

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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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