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Radio Design Labs

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    • RDL STA-1 Dual Balanced/Unbalanced Line Amplifier -12 to 20 dB Gain

      RDL STA-1 Dual Balanced/Unbalanced Line Amplifier -12 to 20 dB Gain

      The STA-1 is a dual-channel line-level preamplifier with bridging inputs, adjustable gain or loss, and low-impedance outputs. Each of the two identical circuits is both an electronic line transformer and a line amplifier. Hook up the STA-1 just like a pair of audio transformers with gain. True dc amplifiers produce unsurpassed audio clarity, high common-mode rejection, ultra-low distortion and low noise. The STA-1 is perfect for most line amplification, impedance or balanced/unbalanced conversion. The...

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      Item #: STA1

      Availability: In Stock

      Our Price: $150.28

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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-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: Usually ships in 3-10 business days

      Our Price: $137.80

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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: In Stock

      Our Price: $353.06

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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 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: Usually ships in 3-10 business days

      Our Price: $71.24

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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 DB-HPA3 3.5 Watt Audio Power and Headphone Amplifier

      RDL DB-HPA3 3.5 Watt Audio Power and Headphone Amplifier

      The D SERIES-HPA3 is a high efficiency 3.5 W power amplifier with one line input, an amplified output to drive a 4 or 8 ohm speaker and a separate headphone amplifier. The -HPA3 features a balanced line level input that may be connected unbalanced. The gain range will accommodate standard unbalanced levels as well as professional balanced levels. The amplified output levels are controlled by a front-panel volume control.The amplifier features a Mini-Jack headphone output on the front panel. When...

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      Item #: RDL-DB-HPA3

      Availability: Usually ships in 3-10 business days

      Our Price: $189.49

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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: $59.79

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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: In Stock

      Our Price: $385.32

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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: Usually ships in 3-10 business days

      Our Price: $127.39

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    • RDL DD-BN22 Wall-Mounted Bi-Directional Mic/Line Dante Interface 2 x 2

      RDL DD-BN22 Wall-Mounted Bi-Directional Mic/Line Dante Interface 2 x 2

      The DD-BN22 is a complete wall-mounted Dante audio network interface. It features two XLR mic or line inputs and two XLR mic or line outputs on the front panels. Special software is not required to configure the DD-BN22. Each XLR input provides three switches that may be set from the front of the unit when the cover plate is not installed. One switch enables or disables P48 phantom; the second switch selects the mic or line gain range; the third switch sets the gain. Each XLR output provides a...

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      Item #: RDL-DD-BN22

      Availability: Usually ships in 3-10 business days

      Our Price: $550.00

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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-MX2R Audio Mixer / Distribution Amplifier

      RDL TX-MX2R Audio Mixer / Distribution Amplifier

      The TX-MX2R is the ideal choice in installations requiring the active, isolated mixing of two unbalanced line-level audio sources to feed either one or two unbalanced destinations. The input circuits are high-impedance, line-level (-10 dBV) and are each isolated from each other. Therefore the modules may be used to bridge an unbalanced stereo source without affecting the stereo separation. Each output from the TX-MX2R is a mono mix of the stereo signal. Normally, the gain trimmers are set to...

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      Item #: TX-MX2R

      Availability: Usually ships in 3-10 business days

      Our Price: $85.95

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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 RU-UDA4 Stereo Audio Distribution Amplifier - 2x4 - RCA Jacks

      RDL RU-UDA4 Stereo Audio Distribution Amplifier - 2x4 - RCA Jacks

      The RU-UDA4 is the optimum choice where connectorized, unbalanced line-level distribution is needed. This unit features two separate, isolated channels. The RU-UDA4 may be used in stereo applications, or as two individual monaural distribution amplifiers. The input signals are buffered through output line drivers, providing four separate line-level unbalanced outputs for each of the two inputs. The RU-UDA4 performance is tailored around industry standard -10 dBV input/output levels. Excellent...

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      Item #: RU-UDA4

      Availability: Usually ships in 3-10 business days

      Our Price: $174.67

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    • RDL STD-600 Passive Audio Divider/Combiner - 600 Ohm

      RDL STD-600 Passive Audio Divider/Combiner - 600 Ohm

      Each STD module is a resistive branching network with RF filtering on each of the four channels. Any channel, A through D, may be either an input or an output. This permits combining stereo signals into mono inputs, splitting mono signals to multiple inputs, and even combining microphones with output shorting switches into a single amplifier input. The STD modules are available in 150 Ohm, 600 Ohm and 10 k Ohm models. All inputs and outputs are balanced. Features: 600 Ohm Operation Combine Audio...

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      Item #: STD-600

      Availability: In Stock

      Our Price: $56.67

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    • RDL SMB-1G 1-Gang Surface Mount Box for Decora Remote Controls and Panels Gray

      RDL SMB-1G 1-Gang Surface Mount Box for Decora Remote Controls and Panels Gray

      The SMB-1, 2, 3 and 4 surface mount boxes hold one, two, three or four Decorar-style products, including RDL remote controls and connector plates. Knockouts are provided for fastening standard metric or North American conduits to the rear of the box and to either the upper or lower surface, depending on the orientation of the box when it is mounted. The sides and top or bottom of the box maintain a smooth surface for a finished appearance superior to that of a standard electrical box. Model numbers...

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      Item #: RDL-SMB-1G

      Availability: Usually ships in 3-10 business days

      Our Price: $39.47

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    • RDL ST-LCR2 Logic Controlled Relay - Latching

      RDL ST-LCR2 Logic Controlled Relay - Latching

      The RDL ST‑LCR2 provides double‑pole, double‑throw dry switching contacts and LED indicator for relay closure. The ST‑LCR2 is used where momentary pulses must alternately toggle on/off switching contacts. Open‑collector slave output allows connection of remote on indicator or an ST‑LCR1 for additional relay contacts. Features: Alternate‑Action Switching Add Contacts to Any Control Signal Activation from Logic Circuits DPDT Switching Relay Open‑Collector...

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      Item #: ST-LCR2

      Availability: Usually ships in 3-10 business days

      Our Price: $111.78

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    • RDL DB-SP1A 2 Watt Decora-Style 8 Ohm Loudspeaker

      RDL DB-SP1A 2 Watt Decora-Style 8 Ohm Loudspeaker

      The D SERIES-SP1A is a compact 8 ohm loudspeaker that delivers rich, detailed sound in Decora-compatible wall or chassis mounts. The driver is constructed of materials found in premium larger speakers. The unique steel enclosure provides full baffling in a tightly sealed rigid structure. This produces sonic presence within an extended frequency range expected from larger speakers. Internal filtering rolls off out-of-band frequencies to reduce distortion and increase peak power capability. Dispersion...

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      Item #: RDL-DB-SP1A

      Availability: Usually ships in 3-10 business days

      Our Price: $75.08

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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: In Stock

      Our Price: $99.78

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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: Usually ships in 3-10 business days

      Our Price: $160.11

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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: Usually ships in 3-10 business days

      Our Price: $631.79

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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: In Stock

      Our Price: $685.00

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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: In Stock

      Our Price: $123.55

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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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