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Radio Design Labs

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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 DB-SH1M Stereo Headphone Amplifier

      RDL DB-SH1M Stereo Headphone Amplifier

      The DB-SH1M is used in applications requiring headphones of any impedance to be driven from consumer or professional audio sources. It is ideally suited to applications as diverse as language translation, museums, interview studios and music stores. The -SH1 is a dual channel headphone amplifier with balanced/unbalanced left and right inputs. Each input accepts operating levels between -20 dBV and +20 dBu. Two recessed slide switches located on the side of the rear enclosure are set prior to mounting...

       

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      Item #: RDL-DB-SH1M

      Availability: Usually ships in 3-10 business days

      Our Price: $140.50

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    • RDL RU-LB4 Line-Level Bi-Directional Network Interface

      RDL RU-LB4 Line-Level Bi-Directional Network Interface

      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-LB4

      Availability: Usually ships in 3-10 business days

      Our Price: $484.70

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    • RDL RU-NL2 Network to Line Level Interface

      RDL RU-NL2 Network to Line Level Interface

      The RU-NL2 modules are Dante audio network interface products compatible with 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 RU-NL2 is a high quality converter that provides professional line-level outputs from two Dante network audio channels. Each output provides +4 dBu balanced for a network digital audio level of -18 dBFS. The professional...

       

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      Item #: RDL-RU-NL2

      Availability: Usually ships in 3-10 business days

      Our Price: $369.50

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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: Usually ships in 3-10 business days

      Our Price: $145.25

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    • RDL FP-PA20A 20 W Mono Audio Amplifier - 70 V or 100 V

      RDL FP-PA20A 20 W Mono Audio Amplifier - 70 V or 100 V

      The FP-PA20A features a balanced line level input that may be connected unbalanced. A front panel gain control is designed to be adjusted either manually or with a trimming screwdriver. The gain range will accommodate standard unbalanced levels as well as professional balanced levels. Both a 70 V and 100 V amplified output are provided to drive corresponding speakers in a distributed sound system. Audio levels that could cause the amplified output to clip are compressed using two dynamic time constants...

       

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      Item #: FP-PA20A

      Availability: Usually ships in 3-10 business days

      Our Price: $144.95

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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: Usually ships in 3-10 business days

      Our Price: $158.49

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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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    • RDL STM-3 High Gain Microphone Preamplifier - 35 to 75 dB Gain

      RDL STM-3 High Gain Microphone Preamplifier - 35 to 75 dB Gain

      The STM-3 is a quality low-noise microphone preamplifier designed for use in surveillance, commercial sound, broadcast, and recording where higher than normal gain is required. The STM-3 is very flexible, with gain adjustment from 45 to 75 dB, two balanced or unbalanced outputs, and available phantom supply input. Its low-distortion and low-noise performance make it the best choice, even when larger preamps could be used. The single-ended supply input range is from 24 to 33 Vdc. Operation from 12...

       

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      Item #: STM-3

      Availability: Usually ships in 3-10 business days

      Our Price: $159.55

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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 ST-SX4 Unbalanced Audio Switcher - 4x1

      RDL ST-SX4 Unbalanced Audio Switcher - 4x1

      The ST-SX4 accepts up to four unbalanced audio sources. Any of these sources may be selected to feed the output, or all sources may be switched off. The output from the ST-SX4 is unbalanced. Control of the module is accomplished through a single input terminal. Connection of a specified resistance between the CTRL input and ground causes the desired input to be switched on. The necessary external resistors are supplied with the ST-SX4. The ST-SX4 may be remote controlled using the RC4-ST remote...

       

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      Item #: ST-SX4

      Availability: Usually ships in 3-10 business days

      Our Price: $99.95

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    • RDL SF-NL2 Two Dante Channel to Two Balanced Analog XLR Audio Network Interface

      RDL SF-NL2 Two Dante Channel to Two Balanced Analog XLR Audio Network Interface

      The RDL SF-NL2 is a line-level interface that converts two Dante network audio channels to two balanced audio outputs on XLR connectors. Each channel provides +4 dBu balanced for a network digital audio level of -20 dBFS. Each output is equipped with a selector to set the output to line level or attenuate the output by 50 dB to mic level. Special software is not required to configure the module. The SF-NL2 is a professional grade product for studio quality fidelity and low noise...

       

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      Item #: RDL-SF-NL2

      Availability: In Stock

      Our Price: $339.35

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    • RDL ST-MX2 2 Channel Audio Mixer - Microphone or Line Input and Output

      RDL ST-MX2 2 Channel Audio Mixer - Microphone or Line Input and Output

      The ST‑MX2 is used in any application requiring mixing of two audio sources. A mic may be mixed with a line‑level music source. Two mics may be mixed to feed the mic or line level input of a power amplifier. A mic or professional +4 dBu line‑level mono sum is possible. It may be used to convert mono line‑level signals from consumer to professional, or from professional to consumer format. It may also be used as a microphone preamplifier, or conversely to adapt unbalanced...

       

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      Item #: ST-MX2

      Availability: In Stock

      Our Price: $132.49

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    • RDL EZ-ADA4 1x4 Stereo Audio Distribution Amplifier

      RDL EZ-ADA4 1x4 Stereo Audio Distribution Amplifier

      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-ADA4

      Availability: In Stock

      Our Price: $132.95

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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: $54.49

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    • RDL SF-BNC2 Bidirectional Unbalanced Stereo Audio Network Interface

      RDL SF-BNC2 Bidirectional Unbalanced Stereo Audio Network Interface

      The SF-BNC2 is a bidirectional Dante audio network interface. It features two unbalanced audio inputs (left and right) on RCA or stereo 3.5 mm Mini-jack connectors, as well as two unbalanced audio outputs (left and right) on RCA and stereo 3.5 mm Mini-jack connectors. Special software is not required to configure the SF-BNC2. Each input provides a network digital audio level of -20 dBFS for an unbalanced -10 dBV input. Each output provides -10 dBV unbalanced for a network digital...

       

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      Item #: RDL-SF-BNC2

      Availability: Usually ships in 3-10 business days

      Our Price: $589.50

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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: In Stock

      Our Price: $582.20

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    • RDL TX-A2 Balanced to Unbalanced Audio Converter

      RDL TX-A2 Balanced to Unbalanced Audio Converter

      The TX-A2 is the ideal choice in installations requiring passive isolation and level attenuation between a professional balanced line-level mono source and consumer equipment unbalanced inputs. The TX-A2 is a complete unbalanced line-level audio output module. The front panel provides a detachable terminal block for connection of a balanced +4 dBu audio source. The input signal is coupled to two front-panel gold plated RCA jacks through a studio-quality isolation transformer. Each output is coupled...

       

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      Item #: RDL-TX-A2

      Availability: In Stock

      Our Price: $86.95

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    • RDL RU-VCA6A  Digitally Controlled Six Channel Audio Attenuator

      RDL RU-VCA6A Digitally Controlled Six Channel Audio Attenuator

      The RU-VCA6A is a full-featured studio-quality dual-channel audio attenuator module for local and/or remote control of balanced or unbalanced line-level sources. The RU-VCA6A has six audio channels for level control of surround sound (5.1) or six individual analog audio channels. Each module can be remote controlled from a single or multiple locations. Rear-panel terminals provide flexible control options using a variety of RDL remote controls or OEM equipment. Audio levels are controlled in...

       

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      Item #: RDL-RU-VCA6A

      Availability: Usually ships in 3-10 business days

      Our Price: $582.30

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    • RDL RU-MX5ML 5 Channel Mic/Line Audio Mixer with Phantom Power

      RDL RU-MX5ML 5 Channel Mic/Line Audio Mixer with Phantom Power

      The RU-MX5ML is the ideal choice in many applications where a combination of balanced mic and/or balanced or unbalanced line-level signals needs to be mixed with the ability for additional expansion. All connections are made using detachable terminal blocks on the rear panel. Four of the RU-MX5ML inputs can accept either mic or line inputs. The fifth input is for line level sources. 24 V phantom is individually switch selectable for each mic input. The output from one RU-MX5ML may connect to...

       

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      Item #: RU-MX5ML

      Availability: In Stock

      Our Price: $254.95

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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-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: $96.49

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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 RU-ADL2 Professional Audio Delay - 0 to 135 mS

      RDL RU-ADL2 Professional Audio Delay - 0 to 135 mS

      The RU-ADL2 is a DSP based dual-output delay for an analog audio source. It provides exceptional audio performance for the most critical applications in a professional audio environment. The RU-ADL2 accepts a single monaural audio input and provides two separate monaural outputs. The time delay on each output is individually adjustable from 0 to 135 mS. A large, bright 3-digit LED numeric display on the front panel shows the time delay set for each of the two outputs. A locking pushbutton switch...

       

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      Item #: RU-ADL2

      Availability: Usually ships in 3-10 business days

      Our Price: $470.95

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    • RDL RU-VCA2A Digitally Controlled 2 Channel Audio Attenuator

      RDL RU-VCA2A Digitally Controlled 2 Channel Audio Attenuator

      The RU-VCA2A by RDL is a full-featured studio-quality dual-channel audio attenuator module for local and/or remote control of balanced or unbalanced line-level sources. Each module can be remote controlled from a single or multiple locations. Rear-panel terminals provide flexible control options using a variety of RDL remote controls or OEM equipment. Audio levels are controlled in 0.5 dB steps using noiseless zero-crossing digital attenuators for optimum reliability, precise...

       

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      Item #: RDL-RU-VCA2A

      Availability: Usually ships in 3-10 business days

      Our Price: $432.95

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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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