Continue Shopping View Cart
Markertek - The Future of Broadcast Supply

Call 800-522-2025
M-F 8:30am - 7pm EST

Employee-Owned-Banner

Secure LoginClose X

Returning Markertek Customers

New Markertek Customers





Why Create an Account?

Creating a Markertek account now will save you time on future orders. You'll have full access to your order history and a personalized shopping experience.

 
Radio Design Labs

Narrow Results:

Categories

 

Need Assistance?

Get unbiased, vendor-neutral advice from actual broadcast & pro-audio professionals.

  • Online:
  • Contact Us
  • By Phone:
  • Toll Free: 800-522-2025
    (USA, Canada, Mexico, Caribbean)
    International: 845-246-3036
    Fax:: 845-246-1757

    Hours of Operation:
    8:30am - 7:00pm Eastern
    Monday - Friday

View As:

Sort By:

Display:

Radio Design Labs:

Page:

►►
    ◄◄
     
     
     
    • RDL STM-2 Adjustable Gain Microphone Preamplifier - 35 to 65 dB Gain

      RDL STM-2 Adjustable Gain Microphone Preamplifier - 35 to 65 dB Gain

      The RDL STM‑2 is a quality low‑noise microphone preamplifier designed for use in commercial sound, broadcast, and recording. The STM‑2 is very flexible, with gain adjustment from 35 to 65 dB, two balanced or unbalanced outputs, and available phantom supply input. Its ultra‑low distortion and low noise performance make it the best choice, even when larger preamps could be used. The STM 2 supply input is single ended and operates from 24 Vdc. Operation from 12 Vdc is possible...

      Free Ship Banner

      Read More

      Item #: STM-2

      Availability: In Stock

      Our Price: $145.54

      Add to Wishlist
    • 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...

      Free Ship Banner

      Read More

      Item #: STM-2X

      Availability: In Stock

      Our Price: $164.83

      Add to Wishlist
    • 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...

      Free Ship Banner

      Read More

      Item #: STA1

      Availability: In Stock

      Our Price: $150.28

      Add to Wishlist
    • 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...

      Free Ship Banner

      Read More

      Item #: RU-VSX4

      Availability: Usually ships in 3-10 business days

      Our Price: $353.06

      Add to Wishlist
    • 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...

      Free Ship Banner

      Read More

      Item #: RDL-RU-ADA4D

      Availability: In Stock

      Our Price: $251.15

      Add to Wishlist
    • 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.

      Free Ship Banner

      Read More

      Item #: PS24V

      Availability: In Stock

      Our Price: $29.11

      Add to Wishlist
    • RDL RU-NL4P Network to Line Level Interface - PoE

      RDL RU-NL4P Network to Line Level Interface - PoE

      The RU-NL4 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-NL4 is a high quality converter that provides professional line-level outputs from four Dante network audio channels. Each output provides +4 dBu balanced for a network digital audio level of -18 dBFS. The professional...

      Free Ship Banner

      Read More

      Item #: RDL-RU-NL4P

      Availability: Usually ships in 3-10 business days

      Our Price: $467.02

      Add to Wishlist
    • 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...

      Free Ship Banner

      Read More

      Item #: TX-AFC1F

      Availability: In Stock

      Our Price: $96.19

      Add to Wishlist
    • 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...

      Free Ship Banner

      Read More

      Item #: STA-2A

      Availability: In Stock

      Our Price: $151.06

      Add to Wishlist
    • 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

      Free Ship Banner

      Read More

      Item #: TX-10B

      Availability: In Stock

      Our Price: $41.55

      Add to Wishlist
    • 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...

      Free Ship Banner

      Read More

      Item #: TX-J2

      Availability: In Stock

      Our Price: $59.79

      Add to Wishlist
    • RDL ST-NG1 White and Pink Noise Generator

      RDL ST-NG1 White and Pink Noise Generator

      The ST-NG1 is the ideal choice where random white or pink noise is needed. It is suitable either as a reference noise source for audio measurements or as a masking noise source in engineered sound or counter-intelligence applications. Amplitude limiting circuitry in the ST-NG1 controls extreme peak excursions while preserving random variations of at least 20 dB. The noise generating circuitry in the ST-NG1 is truly random analog noise occupying the full bandwidth from 20 Hz to 20 kHz. This makes...

      Free Ship Banner

      Read More

      Item #: ST-NG1

      Availability: In Stock

      Our Price: $130.23

      Add to Wishlist
    • 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...

      Free Ship Banner

      Read More

      Item #: ST-PA6

      Availability: In Stock

      Our Price: $98.27

      Add to Wishlist
    • RDL FP-PA35A 35 W Mono Audio Amp - 25 V / 70 V / 100 V w/Power Supply

      RDL FP-PA35A 35 W Mono Audio Amp - 25 V / 70 V / 100 V w/Power Supply

      The FP-PA35A is the ideal choice in many applications where multiple 25 V, 70 V or 100 V speakers in a zone need to be powered from a single audio power amplifier. The FP-PA35A features a balanced line level input that may be connected unbalanced. A front panel gain control is designed to be adjusted manually or with a trimming screwdriver. The gain range will accommodate standard unbalanced levels as well as professional balanced levels. Multiple distributed sound system speakers connect to...

      Free Ship Banner

      Read More

      Item #: FP-PA35A

      Availability: Usually ships in 3-10 business days

      Our Price: $218.90

      Add to Wishlist
    • 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...

      Free Ship Banner

      Read More

      Item #: STD-600

      Availability: In Stock

      Our Price: $56.67

      Add to Wishlist
    • 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...

      Free Ship Banner

      Read More

      Item #: RDL-RU-LB4

      Availability: Usually ships in 3-10 business days

      Our Price: $504.09

      Add to Wishlist
    • 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

      Free Ship Banner

      Read More

      Item #: ST-LCR1

      Availability: In Stock

      Our Price: $77.48

      Add to Wishlist
    • RDL RU-RA3R 19 Inch Rack Adapter for 3 Rack-Up Modules

      RDL RU-RA3R 19 Inch Rack Adapter for 3 Rack-Up Modules

      The RU-RA3R rack mounts 3 RACK-UP modules in fixed or mobile installations. Metal RACK-UP series products drop into the chassis, slide into position and are secured by tightening two screws provided with the RACK-UP product or accessory.

      Free Ship Banner

      Read More

      Item #: RDL-RU-RA3R

      Availability: In Stock

      Our Price: $60.93

      Add to Wishlist
    • RDL AV-HK1X HUM KILLER Audio Isolation Transformer XLR Input/Output

      RDL AV-HK1X HUM KILLER Audio Isolation Transformer XLR Input/Output

      The AV-HK1X is a mono transformer isolation module for use with a balanced, low impedance source and either a low or high impedance load. Input and output connections are provided on XLR jacks with gold-plated contacts. The shield (pin 1) connection of the INPUT jack is electrically isolated from the case and from the output ground (pin 1) at audio frequencies. The ground (pin 1) connection of the OUTPUT jack is connected to the case shield. The user audio source, such as a mixer, preamplifier...

      Free Ship Banner

      Read More

      Item #: AV-HK1X

      Availability: In Stock

      Our Price: $99.79

      Add to Wishlist
    • RDL EZ-HSX4 4x1 Stereo Audio Input Switcher with Headphone Amp

      RDL EZ-HSX4 4x1 Stereo Audio Input Switcher with Headphone Amp

      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....

      Free Ship Banner

      Read More

      Item #: EZ-HSX4

      Availability: Usually ships in 3-10 business days

      Our Price: $167.38

      Add to Wishlist
    • 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...

      Free Ship Banner

      Read More

      Item #: FP-UBC6

      Availability: In Stock

      Our Price: $385.32

      Add to Wishlist
    • RDL AV-XMN4 Microphone to DANTE Network Interface

      RDL AV-XMN4 Microphone to DANTE Network Interface

      The AV-XMN4 is an interface that converts four XLR microphone inputs to Dante network audio channels. Special software is not required to configure the AV-XMN4. Each XLR input is equipped with a switch to set the gain for dynamic or condenser microphones. A dual-LED VU meter displays the level for each input to facilitate selection of the ideal gain range. P48 phantom voltage is supplied to each microphone input. The AV-XMN4 is a professional grade product with discrete mic preamplifiers...

      Free Ship Banner

      Read More

      Item #: RDL-AV-XMN4

      Availability: Usually ships in 3-10 business days

      Our Price: $729.95

      Add to Wishlist
    • RDL SF-XMN4 Microphone To Network Interface

      RDL SF-XMN4 Microphone To Network Interface

      The SF-XMN4 is an interface that converts four XLR microphone inputs to Dante network audio channels. Special software is not required to configure the SF-XMN4. Each XLR input is equipped with a switch to set the gain for dynamic or condenser microphones. A dual-LED VU meter displays the level for each input to facilitate selection of the ideal gain range. P48 phantom voltage is supplied to each microphone input. The SF-XMN4 is a professional grade product with discrete mic preamplifiers...

      Free Ship Banner

      Read More

      Item #: RDL-SF-XMN4

      Availability: Usually ships in 3-10 business days

      Our Price: $815.27

      Add to Wishlist
    • 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...

      Free Ship Banner

      Read More

      Item #: HR-ADC1

      Availability: Usually ships in 3-10 business days

      Our Price: $631.79

      Add to Wishlist
    • 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...

      Free Ship Banner

      Read More

      Item #: STM-3

      Availability: Usually ships in 3-10 business days

      Our Price: $165.94

      Add to Wishlist
     

    Page:

    ►►
      ◄◄
       
       
       
       

      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.

       
      Please fill out the information below
      Email Address*