Markertek - The Future of Broadcast Supply

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

Free Shipping Promo Box
details

FREE SHIPPING No Minimum Order!

SHOP MARKERTEK EVERYDAY for all of your needs. Free shipping on almost every order placed on our website.
Special order & oversized freight intensive items ship at an additional cost. Continental US orders only.
Ask about our new Economy International Shipping Options.

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 RU-MLB4 Mic/Line Bi-Directional Network Interface

      RDL RU-MLB4 Mic/Line Bi-Directional 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-le

           

          Read More

          Item #: RDL-RU-MLB4

          Availability: In Stock

          Our Price: $582.20

          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.

          Required Power Supply RDL PS24V Sold Separately

          • Quiet Switching of Condenser Microphone
          • Remote Microphone Soft‑Switching
          • Switch a Mic‑Level Source to a Mic or Line Level Output
          • Remote Toggle Swit






           

          Read More

          Item #: STM-2X

          Availability: In Stock

          Our Price: $158.49

          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.

           

          Read More

          Item #: PS24V

          Availability: In Stock

          Our Price: $24.06

          Add to Wishlist
        • 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 24

             

            Read More

            Item #: ST-DA3

            Availability: In Stock

            Our Price: $136.95

            Add to Wishlist
          • 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

               

              Read More

              Item #: ST-MX2

              Availability: In Stock

              Our Price: $132.49

              Add to Wishlist
            • Radio Design Labs RU-ADA8D 8 Channel Stereo Audio Distribution Amplifier

              Radio Design Labs RU-ADA8D 8 Channel Stereo Audio Distribution Amplifier

              The RU-ADA8D is an eight 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 sixteen 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 d

                   

                  Read More

                  Item #: RDL-RU-ADA8D

                  Availability: In Stock

                  Our Price: $370.95

                  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 engineered to p

                       

                      Read More

                      Item #: TX-J2

                      Availability: In Stock

                      Our Price: $57.49

                      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.

                      Required Power Supply RDL PS24V Sold Separately

                      • Add Contacts to Any Control Signal
                      • Activation from Logic Circuits
                      • DPDT Switching Relay
                      • Open-Collector Switching
                      • Control from Switch, Button or Logic Circuits

                       

                      Read More

                      Item #: ST-LCR1

                      Availability: In Stock

                      Our Price: $74.49

                      Add to Wishlist
                    • 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.

                           

                          Read More

                          Item #: EZ-MX4L

                          Availability: In Stock

                          Our Price: $152.95

                          Add to Wishlist
                        • RDL EZ-MPA1 Stereo Output Microphone Preamplifier

                          RDL EZ-MPA1 Stereo Output Microphone Preamplifier

                          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.

                               

                              Read More

                              Item #: EZ-MPA1

                              Availability: Usually ships in 3-10 business days

                              Our Price: $143.95

                              Add to Wishlist
                            • 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

                                 

                                Read More

                                Item #: RU-ADL2

                                Availability: Usually ships in 3-10 business days

                                Our Price: $470.95

                                Add to Wishlist
                              • 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. T





                                   

                                  Read More

                                  Item #: AV-HK1

                                  Availability: In Stock

                                  Our Price: $87.49

                                  Add to Wishlist
                                • RDL ST-RX2 Audio Routing Switcher - 1x2

                                  RDL ST-RX2 Audio Routing Switcher - 1x2

                                  The ST-RX2 has a single line-level audio input and two line-level audio outputs. In the absence of a control input, the NORMAL module output is fed from the audio input. When the TRIG control terminal is connected to ground, the input audio is fed to the SELECT output and the NORMAL output is switched off. When the TRIG terminal is again disconnected from ground, then the SELECT output is turned off and the NORMAL output is fed from the input. The module contains no relays or other mechanical de

                                     

                                    Read More

                                    Item #: ST-RX2

                                    Availability: In Stock

                                    Our Price: $99.90

                                    Add to Wishlist
                                  • RDL FP-ALC2 Automatic Level Control - Stereo - RCA Jacks

                                    RDL FP-ALC2 Automatic Level Control - Stereo - RCA Jacks

                                    The FP-ALC2 is the ideal choice in many applications where consistent stereo audio levels are needed from consumer sources with varying audio output levels. Power connections are made using either the full-size barrier block or a dc power jack.

                                    The FP-ALC2 is a dual-channel (stereo) module featuring phono jack INPUTS and OUTPUTS. A single user adjustment makes installation simple and efficient. The gain adjustment is set as high as possible with the loudest source without the INPUTOVERLOAD indica

                                       

                                      Read More

                                      Item #: FP-ALC2

                                      Availability: Usually ships in 3-10 business days

                                      Our Price: $242.95

                                      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 b

                                           

                                          Read More

                                          Item #: RDL-RU-ADA4D

                                          Availability: In Stock

                                          Our Price: $241.49

                                          Add to Wishlist
                                        • RDL ST-VCA3 Voltage Controlled Amplifier

                                          RDL ST-VCA3 Voltage Controlled Amplifier

                                          The ST-VCA3 is used in applications requiring smooth audio level control from a remote control panel, potentiometer or dc voltage (0 to 10 V). Installation in series with the audio input of a power amplifier allows remote control of that amplifier's level. For installations where it is preferred to keep the audio localized in the rack, audio controls are extended outside the rack from the ST-VCA3. Many installations benefit from avoiding long-term potentiometer wear from audio running through th

                                             

                                            Read More

                                            Item #: ST-VCA3

                                            Availability: In Stock

                                            Our Price: $117.95

                                            Add to Wishlist
                                          • 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 fre

                                               

                                              Read More

                                              Item #: RU-UDA4

                                              Availability: In Stock

                                              Our Price: $167.95

                                              Add to Wishlist
                                            • 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

                                                 

                                                Read More

                                                Item #: RM-MP12A

                                                Availability: Usually ships in 3-10 business days

                                                Our Price: $699.95

                                                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.

                                                     

                                                    2 Power Supplies Available

                                                    Item #: EZ-HSX4

                                                    Availability: Usually ships in 3-10 business days

                                                    Our Price: $160.95

                                                    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 extern

                                                       

                                                      Read More

                                                      Item #: HR-ADC1

                                                      Availability: Usually ships in 3-10 business days

                                                      Our Price: $607.49

                                                      Add to Wishlist
                                                    • 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 sel

                                                         

                                                        Read More

                                                        Item #: PT-AMG2

                                                        Availability: In Stock

                                                        Our Price: $295.95

                                                        Add to Wishlist
                                                      • 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 ® may be wired to the respective wipers of a stereo 10 kΩ potentiometer to provide volume adjustment. It is r





                                                           

                                                          Read More

                                                          Item #: ST-SH2

                                                          Availability: Usually ships in 3-10 business days

                                                          Our Price: $122.49

                                                          Add to Wishlist
                                                        • RDL RU-MLB4P Mic/Line Bi-Directional Network Interface - PoE

                                                          RDL RU-MLB4P Mic/Line Bi-Directional Network Interface - PoE

                                                          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-le

                                                               

                                                              Read More

                                                              Item #: RDL-RU-MLB4P

                                                              Availability: Usually ships in 3-10 business days

                                                              Our Price: $619.90

                                                              Add to Wishlist
                                                            • 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 of

                                                                 

                                                                Read More

                                                                Item #: ST-UBA2

                                                                Availability: In Stock

                                                                Our Price: $148.95

                                                                Add to Wishlist
                                                              • 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

                                                                   

                                                                  Read More

                                                                  Item #: RU-MLD4

                                                                  Availability: Usually ships in 3-10 business days

                                                                  Our Price: $256.95

                                                                  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.

                                                                   

                                                                   

                                                                   
                                                                  Continue Shopping View Cart