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Radio Design Labs

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    • 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

           

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          Item #: RDL-RU-ADA8D

          Availability: Usually ships in 3-10 business days

          Our Price: $370.95

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        • 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

             

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            Item #: ST-VCA3

            Availability: In Stock

            Our Price: $117.95

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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 engineered to p

                 

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                Item #: TX-J2

                Availability: In Stock

                Our Price: $57.49

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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 no


                   

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                  Item #: STA-2A

                  Availability: In Stock

                  Our Price: $145.25

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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 of

                     

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                    Item #: ST-UBA2

                    Availability: In Stock

                    Our Price: $148.95

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                  • 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 possibl

                         

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                        Item #: STM-2

                        Availability: Usually ships in 3-10 business days

                        Our Price: $139.95

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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: $24.06

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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 24

                           

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                          Item #: ST-DA3

                          Availability: In Stock

                          Our Price: $136.95

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                        • RDL RU-LB2P Line-Level Bi-Directional Network Interface - PoE

                          RDL RU-LB2P Line-Level Bi-Directional Network Interface - PoE

                          The RU-LB2 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-LB2 is a high quality converter that provides professional line-level outputs from two Dante network received audio channels. It also converts two professional or consumer line-level sources to Dante

                               

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                              Item #: RDL-RU-LB2P

                              Availability: Usually ships in 3-10 business days

                              Our Price: $459.50

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                            • RDL FP-MX3R Remote Controlled Line Level Mixer

                              RDL FP-MX3R Remote Controlled Line Level Mixer

                              The FP-MX3R is the ideal choice where a user-accessible mixer must control the volume of multiple sources. The mixer accepts balanced or unbalanced audio sources through a detachable terminal block. FP-MX3R outputs are provided in balanced and unbalanced formats. Two unbalanced outputs are available to feed the mono mixer output to a stereo amplifier input. Remote control of the mixer allows audio signals to be kept at a single equipment location. Audio is mixed by VCA circuits that are adjusted

                                   

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                                  Item #: RDL-FP-MX3R

                                  Availability: Usually ships in 3-10 business days

                                  Our Price: $289.85

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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 extern

                                     

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                                    Item #: HR-ADC1

                                    Availability: Usually ships in 3-10 business days

                                    Our Price: $607.49

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                                  • 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

                                         

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                                        Item #: RDL-RU-MLB4

                                        Availability: Usually ships in 3-10 business days

                                        Our Price: $582.20

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                                      • RDL DD-BN2ML Wall-Mounted Bi-Directional Mic/Line Dante Interface 2 x 2

                                        RDL DD-BN2ML Wall-Mounted Bi-Directional Mic/Line Dante Interface 2 x 2

                                        The DD-BN2ML is a complete wall-mounted Dante audio network interface. It features one XLR mic or line input and one mono-summed Mini-jack line input on the front panels, plus two line outputs on a rear-panel detachable terminal block. Special software is not required to configure the DD-BN2ML. The 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 lin







                                           

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                                          Item #: RDL-DD-BN2ML

                                          Availability: Direct Ship From Manufacturer

                                          Our Price: $498.96

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                                        • RDL HR-UDC1 Universal Digital Audio Converter AES/EBU - SPDIF

                                          RDL HR-UDC1 Universal Digital Audio Converter AES/EBU - SPDIF

                                          The RDL HR-UDC1 is the ideal choice in installations where digital audio signals must be converted between consumer and professional formats. The input and output support AES/EBU, S/PDIF and AES-3ID formats. The HR-UDC1 automatically detects a valid input on any of the four input jacks: S/PDIF optical, S/PDIF coaxial, AES-3ID or AES/EBU. The input is decoded, re-clocked and retransmitted to the output. All pro/consumer, emphasis, and sampling frequency bits common to both S/PDIF and AES/EBU stan

                                               

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                                              Item #: HR-UDC1

                                              Availability: Usually ships in 3-10 business days

                                              Our Price: $480.49

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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.

                                              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

                                               

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                                              Item #: ST-LCR1

                                              Availability: In Stock

                                              Our Price: $74.49

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                                            • RDL ST-TC1 Telephone System Coupler - CO Line Simulator

                                              RDL ST-TC1 Telephone System Coupler - CO Line Simulator

                                              The ST-TC1 is intended to be connected to an on-site telephone system switching unit KSU. It is NOT intended to be connected directly to a telephone CO line. Connections from the ST-TC1 go into the telephone switching unit as if the ST-TC1 was an incoming phone line.

                                              When the KSU seizes the line to the ST-TC1, a relay contact closure is provided which can be used to control a variety of equipment, such as a paging system or radio system. The closure is maintained as long as the line is seized. A

                                                 

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                                                Item #: ST-TC1

                                                Availability: In Stock

                                                Our Price: $100.95

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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 transfo

                                                   

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                                                  Item #: RDL-TX-A2D

                                                  Availability: In Stock

                                                  Our Price: $103.49

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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 b

                                                       

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                                                      Item #: RDL-RU-ADA4D

                                                      Availability: In Stock

                                                      Our Price: $241.49

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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 RU-MLA2 Dual Microphone / Line Preamplifier

                                                        RDL RU-MLA2 Dual Microphone / Line Preamplifier

                                                        The RU-MLA2 is a dual channel audio preamplifier. The inputs and outputs may be connected through the front-panel XLR jacks or on the rear panel detachable terminal blocks. Each input accepts either a balanced microphone or line level signal. Each output 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-MLA2 may be rack-mounted with the XLR jacks facing forward, or may be reverse-mounted using the R







                                                         

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                                                        Item #: RU-MLA2

                                                        Availability: Usually ships in 3-10 business days

                                                        Our Price: $256.49

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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: $699.95

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                                                        • RDL HR-DDA4 Digital Audio Distributor - 1x4

                                                          RDL HR-DDA4 Digital Audio Distributor - 1x4

                                                          The HR-DDA4 is the ideal choice in installations requiring high quality distribution of a digital audio signal. The input and each of the four outputs support AES/EBU, S/PDIF or AES-3ID formats. The HR-DDA4 automatically detects a valid input on any of the four input jacks: S/PDIF optical, S/PDIF coaxial, AES-3ID or AES/EBU. The input is decoded, reclocked and retransmitted to four individually buffered outputs. Front-panel LEDs display the digital audio format and sample rate of a valid source










                                                           

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                                                          Item #: HR-DDA4

                                                          Availability: Usually ships in 3-10 business days

                                                          Our Price: $620.95

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                                                        • RDL ST-LCR3 Logic Controlled Relay - Dual Alternate Pulse

                                                          RDL ST-LCR3 Logic Controlled Relay - Dual Alternate Pulse

                                                          The ST-LCR3 is ideally suited to applications where momentary pulses are needed from a single control signal. The module provides a momentary pulse when a logic signal at its input first becomes active. A separate momentary pulse is provided when the logic signal at the module input becomes inactive.

                                                          Two logic inputs are available on the ST-LCR3. Either of these inputs may be used. Terminal 1 is internally pulled high to +5 Vdc. This input becomes active when an external closure or open-collector

                                                             

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                                                            Item #: ST-LCR3

                                                            Availability: In Stock

                                                            Our Price: $121.49

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

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

                                                            The DDS-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 DDS-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







                                                               

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                                                              Item #: RDL-DDS-BN22

                                                              Availability: Usually ships in 3-10 business days

                                                              Our Price: $584.89

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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 termina

                                                               

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                                                              Item #: ST-SSR1

                                                              Availability: In Stock

                                                              Our Price: $103.95

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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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