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Radio Design Labs

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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 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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    • 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...

       

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      Item #: RDL-RU-ADA8D

      Availability: In Stock

      Our Price: $370.95

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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...

       

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      Item #: TX-J2

      Availability: In Stock

      Our Price: $57.49

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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 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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    • 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 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-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 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 RCX-5C RCX Room Combining System Controller

      RDL RCX-5C RCX Room Combining System Controller

      The system controller accommodates a maximum of 5 rooms, combined in any adjacent arrangement. Audio inputs from each room are Line only, MICLINE dynamic mic, MICLINE condenser mic. A front-panel level knob with LED metering is provided for each room input. MUSIC and PAGING inputs may feed each room if desired. Two RCX-5Cs may be linked in larger systems where two groups of rooms need to be combined. The standard RCX-5C does not mute mics in a room while listening to music. - Power Supply Included...

       

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      Item #: RCX-5C

      Availability: Usually ships in 3-10 business days

      Our Price: $1,178.95

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    • 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...

       

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      Item #: ST-PA6

      Availability: In Stock

      Our Price: $94.49

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    • RDL ST-VP2 Automatic Ducking Module

      RDL ST-VP2 Automatic Ducking Module

      The ST‑VP2 can be wired into any line‑level input of a paging amplifier. A line‑level music source may be provided from a receiver, satellite decoder, tape or CD source. A line‑level voice source may be provided from a telephone paging system at line level, or from a microphone which has been preamplified up to line level (See RDL STM‑1, STM‑2, STM‑2X, STM‑3, STM‑LDA3 Microphone Preamplifiers). When a page is initiated, the module automatically...

       

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      Item #: ST-VP2

      Availability: Usually ships in 3-10 business days

      Our Price: $153.95

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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 possible...

       

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      Item #: STM-2

      Availability: In Stock

      Our Price: $139.95

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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 standards...

       

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      Item #: HR-UDC1

      Availability: Usually ships in 3-10 business days

      Our Price: $480.49

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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: Usually ships in 3-10 business days

      Our Price: $339.35

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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-ASX4D 4x1 Stereo Balanced Audio Switcher - Terminal Block

      RDL RU-ASX4D 4x1 Stereo Balanced Audio Switcher - Terminal Block

      The RU-ASX4D is a four channel stereo audio selector with input gain adjustments and output level metering. The inputs and outputs are connected on rear-panel detachable terminal blocks. Each of the four stereo line level inputs accepts either a balanced or an unbalanced signal. Each input is equipped with a rear panel screwdriver-adjustable input gain trimmer. Input signal levels between -15 dBV and +8 dBu may be set to the proper operating level as indicated by a stereo dual-LED VU meter. This...

       

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      Item #: RDL-RU-ASX4D

      Availability: In Stock

      Our Price: $272.75

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    • RDL ST-ACR1 Line-Level Audio Controlled Relay - 0.5 to 5 s

      RDL ST-ACR1 Line-Level Audio Controlled Relay - 0.5 to 5 s

      The ST-ACR1 is an Audio Controlled Relay in the STICK-ON series. These products are designed for quick, convenient installation, and reliable operation in a variety of control applications. The ST-ACR1 is designed to switch on line level sources. Two multiturn trimmers are provided. The SENS potentiometer adjusts the audio input sensitivity. A threshold LED facilitates accurate adjustment. The module can be set to trigger on signals between -30 dBu and 0 dBu. The DELAY control sets the time required...

       

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      Item #: ST-ACR1

      Availability: In Stock

      Our Price: $96.49

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    • RDL ST-SH2 Stereo Headphone Amplifier - Stick-On Series

      RDL ST-SH2 Stereo Headphone Amplifier - Stick-On Series

      The ST‑SH2 is used in applications requiring headphones of any impedance to be driven from consumer or professional audio sources. For fixed level installations not requiring user volume control, the ST‑SH2 is wired to the audio source and to a headphone jack. Frequently, it is desirable to mount a volume knob by the headphone jack. The LEVEL ADJUST terminals (L) and (R) may be wired to the respective wipers of a stereo 10 kΩ potentiometer to provide volume adjustment. It is recommended...

       

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      Item #: ST-SH2

      Availability: In Stock

      Our Price: $122.49

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    • RDL STP-1 Universal Audio Attenuator - 2 Channel

      RDL STP-1 Universal Audio Attenuator - 2 Channel

      The STP-1 is a pair of convenient attenuator pads that can be located at the precise location that attenuation is needed. The low-cost STP-1 eliminates the costly labor of figuring and assembling fixed pads. Multi-turn trimmers in the STP-1 permit precise adjustment of levels without the need to connect any jumpers or external resistors. The STP-1 operates in either high or low impedance, balanced or unbalanced circuits. The wiring legend is printed on the case for easy installation. Features: Audio...

       

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      Item #: STP-1

      Availability: In Stock

      Our Price: $59.49

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    • RDL RU-MX4L Pro 4-CH. Line Level Mixer Microphone & Line Output

      RDL RU-MX4L Pro 4-CH. Line Level Mixer Microphone & Line Output

      The RDL RU‑MX4L is the ideal choice in many applications where a combination of balanced and/or unbalanced line‑level signals needs to be mixed. Balanced connections use XLR connectors. Unbalanced signals are coupled through phono jacks. Each of the four RU‑MX4L inputs can accept either a balanced XLR line‑level input or an unbalanced line‑level phono jack input. The unbalanced phono jack LINE OUTPUT from one RU‑MX4L may connect to the unbalanced input of other...

       

      2 Types Available

      Item #: RU-MX4L

      Availability: Usually ships in 3-10 business days

      Our Price: $271.00

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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-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-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...

       

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      Item #: RU-MLD4

      Availability: Usually ships in 3-10 business days

      Our Price: $256.95

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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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