Products, RDL

RDL ST-RX2
Audio Routing Switcher

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…

RDL ST-VOX1
Audio Control, Vox Relay

The ST-VOX1 is an Audio Controlled Relay in the STICK-ON® series. When used in intercom or talkback applications, the ST-VOX1 may be triggered directly from an unbalanced microphone. In many such installations the microphone or other audio source must be preamplified, making the ST-VOX1 an…

RDL HR-MCP2
Dual Channel Mic Compressor

The Radio Design Labs HR-MCP2 dual-channel microphone compressor offers full studio-quality low-noise performance at any gain setting while delivering a consistent audio output level over wide variations (up to 25 dB) in the microphone input level. Rear-panel switches let you set each output to mic…

RDL FP-PA20
Audio Power Amplifier 8 OHM Output

The FP-PA20 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. The output…

RDL ST-ACR2
Audio Control Relay

The ST-ACR2 is an Audio Controlled Relay in the STICK-ON® series. These products are designed for quick, convenient installation, and reliable operation in a variety of control applications. The ST-ACR2 is designed to switch on line level sources. Two multiturn trimmers are provided. The SENS…

RDL ST-DA3
1X3 Mono Distribution Amplifier

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…

RDL RU-MX4
4 Ch Mic/Line Mixer w/Compressor/Limiter

The RU-MX4 4-channel mic/line mixer is the ideal choice in many applications where a combination of balanced mic and/or unbalanced line-level signals needs to be mixed. Balanced connections use XLR connectors, and unbalanced signals are coupled through RCA jacks. Each of the four inputs can accept…

RDL RU-ADA4D
2X4 Stereo 1X8 Mono 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…

RDL ST-PA6
6 Watt Utility Power Amplifier

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…

RDL RU-MLA2
Dual Mic/Line Audio Pre-amp

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…

RDL RU-MLD4
1X4 Mic/Line Distribution Amp

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…

RDL HR-MP2
2 Channel Mic Preamp

The HR-MP2 is a dual channel microphone preamplifier with line-level outputs. Each section provides identical rear-panel signal connections and front-panel controls.Each preamplifier is equipped with a front-panel FILTER switch to enable or disable a 6 dB/octave low-cut filter with a -3 dB cutoff…

RDL STA-1
Interface Amplifier

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…

RDL ST-MX3
Line Level Mixer

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…

RDL FP-BUC2
Balanced to Unbalanced Converter

The FP-BUC2 is the ideal choice for connectorized conversion from balanced to unbalanced audio. This module features two identical active (transformerless) channels. Gold contact XLR jacks are utilized for the balanced input channels. Each output is unbalanced, connected through a gold-plated phono…

RDL TX-1A
Line Transformer

The TX1A provides transformer isolation between balanced line and unbalanced input, and sports a level trim pot that adjusts output 4 to 24 dB below input level. Input may be 10 k ohms bridging or 600 ohms terminated. It boasts a frequency response of 20 Hz to 20 kHz (+/- 0.5 dB) and < 0.05% (1…

RDL SM-K12
Stick On Mounting Strip

The SMK-12 allows removable surface or edge mounting of RDL Stick-Ons onto a panel with velcro fasteners. Panel attaches to surface with screws or foam adhesive pads.

RDL RU-SH1
Stereo Headphone Amp- Rack-up Series, Level Control

The RU-SH1 is a dual channel headphone amplifier that can drive high or low impedance headsets in stereo or mono. If features balanced/unbalanced left and right inputs that accept operating levels between -20 dBV and +20 dBu. It mounts in RACK-UP series rack mounts or in various RDL mounting…

RDL ST-UBA2
Interface Amplifier, Unbalanced to Balanced

The Radio Design Labs STU-BA2 two-channel interface amplifier 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…

RDL ST-OSC2B
Oscillator 100 HZ/400 HZ

Each of the ST-OSC2 products is a Dual Audio Oscillator. These products are designed for quick, convenient installation, and reliable operation in a variety of audio applications. The ST-OSC2 products feature RDL's SupplyFlex power input configuration. The module will operate directly from floating…

RDL HR-ADC1
Analog to Digital 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…

RDL STP-1
Dual Attenuator

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…

RDL TS-1D
Transient Suppressor

The TS-1D is intended to protect audio input and output circuits from the effects of transients induced on the audio lines.PS24AS power supply sold separately.Main Features:• Immunity from Electrostatic Discharge • Immunity from Induced Transient Voltage • Immunity from RF…

RDL ST-MX2
2 Channel Mic/Line Mixer

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…

RDL ST-EQ3
3 Band Equalizer

Radio Design Labs' Stick-Ons are compact, high-quality audio interface devices that can be directly and discreetly mounted on equipment, under counter tops, or combined in rack mount systems. The ST-EQ3 is a 3-band equalizer. Equalization is accomplished by three active circuits, each controlling a…