Commercial Audio Electronics

The EZ-ADA4 Stereo Audio Distribution Amplifier is a stereo audio distribution amplifier with gain adjustment and audio level metering. The input is connected through RCA jacks or a MINI jack. A front-panel knob adjusts for high or low input levels using the left and right channel LED VU meters.

The RDL EZ-MPA1 is a microphone preamplifier with front-panel volume control and audio level metering. A front-panel switch engages an audio compressor to control overloads and clipping during high level audio bursts or peaks from the microphone.

The RDL FP-MP1 Studio Quality Microphone Preamplifier is the ideal choice in most applications where mic to line preamplification is desired. Power connections are made using either the full-size barrier block terminals or a dc power jack located in one end panel.

The RDL 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.

The RDL TX-TPR3A is a three-pair audio receiving module compatible with RDL Format-A twisted pair products. Three outputs are provided corresponding to the three signal pairs A, B and C. The audio signal received on each pair of the RJ45 INPUT jack feeds the corresponding -10 dBV unbalanced RCA phono jack output.

The RDL ST-RX2 has a single line‑level audio input and two line‑level audio outputs and is part of a group of products in the STICK-ON series from Radio Design Labs. The durable bottom adhesive permits quick, permanent or removable mounting nearly anywhere or it may be used with RDL racking accessories.

The RDL STM-1 is a low-cost quality microphone preamplifier designed for use in commercial sound and broadcast applications. The compact size makes it ideal where a larger or heavier preamp cannot be used.

The RDL STA-1M allows bridging any audio line, adjusting the gain, and driving a balanced or unbalanced line.

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.

The RDL STM-DA3 is designed for use in quality commercial sound, broadcast and recording applications and accepts a wide variety of microphone input levels without loading professional low impedance microphones.

The RDL 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 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.

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.

The RDL RU-ADA4D is a four channel stereo audio distribution amplifier with input and output gain adjustments and input level metering and may be operated in mono to provide up to eight distributed mono signals.

The RDL FP-MR2 is a message repeater that permits electronic storage of a single recording up to one minute and forty seconds in duration. This message may be played back manually using an external contact closure to ground or using the front-panel START button.