Aurex AD-4 mkII Noise Reduction System

The Aurex AD-4 mkII is a noise reduction system with Adres noise reduction, it was introduced by Aurex in 1981 and discontinued a year later.

The AD-4 mkII is equipped with.

Level meters used on the Aurex AD-4 mkII noise reduction system are analog needle VU reading meters.

The Toshiba Adres noise reduction system used in the Aurex AD-4 mkII expands the tape playback dynamic-range greatly right across the frequency range reaching an incredible 100dB at 1kHz. Signal-to-noise ratio is improved dramatically: by 30dB at 10kHz eliminating all tape hiss, and 17dB at 100Hz. To further maintain recording accuracy, the AD-4 mkII incorporates a switchable multiplex filter. When you record FM stereo broadcasts, the MPX filter of the AD-4 mkII can be swiched on to prevent the standard 19kHz FM pilot signal from interfering with the noise reduction system.

For undisturbed listening a jack connector for a pair of headphones is supplied. Connection to other audio components for plaback can be achieved by a RCA cable and recording from a source by a RCA cable.