Aiwa HR-7 Noise Reduction System

The Aiwa HR-7 is a noise reduction system with High-Com noise reduction, it was introduced by Aiwa in 1980.

The HR-7 is equipped with.

Level meters used on the Aiwa HR-7 noise reduction system are generic digital peak reading meters.

To ensure the best response from the wide variety of tapes available adjustment of, sensitivity, to optimum levels can be performed prior to recording.

The High Com system (as used in the Aiwa HR-7) works as a broadband 2:1:2 compander, achieving almost 15 dB of noise reduction for low and up to 20 dB for higher frequencies, while avoiding most of the acoustic problems observed with other high compression broadband companders. To further maintain recording accuracy, the HR-7 incorporates a switchable multiplex filter. When you record FM stereo broadcasts, the MPX filter of the HR-7 can be swiched on to prevent the standard 19kHz FM pilot signal from interfering with the noise reduction system.

Connection to other audio components for plaback can be achieved by a RCA cable and recording from a source by a RCA cable.