Specifications - McIntosh MA6400 Owner's Manual

SPECIFICATIONS

it possible to select any degree of frequency response from flat, to full loudness compensation.
The overall gain of the loudness circuit is 14dB, which remains constant at mid frequencies,
regardless of the position of the loudness control. The frequency compensation increases from
the reference gain, and the desired amount of loudness compensation can be selected at any
volume control setting.
TONE CONTROL AMPLIFIER
The tone control amplifier uses high technology integrated circuit operational amplifiers. The
output stages have been optimized for optimum transient performance and minimum distortion.
Another set of operational amplifiers are arranged in a circuit configuration equivalent to series
tuned circuits. The series tuned circuits can be inserted into either the input, or the feedback
loop by means of a potentiometer. The proper choice of circuit components results in a 12dB
boost or cut at the desired bass and treble frequencies. When the tone control potentiometers
are at their center or detent positions, all tone control elements are removed from the signal path,
and the frequency response is perfectly flat.
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