22
Equalizer Controls
The C48 Equalizer has five Frequency Controls which
will raise or lower by 12dB, the amplitude of the band
of frequencies centered at the frequency marked above
the controls. The center frequencies of these controls
are at 30Hz, 125Hz, 500Hz, 2,000Hz and 10,000Hz.
Both Left and Right Channels are affected. At the
center detent or flat position of the controls, the tone
circuit components are removed from the signal path.
The illustration to the right shows the fundamental
frequency range of acoustical musical instruments and
the human voice. It also shows the range of adjustment
of frequencies for each of the Equalizer Controls of
the C48 at the +6dB and -6dB points.
Passthru
When the C48 is connected together with a McIntosh
Multichannel A/V Control Center or Surround Decod-
er and has the PASSTHRU MODE activated, it will
automatically turn-on when the A/V Control Center
or Surround Decoder is turned On. It will indicate on
the Front Panel Alphanumeric Display “PASSTHRU”.
Refer to figure 69.
The C48 OUTPUT 1 / OUTPUT 2 Front Panel Push-
buttons are active when in the Passthru Mode. The
other of the Front Panel Controls and Push-buttons are
deactivated as long as the Passthru Mode is active
Optical and Digital Inputs
When a Digital Input (Optical or Coxial Connection)
on the C48 is selected the Front Panel Information
Display will indicate when a signal is present “2CH
How to Operate the C48, con’t
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General
Weight and Dimensions
