McIntosh C26 Service Manual

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026

PREAMPL IF [ER

SERVICE INFORMATION

STARTING WITH SERIAL no. IOPOI

McINTOSH LABORATORY INC. 2 CHAMBERS STREET BINGHAMTON, NEW YORK

9Z3

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C

26

ELECTRICAL SPECWICATIONS

FREQUENCY RESPONSE

+0 to -O.5dB from ZOHZ to 20,000Hz

DISTORTION

Less than 0.1% at 2.5 volts output, 20Hz to
20,000HZ

INPUT SENSITIVITY (phono l and phone 2)

2 millivolts for 2.5 volts output at lkHz

INPUT SENSITIVITY (aux, tape 1, tape 2, tuner)

0.25 volts for 2.5 volts output

HUM AND NOISE (phone 1 and phono 2)
7th below rated output for a 10 millivolt
input signal

HUM AND NOISE (aux, tape 1, tape 2, tuner)

85dB below rated output

OUTPUT (main)

2.5 volts with rated input. Up to 10 volts
can be developed without distortion.

OUTPUT (tape)
0.25 volts with rated input. Phono input sig-
nal of lO millivolts produces 1.2 volts output.
OUTPUT (center channel)
2.5 volts with rated input on both channels.

A level control adjusts output from -6dB
to +6dB with respect to main output.

BASS CONTROL

-20dB to +16dB at 2OHz

TREBLE CONTROL

:20dB at 20,000HZ

LF FILTER

Flat or roll off below 50Hz, down 12dB at 20Hz

HF FILTER

Flat or roll of above 5,000Hz, down l2dB at
20,000Hz