Performance Limits - McIntosh C26 Owner's Manual

Performance Limits

Performance Limits are the maximum deviation
from perfection permitted for a Mclntosh instru-
ment. We promise you that your C 26 must be
capable of performance at or exceeding these
limits or you get your money back. Mclntosh is
the only manufacturer that makes this guarantee.
FREQUENCY RESPONSE
+0 -0.5 dB 20 Hz to 20,000 Hz
DISTORTION
Will not exceed 0.1% at rated output level, 20
Hz to 20,000 Hz
INPUT SENSITIVITY AND IMPEDANCE
AUXILIARY, TUNER, TAPE 1, TAPE 2 0.25 volts
at 250,000 ohms
HUM AND NOISE
AUXILIARY, TUNER, TAPE 1, and TAPE 2 85 dB
below rated output
PHONO 1, PHONO 2 74 dB below 10 millivolts
input, equivalent to less than 2 microvolts at
the input terminals
OUTPUT LEVEL AND IMPEDANCE
MAIN OUTPUT 2.5 volts with rated input, 200
ohms source impedance, to operate into 47,-
000 ohms or greater
TAPE OUTPUT 0.25 volts from low level inputs,
200 ohms source impedance, to operate into
47,000 ohms or greater
CENTER CHANNEL OUTPUT (L + R) 2.5 volts
with rated input to both channels, 1,200 ohms
source impedance, to operate into 47,000
ohms or greater
A level control adjusts the CENTER CHANNEL
output from -6 dB to +6 dB with respect to
MAIN output
VOLTAGE AMPLIFICATION IN DECIBELS:
AUXILIARY, TUNER, TAPE 1 and TAPE 2
to MAIN OUTPUT
to TAPE OUTPUT
PHONO 1 and PHONO 2 (at 1,000 Hz)
to MAIN OUTPUT
to TAPE OUTPUT
AC POWER OUTLETS:
1 unswitched (Red)
4 switched
20 dB
0 dB
62 dB
42 dB
POWER REQUIREMENT
120 volts, 50/60 Hz, 15 watts
FACILITIES AND FEATURES
BASS
Separate 11 position rotary switches for each
channel. -20 dB to +16 dB at 20 Hz
TREBLE
Separate 11 position rotary switches for each
channel. -20 dB to +20 dB at 20,000 Hz
LOUDNESS
Flat response, or continuously variable loudness
equalization as volume level is reduced
BALANCE
Natural balance at center position, attenuation
of left or right channel by rotating control
VOLUME
Precision "tracked" at all listening levels. (0 to
-65 dB). Does not change stereo balance as loud-
ness is changed. The AC power ON/OFF switch is
coupled with this control
INPUT
Six positions —AUXILIARY, TAPE 1, TAPE 2,
TUNER, PHONO 1, and PHONO 2
MODE
Seven positions — Left channel only to both
speakers. Right channel only to both speakers,
Stereo Reverse, Stereo, Mono, L + R, L + R to
right speaker only, and L + R to left speaker only
TAPE MONITOR
Two pushbutton switches. Either of two tape
recorders can be monitored by selecting the TAPE
1 pushbutton or TAPE 2 pushbutton. They are me-
chanically interlocked to accept only one push-
button at the IN position at one time
LF FILTER (Rumble Filter)
Flat or roll-off 6 dB per
down to 12 dB at 20 Hz
HF FILTER (Scratch Filter)
Flat or roll-off 6 dB per octave above 6,000 Hz,
down 12 dB at 20,000 Hz
12
octave below 50 Hz,