Specifications

McINTOSH c 29
SOLID STATE
STEREO
PREAMPLIFIER
PERFORMANCE LIMITS and RATINGS
FREQUENCY RESPONSE:
+ 0 -0.5 dB 20 Hz to 20,000 Hz.
DISTORTION:
.02% maximum 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: Phono 1 and Phono 2, 2 millivolts
(1,000 Hz) at 47,000 ohms and 65 pF; Microphone,
2.5 millivolts at 500,000 ohms.
HUM AND NOISE:
Auxiliary, Tuner, Tape 1, Tape 2, IHFA 100 dB;
unweighted 90 dB below rated output. Phono 1,
Phono 2 IHFA 90 dB; unweighted 80 dB below 10
millivolts input, equivalent to less than 1.0
microvolt at the input terminals. Microphone, 1.5
microvolts at the input terminals.
OUTPUT LEVEL:
Main Output: 2.5 volts with rated input, less than
100 ohms source impedance, to operate into
10,000 ohms or greater. Tape Output: 0.25 volts
with rated input, less than 200 ohms source im-
pedance, to operate into 10,000 ohms or greater.
Headphone/Line: 0.75 volts into 8 ohm load or 2.5
volts into 600 ohm line. 47 ohms source im-
pedance, level controls provided.
VOLTAGE AMPLIFICATION:
Phono 1, Phono 2 at 1 kHz to Main Output 62 dB,
to Tape Output 42 dB, to Headphone/Line Output
72 dB. Auxiliary, Tuner, Tape 1 and Tape 2 to Main
Output 20 dB, to Tape Output 0 dB, to Head-
phone/Line Output 30 dB. Microphone to Main
Output 60 dB, to Tape Output 40 dB, to Head-
phone/Line Output 70 dB.
SEMICONDUCTOR COMPLEMENT:
9 Integrated Circuits, 2 Transistors, 11 Silicon
Diodes, 8 Light Emitting Diodes (LED), 1 Silicon
Controlled Rectifier (SCR), 1 Dual Light Depen-
dent Resistor Network (LDR).
AC POWER OUTLETS:
2 automatic current sensing (green), 4 switched
(black)
POWER REQUIREMENT:
120 volts, 50/60 Hz, 15 watts.
FACILITIES AND FEATURES
BASS:
Separate 11 position rotary switches for each
channel, +20 dB to -20 dB at 20 Hz.
TREBLE:
Separate 11 position rotary switches for each
channel. + 18 dB to - 18 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 step volume control with left to right
tracking accuracy within 1 dB through its entire
range.
INPUT:
Six positions—Auxiliary 1 and 2, Tuner, Phono 1
and 2, Microphone.
MODE:
Seven positions—Left channel only to both
speakers. Right channel only to both speakers.
Stereo Reverse, Stereo, Mono L + R to left
speaker only, and L + R to right 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.
TAPE COPY SWITCH:
Two pushbutton switches. Either of two tape
recorders can be connected to copy from tape
recorder 1 to tape recorder 2 or vice versa.
LF - HF FILTERS:
Reduce unwanted high frequency noise (above 7
kHz) and low frequency rumble etc. (below 50 Hz)
at 12 dB per octave rate.
FRONT PANEL TAPE JACKS:
Allows connection to input and output of a tape
recorder from the front panel.
HEADPHONE JACK:
For listening with either low or high impedance
dynamic stereo headphones. Power to this jack is
supplied by an amplifier in the C 29.
SPEAKER SWITCHES:
Turn Two sets of speakers on or off when properly
interconnected with the accessory Speaker Con-
trol Relay. Model SCR-2 (see page 24).
MECHANICAL
SIZE:
Front panel measures 16 inches wide (40.6 cm) by
5-7/16 inches high (13.8 cm). Chassis measures
14-3/4 inches wide (37.5 cm) by 4-13/16 inches high
(12.2 cm) by 13 inches deep (33.0 cm), including
PANLOC shelf and back panel connectors. Knob
clearance required is 1-1/4 inches (3.2 cm) in front
of the mounting panel.
FINISH:
Front panel is anodized gold and black with
special gold/teal nomenclature illumination.
CHASSIS:
Black
MOUNTING:
Mclntosh developed professional PANLOC.
WEIGHT:
21 pounds (9.5 kg) net, 33 pounds (15 kg) in ship-
ping carton.
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