McIntosh C 24 Brochure

Page 1

THE SOLID STATE PREAIVIPLIFIER
ALL OTHER SOLID STATE PREAMILIFIERS HAVE

TRIED TO BE...

voww

Two years of research brings you the pre-
amplifier that makes distortion 3 thing of the
past. The McIntosh C 24 solid state preampli-
fier is 99.9% perfect. '.

AUDIO magazine in the Equipment Profile
said this about low distortion in C 24:
. . . less than 0.1 percent from 20 to 20,000
cps. . . . impressive performance figures. . ."
The C 24 uses 18 silicon planar solid state
devices. Design excellence, coupled with test-
, .ing gives theC 24 its superior performance.

Like all McIntosh products the C 24 must
, meet its published specifications before it is
shipped. Each circuit, each electrical connec-
tion, each function is checked and rechecked.
Exacting McIntosh testing takes time. The
extra time invested in more and thorough
testing allows McIntosh to make an unheard
of guarantee. ,You will receive a full cash re-
_> fund of our advertised price if your C 24 fails

a Inet $29.00

to meet its specifications. No other manufac-
turer offers this money back guarantee.

I McIntosh engineering has developed new
sophisticated circuitry for maximum perform-
ance and reliability. Good engineering prac-
tices require the use of more expensive sili-
con plane transistors. Careful attention to
details is standard at McIntosh. This care
gives the C 24 the best dynamic range of any
solid state preamplifier." Your music will

never sound harsh or distorted from input

overload.

McIntosh offers you three years of trouble
free performance. With your C 24 you are
offered a FREE THREE YEAR FACTORY SERV-
ICE CONTRACT. This means you cant pay for
the service of your C 24 for three full years!
Transportation to and from service agency
are the only limitations. 7

Page 2

ELECTRICAL SPECIFICATIONS

FREQUENCY RESPONSE: +0 -0.5 dB, 20 HZ
through 20,000 Hz.'

DlSTORTlON: Less than 0.1 % at 2.5 volts output, 20
HZ through 20,000 Hz; Less than 0.3% at 10 volts
output, 20.Hz through 20,000Hz.

INPUT'SENSITIVITY AND IMPEDANCE: Auxiliary 7

Tape, Tuner, and Tape Monitor. .20 volts, 250,000

ohms for 2.5 volt output. Phono 1 and Phone 2: 2 '

millivolts 47,000 ohms. Tape Head: 2 millivolts, 1
megohm. ' '

TOTAL NOISE: High level inputs: 75 dB below rated'

output. Low level inputs: 70 dB below 10 millivoltk
input equivalent to less than 3 microvolts at input.

MAIN OUTPUTS: 2.5 volts output with rated input. _

TAPE OUTPUTS: .20 volts into 25,000 ohms with

rated input; 1. 2 volts with 10 millivolts at phono in 7

put.

LEFT PLUS RIGHT OUTPUT: 2.5 volts from generator

impedance of 10K ohms; controlled i6 dB from
normal stereo output level.

BASS CONTROLS: : 18 dB at 20 Hz, friction clutch
for independent adjustment of each channel.

TREBLE CONTROLS: :18 dB at 20,000 Hz, friction
clutch for independent adjustment of each channel.

COMP (Compensator) SWITCH: RIAA or LP phono
equalization. '

TAPE SWITCH: Normal or Tape Monitor.
LF FILTER:Flat, or 50 Hz cutoff, 12 dB per octave.

HF FILTER: Flat, or 5,000 Hz cutoff, 12 dB per oc-
tave. .

FRANCHISED DEALER

PHASE SWITCH: Normal (0) orreverse (180)

SPEAKER SWITCH: Speakers connected through back
panel terminals, ON or OFF (25 Watt load resistors

' automatically connected on power amplifier in OFF

position).
HEADPHONE JACkrFor low impedance headphones.

INPUT SELECTOR: 6 positions, AUX, TAPE, TUNER,

PHONO 1,7PHONO 2, TAPE HEAD

VMODE SE:LECTOR 7 positions, L to L and R, R to L

and R, STEREO REVERSE, STEREO, MONO (L+R),

'L+RtoL, L+RtoR.

LOUDNESS CONTOURCONTROL: Flat response, or
continuously variable bass and treblecompensation
as volume level is lowered,

SILICON-PLANAR TRANSISTOR COMPLEMENT: (18

total); 10-Q103, 7-0101, 1-Q102

POWER REQUIREMENTS: 105.125 volts AC, 60 Hz, 8
watts.

I _ MECHANICAL SPECIFICATIONS

SIZE: Front panel, 16 inches wide by 57/16 inches high;
chassis 15 inches wide by 5 inches high by 11 inches
deep, including connectors. Clearance in front of
mounting panel including knobs, 11/; inches.

WEIGHT: 17 pounds net, 25 pounds in shipping
carton.

FINISH: Anodized gold and black (front panel)