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5
Ventilation
Adequate ventilation extends the trouble-free life of
the MC3500. Always allow air to flow through the
ventilation holes on the bottom of the amplifier and a
means for the warm air to escape at the top. Refer to
figure 6.
Allow at least 19 inches (48.3cm) above the top; 6
inches (15.2cm) for the Front, Rear and Sides; allow
7/8 inch (2.2cm) below the Power Amplifier so airflow
is not obstructed.
Screw
Hot Surface Tag
POWER
TRANSFORMER
UNITY COUPLED
OUTPUT
TRANSFORMER
YL
BR
YL
WH
BL
RD
BL
BL +8Ω
YL +4Ω
RD +2Ω
BK COM
POWER 350W
FREQUENCY
15-100kHz
VI
OR
VI
WH WH
MC 3500
TUBE POWER AMPLIFIER
Precision Performance By
DYNAMIC HEADROOM
2.4dB
FREQUENCY
RESPONSE
+ 0, -0.5d B fro m 20 Hz to 20,000Hz
+ 0, -3.0d B fro m 10 Hz to 70,000Hz
A-WEIGHTE D SIGNA L T ONOIS ERATIO
1
20dB
below
rated
output
TOTAL
HARMONIC
DISTORTION
0.3% maximu m harmo nicdistort ion at
any level from 250 mW to rated power output
INPUT SENSITIVITY
1
.9 vol tsunbalanced
3.8 vol ts balanced
POWER OUTPUT
350 watts into an 8, 4 or 2 ohm load is the
minimum sine wave continuous average power
output
McIn tosh Lab orat ory Inc. , Bi ngha mton , Ne w York , U. S.A.
BK
BK
GY
VI
WH
WH
RD
YL
RD
BL
GR
BL
OR
BK
VI
GY
PRI 1
PRI 2
SEC 1
HIGH
VOLTAGE
TCO
SEC 2
HEATERS
Metal Tube Cover
FUSE
PUSH
PUSH
BALANCED UNBALANCED
INPUTS OUTPUTS
POWER
CONTROL
IN
OUT
MC 350 0 TU BE A MP LIF IE R
McINTOSH LABORATORY, INC., BINGHAMTON, NY
HANDCRAFTED IN USA WITH US AND IMPORTED PARTS
BALANCED UNBALANCED
AUTO OFF
INPUT MODE
ENABLED DISABLED
BALANCED UNBALANCED
120V 50
/
60Hz
6 AMPS
T8AL 250V
Cool Air
Warm Air
Figure 5
Figure 6
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