McIntosh MC3500 - Page 5

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.
HEAT TAG SCREW
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
REAR VIEW VENTILLATION
Figure 5
Figure 6