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4
Unpacking the MC3500
WA R NING: To prevent damage to the MC3500
Vacuum Tubes during shipping, there is a
special foam insert surrounding the Vacuum
Tubes of the Power Amplifier.
The Foam Insert must be removed from the
MC3500 before connecting the AC Power
Supply Cord to the Power Amplifier.
Failure to do so is a Fire Hazard, which could
result in damage to the MC3500 and the
surrounding environment.
Follow these instructions for removal of the
packing foam before connecting the AC Power
Supply Cord to the MC3500.
In order to remove the foam insert surrounding the
Vacuum Tubes on the MC3500, it is necessary to
temporarily remove the Tube Cover. After the foam
insert is removed, the Tube Cover must be reinstalled
for proper and safe operation of the MC3500 Power
Amplifier. The Tube Cover provides protection from
the hazardous voltages inside the MC3500. The
MC3500 has no user serviceable parts, including the
Vacuum Tubes. If repairs are needed, they must be
performed by an authorized McIntosh Service Agency.
1. Orient the MC3500 so the rear of the Power
Amplifier is facing you and remove the Warning
Sheet. Refer to figure 1.
2. Remove the four screws and the two Hot Surface
Tags located on the top of the Tube Cover by using
a #2 Phillips Head Screw Driver. Refer to figure 1.
3. Place the Tube Cover, Hot Surface Tags, and
screws in a safe location, as the Tube Cover will
be reinstalled.
4. Carefully lift up and remove the Tube Cover from
the MC3500. Refer to figure 2.
5. Carefully lift up and remove the Foam Insert from
the MC3500, exposing the Vacuum Tubes. Refer
to figures 3 and 4.
6. Carefully place the Tube Cover back on the
MC3500.
7. Place the Hot Surface Tags in the top corners of
the Tube Cover. Secure the Cover to the MC3500
Chassis using the four screws. Refer to figure 5.
Note: Save the Foam Insert and Warning Sheet with the
MC3500 Shipping Carton for future use.
EL 509 SEL 509 S
EL 509 S
EL 509 S
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
EL 509 SEL 509 S
EL 509 S
EL 509 S
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
EL 509 SEL 509 S
EL 509 S
EL 509 S
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
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 LT 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
TO AVOID A FIRE HAZARD, THE FOAM INSERT
OVER THE VACUUM TUBES MUST BE REMOVED
PRIOR TO CONNECTING THE AC POWER CORD
AND OPERATING THIS PRODUCT.
WARNING
REFER TO THE OWNER’S
MANUAL FOR INSTRUCTIONS.
Shipping
Foam
Hot Surface Tag
Metal Tube Cover
Warning Sheet
Screws
Figure 1
Figure 2
Figure 3
Figure 4
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