McIntosh MC 2500, Owner'S Manual

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MONO LOAD
OHMS VOLTS
2 44.7
4 63.2
8 89.4
16 126.5
MONO BRIDGE OPERATION
CONNECT LOW
SIDE OF LOAD
TO TERMINALS
L1
W
L2
W
L4
W
L8
W
CONNECT HIGH
SIDE OF LOAD
TO TERMINALS
R 1
W
R2
W
R4
W
R8
W
IN BRIDGE OPERATION THE OUTPUT IS BALANCED TO
GROUND AND NEITHER OUTPUT LEAD IS AT GROUND
POTENTIAL
MONO PARALLEL OPERATION
CONNECT LOW
SIDE OF LOAD TO
MONO LOAD BOTH TERMINALS
OHMS VOLTS
1
/
2
22.4 L COM & R COM
1 31.6 L C O M & R C O M
2 44.7 L COM & R COM
4 63.2 L COM & R COM
CONNECT HIGH
SIDE OF LOAD TO
BOTH TERMINALS
L1
W
& R 1
W
L 2
W
& R 2
W
L 4
W
& R 4
W
L 8
W
& R 8
W
DO NOT OPERATE AMPLIFIER WITH MODE SWITCH IN THE
STEREO OR MONO BRIDGE POSITION WITH THE OUTPUTS
PARALLELED AS ABOVE
Figure 3 Figure 4
Monophonic operation:
When the MC 2500 is used as a monophonic or
single channel power amplifier the two channels are
combined to produce an output power of 1000 watts.
The left and right outputs must be tied together at
the appropriate load impedance taps. Figure 3
shows the connections for MONO BRIDGE opera-
tion and Figure 4 shows the connections for MONO
PARALLEL operation.
Make all speaker connections at the amplifier on-
ly. For multiple speaker operation, parallel the leads
from the speakers to the amplifier.
AC POWER
The MC 2500 is designed to operate on 120 volts
50/60 Hz. Plug the AC power cord directly into a wall
outlet. Make certain that the AC power outlet has at
least 15 ampere capacity with nothing else connec-
ted to the circuit. Do not plug the MC 2500 into an
auxiliary AC power outlet on a preamplifier or other
source equipment unless it is known there is ade-
quate current capacity. If remote power operation is
required, an external relay arrangement must be
made. If an extension cord is used make certain that
it has 15 ampere current capacity.
The MC 2500 draws 15 amperes AC line current
when amplifying music or speech at rated output on
program peaks. The amplifier uses only 0.7 ampere
while idling at no output. If the amplifier is driven to
rated output using sine wave signals it will draw 22
amperes. The MC 2500 is designed for continuous
and reliable operation at any power level to its rated
500 watts continuous average power output per
channel or 1000 watts as a mono amplifier. For con-
tinuous sine wave operation the AC source must be
capable of supplying the required 22 amperes.
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