SPEAKER
IMPEDANCE
IN OHMS
1 to 3
3 to 6
6 and up
AMPLIFIER OUTPUT
CONNECTIONS
+ and - 2 ohm
+ and - 4 ohm
+ and - 8 ohm
Use the Power Output Impedance connections that are appropriate for your speaker. If
your speaker is rated with a range of impedances, choose the nominal listed impedance for
connection.
Connect a cable from the speaker Common terminal to the appropriate MC1000 - (Minus),
POWER OUTPUT TERMINAL. Connect another cable to the appropriate + (Plus) POWER
OUTPUT TERMINAL.
The MC1000 output is in phase with the input signal. The Plus and Minus outputs
of all three impedance connections are balanced electrically with respect to the
amplifier chassis ground.
The actual load impedance of some speakers may drop below the specified impedance
at certain points in the audio frequency range. This will be no problem. The high current out-
put of the MC1000 will produce the extra current necessary to properly drive the speaker
under these conditions.
If the impedance of a speaker system is higher than 8 ohms, no change in the quality of
performance will occur. The available power output will simply be slightly less.
When two MC1000 amplifiers are used as a stereo pair, be sure to connect the
speakers in an identical manner to each amplifier. This is essential for keeping both
speaker systems operating in phase. This means that the driving surfaces of each
speaker system will move back and forth together. Most speakers have their hot (+)
and minus (-) or common terminals color coded. The HOT terminal is usually marked
RED.
IMPORTANT
BE SURE TO REPLACE THE PROTECTIVE SPEAKER POWER OUTPUT TERMINAL
COVER AFTER THE SPEAKERS ARE CONNECTED. THE MC1000 CAN DELIVER MORE
THAN 90 VOLTS OUTPUT FROM THE 8 OHM TERMINALS, WHICH CAN BE A SHOCK
HAZARD.
HOW TO CONNECT AC POWER
The MC1000 is designed to operate on 120 volts 50/60Hz current. Power consumption is
rated at 12 amperes UL/CSA. This current requirement applies for typical music reproduc-
tion. The MC1000 will draw greater current with steady tone test signals. Plug the MC1000
AC power cord only into a dedicated AC outlet with a 15 ampere or higher current capacity.
If a second MC1000 is used in a stereo system, it must be plugged into a separate dedicated
15 ampere AC outlet.
A built-in circuit breaker protects the internal circuits of the MC1000.
DO NOT PLUG AN MC 1000 POWER CORD INTO THE BACK PANEL AC OUTLET OF
A PREAMPLIFIER OR SIMILAR ACCESSORY.
HOW
TO
CONNECT
OUTPUTS
7
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