turntable on/off switch. When AC power to the turn-
table is turned on, automatically the instrument and
the SWITCHED black AC power outlets are turned
on. The system will remain on until the turntable is
turned off. The POWER ON pushbutton controls the
AC power for any source other than the turntable.
In the MANUAL position only the POWER ON
pushbutton will turn AC power on or off.
Some turntables have electronic circuits that
draw current all the time. To use these turntables the
AUTO/MANUAL switch must be in the MANUAL
position. With the AUTO/MANUAL switch in the
MANUAL position, AC power to the system will be
controlled by the front panel POWER pushbutton only.
FUSES
A 5-amp fuse protects the MA 6200 circuits. The
fuse does not protect additional equipment con-
nected to the rear panel AC power outlets. A one
amp fuse protects the turntable auto on circuit. If
this fuse fails, power to the green outlets will be in-
terrupted.
CONNECTING LOUDSPEAKERS FOR STEREO
All speakers are connected to the push connec-
tors on the rear panel. When stereo speakers have
been connected to the proper push connectors, the
corresponding front panel pushbuttons turn the
speakers on or off.
Selection of the proper gauge wire to connect the
loudspeakers preserves the quality of sound repro-
duction for which the loudspeakers have been de-
signed. If undersize wire is used, resistance is added
to the amplifier/loudspeaker combination which
adversely affects the performance. Added resis-
tance causes reduction of damping characteristics,
modification of frequency response and reduction in
power output.
Use lamp cord, bell wire, or wire with similar type
of insulation to connect the speakers to the am-
plifier. In all cases, the leads to and from the speaker
should be twin conductor or twisted together. When
using 8 ohm speakers and for the normally short
distances of under 30 feet between the amplifier and
speaker, No. 18 wire or larger can be used. For
distances over 30 feet between the amplifier and
speaker use larger diameter wire. Select the correct
size wire for the wire length from the chart. It is
recommended that the DC resistance of the speaker
leads be less than 5% of the speaker impedance. Up
to 10% can be tolerated. Resistance of the leads
should be computed for the length of wire both to
and from the speaker or speakers.
For multiple speaker operation, run separate
leads from the amplifier to the speakers.
CONNECTING ONE LOUDSPEAKER FOR MONO
The left and right outputs of the MAC 6200 must con-
nect to separate loudspeakers. Do not parallel the
output connections for a single loudspeaker. If the
left and right outputs are connected together ex-
cessive heat is generated in the power amplifiers
which causes damage even though the MODE
SELECTOR pushbutton is in the MONO position. If
you wish to drive a single loudspeaker, put the
MODE SELECTOR in MONO and connect the loud-
speaker to the left or the right speaker push connec-
tors only. It is not necessary to connect a load to the
other channel output.
CONNECTING A MclNTOSH EQUALIZER
On the JUMPER panel, remove the jumpers bet-
ween the PREAMP OUT jacks and power AMP INput
jacks. The environmental equalizer is connected bet-
ween these jacks. Use standard shielded cables.
Connect the PREAMP OUT to the input of the
equalizer. Connect the output of the equalizer to the
power AMP INput jack.
MAXIMUM WIRE LENGTHS
Wire
Gauge
22
20
18
16
14
12
10
For 4 Ohm Load
Feet
6
10
15
25
40
60
100
Meters
1.8
3.1
4.6
7.6
12.2
18.3
30.5
For 8 Ohm Load
Feet
12
20
30
50
80
120
200
Meters
3.7
6.1
9.1
15.2
24.4
36.6
66.0
Wire lengths above represent the wire resistance equal to 5%
of the speaker impedance.
6
Connect the leads from the left main loudspeaker
to the SPEAKER 1 Left and Common push connec-
tors. Connect the lead from the right main
loudspeaker to the SPEAKER 1 Right and Common
push connectors. Connect the leads from a second
left loudspeaker to the SPEAKER 2 Left and Com-
mon push connectors. Connect the lead from a se-
cond right loudspeaker to the SPEAKER 2 Right and
Common push connectors. Connect the leads from
a third left loudspeaker to the SPEAKER 3 Left and
Common push connectors. Connect the lead from a
third right loudspeaker to the SPEAKER 3 Right and
Common push connectors.
The push connector on the MA 6200 will accept up
to 16 gauge wire. When larger wire is used it will be
necessary to splice a short length of 16 gauge wire
to the ends of the heavier wire to make connections.
A similar arrangement may be required to connect at
the speakers.
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