Operating Precautions - Crest Audio CM serie Manual Del Proprietário

Operating Precautions

Cable Length
(In Feet)
Make sure the mains voltage is correct and is the same as that printed on
the rear of the amplifier. Damage caused by connecting the amplifier to
improper AC voltage is not covered by any warranty.
Note: Always turn off and disconnect the amplifier from mains voltage
before making audio connections. Also, as an extra precaution, turn down
the attenuators before powering up.
It is always a good idea to have the gain controls turned down while
powering up to prevent speaker damage if there is a high signal level at the
inputs.Whether you buy or make them, use good-quality connections, input
cables and speaker cables, along with good soldering technique, to ensure
trouble-free operation. Most intermittent problems are caused by faulty
cables.
Consult the Wire Gauge Chart (below) to determine proper gauges for
various load impedances and cable lengths. Remember that cable impedance
robs amplifier power in two ways: power lost directly to resistance (I2R
loss), and by raising the total load impedance.
W I R E G A U G E
Stranded Wire Gauge
(AWG)
5 18
16
14
12
10
10 18
16
14
12
10
40 18
16
14
12
10
8
80 16
14
12
10
C H A R T
Power Loss into
8 Ohms (%)
.79
.50
.31
.20
.125
1.58
1.00
.62
.40
.25
8.00
4.00
2.50
1.60
1.00
.625
8.00
5.00
3.20
2.00
9
Power Loss into
4 Ohms (%)
1.58
1.00
.62
.40
.25
3.16
2.00
1.25
.80
.50
12.60
8.00
5.00
3.20
2.00
1.25
16.00
10.00
6.40
4.00