Instruction manual

AMS-1027 AMPLIFIED SPEAKER STATION
2-2
ELECTRICAL INTERFERENCE
As with any audio equipment, maximum immunity from electrical interference
requires the use of balanced, shielded cable; however, satisfactory results can
sometimes be obtained without it. The internal circuitry common is connected
to the chassis. Unbalanced sources may also be applied to the balanced inputs.
The gain is 6 dB greater with a single-ended source connected across both “hot”
terminals than when connected between either pin 2 or 3 and common. Note
that the unused input terminal of a balanced input should be connected to
common, rather than being left floating, to insure best immunity to noise.
AC POWER
The unit's AC mains connection is via a standard IEC inlet, with safety ground
connected directly to the unit's chassis. The universal AC input (100-240VAC,
50/60Hz) switching power supply is a self-resetting sealed type, with automatic
over-voltage and over-current shutdown. There is no user-replaceable fuse in
either the primary or secondary circuit.