7
XLR Inputs
The female 3-pin XLR type INPUT connector connects to the amplifier’s 10 K Ohms, electronically balanced input. It requires a 1 V signal for full rated
output. The male 3-pin XLR type looping
connector is used to loop through to additional self-powered loudspeaker amplifiers. It has straight through connections from the Input connector.
Pin 2 is hot and pin 3 is neutral. Pin 1 is chassis ground. When the amplifier is connected to a balanced source, the shield may either be lifted or connect-
ed at the source end. The choice should be made on the basis of minimum hum.
With an unbalanced source, connect the signal to pin 2 and source ground to pin 3. Connecting the signal to pin 3 is not recommended.
Note: Improper
operation results when only pin 2 or only pin 3 and pin 1 (ground) are used for an unbalanced input.
Phoenix Inputs
The Phoenix Input/Output connector provides an alternate means of bringing audio into the
loudspeaker’s amplifier and looping through to additional amplifiers.
Power LED
The Power LED indicates the status of the amplifier’s power. It turns bright green when the amplifier is turned “on”. It takes a few seconds for the LED to
reach full brilliance when the amplifier is first turned on. This is normal.
Signal Present LED
The Signal Present LED flashes to show the presence of an audio signal at any input.
Limiter LED
The Limiter LED flashes whenever the signal level triggers the amplifier’s protective limiter.
Occasional flashing indicates optimal operation.
Note: continuos illumination indicates the system is being over driven and input level should be
reduced to avoid overheating.
Attenuation Control
This control adjusts the loudspeaker’s output level. When it is turned fully clockwise, the amplifier will have its maximum voltage gain and will deliver its
rated output when driven by its rated signal.
As a general rule, setting the control in the full clockwise position provides maximum headroom; setting the control at a lower level maximizes the signal/
noise level.
Power Switch
This switch is used to turn the amplifier On or Off.
Reset Button
The Push To Reset button is a circuit breaker that acts as a protective power line fuse and automatically turns amplifier off in case of overload or electrical
fault. If it shuts off during normal use, push it back to the On position just one time.
Note: Do not attempt to operate the amplifier by holding the
switch in the On position. If it will not stay on by itself, the amplifier needs service.
