Meyer Sound UPA-1P - Manual (Page 11)

The audio produced by the speaker is
highly compressed and the limit light is
constantly yellow.
1. Turn down the level of the input signal to the
speaker system.
Only the high or low driver seems to pro-
duce sound.
1. Make sure the audio signal is full-range and has not
been filtered in a previous stage of the signal chain.
If possible, monitor the audio source with high-
quality headphones.
2. Send the audio signal to another speaker to insure
that the signal is full-range. Turn the source level
down before reconnecting the audio input and in-
crease the level slowly to avoid a sudden blast of
sound.
3. Use a sine wave and/or pink noise generator to
send a variety of frequencies to the speaker.
There is sound but it is does not seem to
be at full power and the On/Temp. LED is
red.
This occurs in conditions where the heatsink tempera-
ture reaches 85°C (185°F), indicating that the amplifier is
thermally overloaded. The limiter threshold has dropped
to a safe level, so the audio level is reduced.
1. Make sure there is enough clearance above, below,
and behind the unit.
2. Make sure there is sufficient air flow around the
unit.
3. Avoid exposing the heatsink to direct sunlight if the
ambient temperature is high.
4. If the ambient temperature is greater than 30°C and
this condition occurs frequently, contact Meyer
Sound to order the optional Fan Kit.
See the section Amplification, Limiting, and Cooling System
on page 6 for a complete discussion about the cooling
system.
There is no sound, the On/Temp. LED is
dim or off, and the power supply fan is on
high speed.
This extremely rare event occurs when the power supply
overheats, causing a 1-2 minute interruption in operation.
The unit turns on again when the power supply has
cooled sufficiently.
1. Make sure there is at least six inches clearance be-
hind the unit.
2. Make sure there is sufficient air flow around the
unit.
See the section Amplification, Limiting, and Cooling System
on page 6 for a more information about the power supply’s
internal fan and cooling system.