Specifications

Community R2-Series Installation/Operation Manual — Page 27
SYMPTOM PROBABLE CAUSE WHAT TO DO
No Sound. Equipment is turned off. Check and make sure that all equipment in the audio signal path is
turned on. The amplifier should not be turned on until all equip-
ment before it is turned on.
No Sound. Bad or open connection. Make sure the signal and input wire connections for all connectors
in the system and to all terminal screws are properly connected or
soldered. Make sure all wire and cables are intact and not severed
or damaged.
No Sound. Crossover or all the drivers have
completely failed.
This would be an unusual cause but could occur with severe abuse
or an adverse amplifier failure. All other possibilities should be ex-
plored before assuming this is the cause. If it is, replace or repair
No sound or very low
volume.
System control is turned down. Check to make sure that the audio signal to the amplifier is high
enough to drive it properly. Check all volume/level controls and
gain switches in the system including the amplifier input attenuator.
Low volume level. System electronic gain is too low. Check to make sure that the audio signal to the amplifier is high
enough to drive it properly. Check all volume/level controls and
gain switches in the system including the amplifier input attenuator.
Low volume level. Signal or speaker wire connection
is shorted.
Make sure the signal and input wire connections inside all system
connectors are not shorted. Even one small wire strand shorting
the +/- terminals either before or after the amplifier can cause this
problem.
Volume level drops
and comes back.
The crossover protection circuits
have been activated.
This usually means that the loudspeaker is being constantly over-
driven and the crossover protection circuits are reducing the power
to the loudspeaker as a protective measure, which is normal. Re-
duce the volume level to the loudspeaker.
Sound cuts in and out. Bad connection. Check all connections and cabling for shorts or loose connections.
During high output
operation the volume
drops suddenly and
does not come back.
The crossover protection circuits
have “given up”.
This usually means that the loudspeaker was continually overdriven
for an extended period and the protection relays have “fused” in
their protect mode. The crossover must be replaced.
Distortion, low volume,
or no volume from any
or all drivers.
Cold/open solder joint on the
crossover or faulty wiring connec-
tion.
Using an ohmmeter, check the continuity of the crimp connectors,
all solder joints on the crossover and the wiring to the drivers. Also
visually inspect solder joints as cold joints may only malfunction
with higher current than an ohmmeter supplies. Repair as needed.
Distortion from the
loudspeaker at higher
volume levels.
Too little amplifier power. If the power rating of the amplifier being used is too low, it will clip
at higher volume levels. Reduce the volume level or use a more
powerful amplifier equal to the loudspeaker’s “Program” power rat-
ing.
Distortion from the
loudspeaker at higher
volume levels.
Driver is malfunctioning. Using a sine wave oscillator or wide range program at moderate
levels, listen to each driver to isolate the problem. Repair or re-
place as needed.
Low volume for the
bass frequencies.
Low frequency driver or crossover
is malfunctioning.
Using an ohmmeter, measure the resistance of the input cable
(with the amplifier disconnected). If the meter reads 4–7 ohms, one
driver may not be working. Replace as needed.
IN CASE OF DIFFICULTY