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TROUBLESHOOTING
Symptom
No sound
Likely Cause
What to do
Speaker not connected to
amplifier
Verify that speaker is connectedand that
the amp is on
Speaker cable is faulty or
improperly connected.
NO sound. Speaker comes on.
Signal sounds distorted and very
loud.
Signal sounds distorted even at
moderate volumes.
Signal source(mixer, instrument,
etc.) Is not sending a signal.
Faulty cables and connections
Excessive input signal, trying to
exceed the capabilities of the
speakers
Mixer or other source is
overdriven
Re-seat the cable at both ends.
Substitute a known-good cable
Check VU meters on the source mixer
Verify that the tape or CD is playing.
Use headphones to verify that the
instrument is actually sending an
audio signal
Disconnect and re-seat signal cables.
Replace suspected cable with a
known-good cable
Turn down the level controls on the
amplifier.
Use additional speakers.
Review the Owner's Manual for your
mixer and adjust controls as needed.
Input sensitivity (gain)
Channel faders
Master faders
PPHP1594 PPHP1595
3
TROUBLESHOOTING
Noise or hiss heard at output
Noisy source device
Disconnect the devices that are connected
to your speaker one at a time. If the noise
goes away, the problem is with the source
or the connecting cable.
Speakers feed back and howl when
the microphone volume is turned up
Microphones are pointed into the
speakers
Equalizer settings art incorrect
Excessive gain
Move the speakers so they do not point
the microphone's pickup pattern.
Locate the feedback frequency and reduce
it using an equalizer.
Reduce the gain at the mixer and move the
microphone closer to the sound source.