Connecting The Loudspeaker To The Signal Wires; Troubleshooting - Electro-Voice EVU series User Manual

Connecting the Loudspeaker to the Signal Wires

To connect the signal wires to the connector on the back of the loudspeaker, do the following:
NOTE: This procedure is not illustrated.
Tools: 3/16in.flat blade screwdriver
Loosen the + and - screws.
1.
Attach the signal wires to the appropriate + and - terminal positions on the connector.
2.
NOTE: Attach only one (1) signal wire per terminal.
Tighten the + and - screws until the signal wire is secure.
3.

Troubleshooting

Problem
No Sound
Intermittent output such
as crackling or distortion
Constant noise such as
buzzing, hissing or,
humming
If these suggestions do not solve your problem, contact your nearest Electro-Voice dealer or Electro-Voice distributor.
See "Contact Information" on page 27.
Possible Cause
Amplifier Connect a known working test loudspeaker to the amplifier
outputs. If there is no sound, check that all the electronics are on,
the signal routing is correct, the source is active, the volume is
turned up, and so on. Correct/repair/replace as necessary. If there
is sound, the problem is in the wiring.
Wiring Verify you have connected the correct wire pairs to the amplifier.
Play audio at a low level through the amplifier (for example,
from a CD player or tuner). Connect the test loudspeaker in
parallel with the malfunctioning line. If the sound level has gone
or is very weak, the line has a short in it (possibly a severe scrape,
pinch, or staple puncture). If the sound level is normal, the wire is
open (possibly a cut wire or a missed connection). Observe
proper polarity and use the test loudspeaker to move down the
line and test each connection/junction until you find the problem
and correct it.
Faulty Connection Check all connections at amplifier and speakers to ensure they
are all clean and tight. If the problem persists, it may be in the
amplifier or wiring. See Problem 1 above.
Defective amplifiers or If the noise is present but no audio is playing, the likely cause is
other electronic device the signal chain in the electronics. Evaluate each component as
necessary to isolate the problem.
Poor system grounding Check and correct the system grounding, as required.
or ground loop
Installation
Action
17