Electro-Voice ZXA1 Series - Troubleshooting Common Issues; No Sound Issues; Poor Low-Frequency Response

ZXA1 Series Loudspeaker Troubleshooting | en 21
Electro-Voice
User manual
2022-06 | 06 | F.01U.218.487
6 Troubleshooting
Problem Possible Cause(s) Action
1. No sound Amplifier Connect a known working signal source to the
amplifier inputs. If there is no sound, check all the
electronics are on, the signal routing is correct,
the source is active, the volume is turned up, and
so on. If there is sound, the problem is in the
wiring, or a component further up the signal
chain.
Wiring Verify you have connected the correct cables to
the amplifier. Play something at a low level
through the amplifier (for example, from a CD
player or tuner). Connect the test speaker in
parallel with the malfunctioning line. If the sound
level is 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). Using the test speaker, move down
the line and test each connection/junction until
you find the problem and correct it. Observe
proper polarity.
2. Poor low-
frequency
response with
ZXA1
WITH SUB switch
activated
Set the FULL RANGE/WITH SUB switch to the
FULL RANGE position.
3. Poor low-
frequency
response with
ZXA1-SUB
Incorrect polarity Set the NORMAL/REVERSE POLARITY to the
opposite position.
4. Intermittent
output such as
cracking or
distortion
Faulty connection
or damaged cable
Check all connections in the signal chain to
ensure they are all clean and tight. If the problem
persists, it may be in the amplifier or wiring. See
problem 1.
5. Constant noise
such as buzzing,
hissing or
humming
Defective source
or other electronic
device
If noise is present, but no program material is
playing, the likely cause is the signal chain in the
electronics. Evaluate each component as
necessary to isolate the problem.
Poor system
grounding or
ground loop
Check and correct the system grounding, as
required.
Incorrect gain
structure
Verify level controls of the source are properly
structured. Verify microphone cables are plugged
into MIC IN and line level cables are plugged into
LINE IN.