Pyle Power Sports PLUTV49BTR User Manual page 6

No Sound:
• Speaker cable or speaker plug are not connected correctly.
• The plus and minus wires of the speaker cable have contact, thus eliminate the
short circuit. If you use, pay attention only 4 ohm load speaker is allowed. No 2
ohm or less impedance speaker connection is allowed.
Poor Sound Quality (Distortions):
• The speakers are overloaded, therefore turn down the volume level and check
the volume control positions.
No Stereo Sound And A Weak Bass:
• Speaker cables (+) and (-) are mixed up, unit wired out of phase.
INTERFERENCE
All cables can source and create interference. The power cable and Cinch/RCA
audio cable are very prone to interference; the remote cables are less prone.
There is often interference caused by the generator (piping), ignition (cracking)
or other vehicle/or boat electronic parts. Most of these problems can be
eliminated by correct and careful cabling. In doing so, here are the following
guidelines:
• Use only a screened audio cable for the wiring between "low level in" of the
amplifier and RCA or DIN output of the radio.
• Lay the signal, speaker and power cables separately with enough distance from
one another and also from each other car cable. If not possible, you can lay the
circuit and ground cable together with the serial cables. Audio and speaker cable
should be as far away from these as possible. The REM cable to the automatic
antenna output of the radio can be laid together with the signal cables.
• Avoid ground loops by laying the ground wiring of all components to a center
point in a star-like way. you can find the best central point in measuring the
voltage directly at the battery. Now compare this voltage value with the chosen
ground point and the (+) terminal of the amplifier. If measured voltage is only
slightly different, you've found the correct central. Otherwise you have to look
for another point. You should measure with the ignition point for earth being
switched on and additionally switched on consumers (rear window heating and
light).
• If there are pickups from external electrical sources into the speaker cables, divide
the core leads and twist them together.
• If there are noises from the car electrics, add an interference suppression choke
into the power wiring.
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