Lanzar VIBE286 - Manual (Page 9)

V i b e r a n t O w n e r ’ s M a n u a l - 1 5
Notes
V i b e r a n t O w n e r ’ s M a n u a l 1 4 -
Tr o u b l e s h o ot i n g
STOP
YES! NO!
2 -c hannel A m p l i f i e r
(Operating in Stereo)
4 ohm
4 ohm
Two 4-ohm speakers, wired in stereo,
will present a 4-ohm load to each
channel of the amplifier. Most two-
channel amplifiers will work well in this
configuration. Two 4-ohm speakers, wired in parallel
to a bridged two-channel amplifier.
will present a 2-ohm mono load to the
amplifier.
MOST TWO-CHANNEL
AMPLIFIERS DO NOT SUPPORT 2-OHM
MONO OPERATION! AMPLIFIER DAMAGE
COULD RESULT! s ound a round, I nc.
1600 63rd street. brooklyn. ny 11204
4 ohm
4 ohm
2 -c hannel A m p l i f i e r
(Operating in
Bridged Mono)
STOP
YES! NO!
Four 4-ohm speakers, wired in stereo,
will present a 4-ohm load to each
channel of the amplifier. Most four-
channel amplifiers will work well in this
configuration. Four 4-ohm speakers, wired in parallel
to a bridged four-channel amplifier,
will present a 4-ohm mono load to the
amplifier.
MOST FOUR-CHANNEL
AMPLIFIERS DO NOT SUPPORT 2-OHM
MONO OPERATION! AMPLIFIER DAMAGE
COULD RESULT!
4 -c hannel A m p l i f i e r
(Operating in
Bridged Mono)
4 ohm
4 ohm
4 ohm
4 ohm
4 -c hannel A m p l i f i e r
(Operating in Stereo)
4 ohm
4 ohm
4 ohm
4 ohm
H i g h H i s s O r E n g i n e N o i s e ( A lt e r n ato r Wh i n e ) I n S pe a k e r s .
• Disconnect all RCA inputs to the amplifier(s)-if hiss/noise disappears, then plug in the component driving the amplifier and unplug its
inputs. If hiss/noise disappears, go on until the faulty/noisy component is found.
• It is best to set the amplifier's input level as low as possible. The best subjective S/N ratio is obtainable this way. Try to drive as high a
signal level from the head unit as possible.
Pr ot ec t i o n L e d Co m e s O n Wh e n Th e A m pl i f i e r I s P owe r e d U p
• Check for shorts on speaker leads.
• Check that the volume control on the head unit is turned down low.
• Remove speaker leads, and reset the amplifier. If the Protection LED still comes on, then the amplifier is faulty.
A m pl i f i e r ( S ) G e ts Ve ry H ot
• Check that the minimum speaker impedance for that model is correct.
• Check for speaker shorts.
• Check that there is good airflow around the amplifier. In some appliciations, an external cooling fan may be required.
D i sto rt e d S o u n d
• Check that the level control(s) is set to match the signal level of the head unit.
• Check that all crossover frequencies have been properly set.
• Check for shorts on the speaker leads.
H i g h S q u e a l N o i s e Fr o m S pe a k e r s
• This is almost always caused by a poorly-grounded RCA patch cord.