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APX290M/APX490M Power System Amplifier
17
English
Problem
Distorted audio.
Solution
Gain is not set properly, or damaged speaker cones. Review Setting Gain;
inspect each speaker cone for signs of damage (i.e. frozen cone, burning smell,
etc.)
Prob
lem
Audio lacks punch.
Solution
Speakers wired incorrectly, which causes cancellation of bass frequencies.
Check polarity of wires from amplifier to each speaker as defined by the
system design.
Problem
Amplifier fuse keeps blowing.
Solution
Incorrect wiring or short circuit. Review Installation and check all wiring
connections.
Problem
Whining or ticking noise in the audio with engine on.
Solution
Amplifier is picking up alternator noise or radiated noise. Turn down input
gain; move audio cables away from power wires. Check power and ground
connections on amplifier; install an in-line noise filter on source unit's power
wire; check alternator and/or voltage regulator; test for weak battery or add
water to battery.
MODEL
Frequency Response
Signal Noise Ratio
THD
Input Sensitivity
Low Level
Input Sensitivity
Speaker Level
Max. Power Output
Cont. Power Output
2-Ohm Stereo Output
Bridged Power
Dimensions
Current Consumption
at output @ max power
APX490M
20Hz ~ 20kHz
>97db
.10% all channels driven
200mV ~ 6.0V
500mV ~ 13V
720W (180 x4)
360W (90W x4) @.10% THD
165W x 4 @ .10% THD
330W x 2 @ .10% THD
2-1/8" H x 8-3/4" W x 16-1/8" L
58A @ 720 Watts
PRODUCT SPECS
APX290M
20Hz ~ 20kHz
>95db
.10% all channels driven
200mV ~ 6.0V
500mV ~ 13V
360W (180 x2)
180W (90W x2) @.10% THD
150W x 2 @ .10% THD
250W x 1 @ .10% THD
2-1/4" H x 9-1/8" W x 10-1/2" L
29A @ 382 Watts
APX280M APX490M manual.qxd 2/6/2008 11:38 AM Page 18