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Owner’s Manual
17
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 and
move audio cables away from power wires. Check power and ground connections on amplifi-
er and install an in-line noise filter on source unit’s power wire. Also check the alternator
and/or voltage regulator. Test for weak battery or add water to battery.
Maximum Power Output
Continuous Power Output
THD @ Rated Output (%)
Sound to Noise Ration (A wtg)
Frequency Response(+/-1dB)
Line Level Input Sensitivity
Speaker Level Input Sensitivity
Input Impedance - Low Level
High Level
Output Impedance
320
80x2
<.05%
>110dB
10Hz-50kHz
200mV-8V
400mV to 16V
12k Ohms
395 Ohms
2 Ohms Stereo
4 Ohms Bridged
640
160x2
<.05%
>110dB
10Hz-50kHz
200mV-8V
400mV to 16V
12k Ohms
395 Ohms
2 Ohms Stereo
4 Ohms Bridged
PRODUCT SPECS
MODEL APX320.2 APX640.2
PRODUCT SPECS
Maximum Power Output
Continuous Power Output
THD @Rated Output (%)
Sound to Noise Ration (A wtg)
Frequency Response (+/-1dB)
Line Level Input Sensitivity
Speaker Level Input Sensitivity
Input Impedance - Low Level
High Level
Output Impedance
640
80x4
<.05%
>110dB
10Hz-50kHz
200mV-8V
400mV to 16V
12k Ohms
395 Ohms
2 Ohms Stereo
4 Ohms Bridged
1000
250x2
<.05%
>95dB
10Hz-50kHz
200mV-8V
400mV to 16V
12k Ohms
395 Ohms
1 Ohms Stereo
2 Ohms Bridged
MODEL APX640.4 DPX1001.1
apx-dpx-update.qxp 8/18/2004 8:52 AM Page 17