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Operation/Installation Manual
4
English
• Output Mode Selector Switch: CH 1/2 and CH 3/4 (APX490M only)
STEREO:
Full left and right stereo operation.
CH 1Mono / CH 2 Mono:
Single channel input for bridged operation. This is
especially useful in high-powered systems. (Uses CH 2 and CH 4 inputs.)
CH 1/2 Mono / CH 3/4 Mono:
Allows for a stereo input to be summed into a mono
output.
• CH 1/2 FREQ / CH 3/4 FREQ (APX490M only) The CH 1/2 crossover frequencies
are adjustable from 55Hz to 550Hz. While CH 3/4 crossover frequencies are
adjustable from 55Hz to 5500Hz (via the Frequency Range Multiplier) for a wider
range of crossover points. Use this feature along with your speaker
manufacturer's recommended crossover frequencies to quickly design a more
advanced system.
NOTE: If either of the Crossover Mode Switches is set to OFF, varying the
frequency control will have no effect.
• CH 1/2 Filter / CH 3/4 Filter (APX490M only) A filter is activated by sliding the CH
1/2 and CH 3/4 filter switch to either HP = High Pass or LP = Low Pass. CH 1/2 is
fully adjustable from 55-550Hz (via CH 1/2 Freq) and CH 3/4 is fully adjustable
from 55-5500Hz (via CH 3/4 Frequency and Frequency Range Multiplier). Use
this feature along with your speaker manufacture's recommended crossover
frequencies to design a more advanced system.
CONNECTIONS FOR POWER AND SPEAKERS
The rear panel of the APX490M and APX290M contains power and speaker
connections as shown below.
Fig. 2
APX490M
1 2
7 8
3 4 5 6
1. CH1 Speaker Output
2. CH2 Speaker Output
3. Ground
4. Remote Turn-on
5. Battery +12V Input
6. 2 - 35 Amp Fuse
7. CH3 Speaker Output
8. CH4 Speaker Output
APX280M APX490M manual.qxd 2/6/2008 11:38 AM Page 5