That head unit has a high pass filter.
here's the lowdown;
Settings: WOOFER*1 Subwoofer cutoff frequency
LOW: Frequencies lower than 55 Hz are send to the subwoofer.
MID: [Initial]; Frequencies lower than 85 Hz are send to the
subwoofer.
HIGH: Frequencies lower than 115 Hz are send to the subwoofer
Check to see if the sub is set to HIGH, this sends all frequencies below 115hz to the sub and everything above 115 to the rear speakers.
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Last edited by Rossco; 10-08-2010 at 03:15 PM.
Reason: I had one of these head units!!
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