My equipment has perhaps too many options for me and I could use some expert advice. Situation is that I have replaced the stock amp in my car with an Audiotec Fischer Match Up 7BMW amp/DSP unit. This has an RCA output that is connected to a Kicker DXA500.1 mono amp, which is in turn feeding an 8" Alpine Type R in a sealed box. The Kicker amp has all the usual knobs, but what is throwing me off is that the Match amplifier/DSP has tons of adjustments available for this RCA output through a Windows software application. This includes:
- a "Channel Gain and Output Level" setting that is adjustable between -30db and 5db in 0.25db increments. What is advisable here? I figure I need to first set this correctly (whatever that may mean), and then adjust the gain on the Kicker amp...?
- there are high and low pass filters, as well as a 30 band equalizer. Each band of the equalizer is further adjustable through a "Fine EQ" section that lets me adjust "db" from -15 to 6, "Hz" from 23 to 28 and "Q" from 0.5 to 15. Given that this is going to a subwoofer, my thinking is to bypass both filters and the EQ, and just use the low pass filter on the Kicker amp (which cannot be shut off). Does this make sense?
- finally, there are setting for polarity (normal or inverted) and time (0 to 425 cm). I take it that the time setting should be set to the distance between the driver's seat and the subwoofer - is that right? My understanding is that polarity should be left at 0 since my sub is installed in the enclosure in normal fashion - right?
All thoughts from the experts here would be appreciated.