To start off, my system is a JL Audio W3v3 in a JL High Output wedge enclosure. Powered by a Hifonics Brutus BRX1100.1D amp. My sub is wired at 2 ohms and runs at 500 RMS, while my amp is capable of 800 RMS @ 2 ohms. So to ensure that I don't blow my sub, I have to set my gain carefully. To do that I followed the directions given by Kyle Duffy at Sonic Electronix:
http://knowledge.sonicelectronix.com/car-audio-and-video/car-amplifiers/how-to-adjust-amplifier-gains-using-a-digital-multi-meter.html
After setting the Gain your left with; phase, bass EQ, subsonic filter, and low pass filter. When it comes to setting the filters, it depends on the kind of music that you listen to as well as personal preference. The low pass filter acts as a ceiling, and subsonic as a floor for the bass frequencies. Meaning the sub won't hit notes that are above the low pass filter or below the subsonic filter. I listen to mostly Rap and Trap music so I have my filters set around 120Hz and 27Hz. Bass EQ or Bass Boost really just turns up your gain, be careful not to turn that up to high, unless your sub can handle it. I'm not exactly sure what the phase knob does, i've messed with it and it's really hard to notice a difference in the sound of the bass.
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