Protect Light problem

No. The LED should be off when the radio is off (amp turns off as well)

It sounds like you have constant 12volts applied to your remote turn on lead. The amplifier will have 3 connections for power:

1. 12volt constant
2. chassis ground
3. 12volt switched power - this wire should come directly from your head unit. It only sends 12 volts when the radio is on allowing to amp to power up only when the radio is on.

you should not have any spark from your ground...you may want check and make sure your ground is properly installed. Try wiring the amp without the cap and see if that works.

there might be a losse hair in where the amp connects to all the wireing just take them all off and make shorter connectionts and screw it in tight

take the positive on the sub and run a wire to the other positive the run a negative to the other negative then to your pos and neg on the box do the same on the other side then tie your two positives and two neg together and you got 1ohm and that amp willl handle it all day

Possibly you need to return the amp and get a new one cause that could mean an internal problem and its deffective, you could try replacing the fuses or try changing the ground wire, this problem is very unusual

set the lp filter to about 100 to 125 (or lower if want seep boomy only) , put the bass eq no more than 75% but i would recommend no more than 50%, gain is to match the sound not to adjust power with so it is a user preference start all the way down and slowly go up till u hear distortion then turn it back down by about 10 - 15 %, phase shoild typically be at 0 degrees, subsonic depends on if you r using sealed or ported ported turn it all the way down then adjust as needed to get rid of the lower sounds you dont want (muddy sloppy sounding bass) if sealed turn it all the way up to at least 35 hz.

u need at least another amp and set em at 2 ohm and then just take it to a shop aand ask thee guy to equalize it he shouldnt charge u or at least 10 bucks

Hello, i have a hifonics brutus also, in the manual it states to set the eq at half way, so that there is no clipping or at least to prevent clipping , the eq will make the bass punchier, if you do go pass half way, i would recommend to readjust your gain settings, also check your head unit settings and make sure everything is flat, bass, mid bass etc. example i had my eq past half but i had my gain at mid way, it was hitting hard, then i tried turning the eq all the way down and the turning up the gain and the bass was smoother so it depends where you set it, and what settings you have on your head unit tone control (bass, treble etc)

to it sound good to you good luck

Have you confirmed that you have a good signal feeding the amp?

Have you confirmed that the speakers are in good working order and don't have any breaks in the wiring?