self amplified sub not putting out much sound

I have a sound ordnance b-8pt self amplified sub, I used it in my 01, then briefly in my 2008 and it worked great, now I have wired it into my 2012, using the high pass connections, split into the rear speakers.
My ground is the only questionable thing, I sanded off a painted bolt but that would be the only thing I think isn't connected perfectly.
I tapped into the grey ignition wire on teh back of the HU for my remote wire.

Basically it's on, but barely putting out any sound, I can feel it shake a bit, but even on max it's not putting out much for sound.

any ideas?

 

K still working on this, I can put my ear to it and get a tiny bit of sound, but it seems like its trying to play the actual song, an not just bass like a sub should...

Its like a really faint speaker

 

May be a dumb question but do you have the power mode switch in high power?

 

yea I tried both to be sure

 

High pass means passing the higher frequency sounds, but you are hooking up a sub - the exact opposite.

Either there is a word use error, or else you need different wiring so that the sub is fed from a low pass (or full spectrum) connection.

 

Got a get a high low converter then use RCA s

 

I think you're right, it's the "high power input"

 

so i wanna get this fixed tonight, any thoughts?

 

i would get a multi meter and see wat voltage ur getting to that sanded bolt ur grounding it to

 

Is ur 2012 jbl?

 

nope

 

Did you get it fixed yet??

 

haven't had a chance yet. I'll check my ground tomorrow i guess