So I installed my system on wednesday and Im having a problem with my bass cutting out at higher volumes. If I turn it down it comes right back. I would say it cuts out around 2/3 volume depending on the song. i also tried with the sub gain in a range of position from 0 to half with it set on the radio at the center position. I checked the amp and the blue light stays on the entire time and no other lights come on.
Heres my current setup
vehicle 09 cobalt ss
radio stock
processor/loc mtx req
sub amp sundown sae 1000
subs (2) sa-12s d4
4 gauge wire
input wires from factory subwoofer to req.
first time setup: subs wired to 1 ohm (verified on dmm), battery output at idle 14.2v, amp grounded at battery(in trunk). using auto sense on the req to supply turn on for remote. started having the problem so I checked the remote by hooking it straight up to 12 volts, that didnt help. changed the ground to chassis via seat latch (sanded to bare metal) still no change. I rewired the speakers to 4 ohms and verified with a dmm. Im still having the same problem and not sure where to go next. Should I try a plain old loc from walmart or something? I have used this amp before with no issues in another vehicle. Are there any preamplified wires I can try tapping into for signal to the req?

 

You may try grounding the AMP to the CHASSIS. Never have I heard of anyone grounding the amp to the battery. You should give that a try. My guess would definitely be its somewhere in the ground. Just make sure you find a good chassis ground.

 

i had this same problem with my setup when i had it i jumped up wire size and it stopped but seeing as u have 4 gauge wire i would assume that be big enough hmmm maybe ur amp is clipping? check the wiring on the subs for connection might be loose and high bass knocks it off the connectors?

 

i would say its the req... alot of good reviews on it but the 2 we bought sucked so bad we refunded customers money and trashed the things

 

I know you mentioned you checked your resistance levels but do they suit your amp?

Meaning, if you're running at 1 ohm is your amp 1 ohm stable? Or if you're running at 2 ohms, etc...

It sounds like a resistance issue.

 

Pretty sure all the SA amps are 1 ohm stable......so that's not the issue.

Check your voltage at the amp while you're wide open, or, in this case, right at the level before it cuts out, and see what voltage the amp is getting.

 

sundown is 1 ohm stable