Amp cutting out...why?

[tmark83]

I installed a stereo my car everything is wired good all crimped connections, ferrules used on power and ground.

The issue i have is at high volumes the fullrange amp cuts out (goes into protection) when volume decreased it comes back one. At 3/4 volume it is fine only happens when I push the system or song has music that I know draws more from it. Hence the high output alternator. Once the alternator was installed is helped a bit however still happens at higher volume. System is getting clean unclipped signal positive because I gain matched with a DD-1. I belive it is due to my grounds. They measure at highest 1.8 ohm this is at the ground distribution block. Need some advice.

Info on items used below

2020 Dodge Charger

 

370 amp Tuscon Alternator

 

4/0ga knukonceptz kolossus for ground and power from alternator to connection on the firewall

 

Dual 0ga runs from firewall to battery 

 

Dual 0ga grounds for battery to chassis

 

300amp circuit breaker between battery and distribution block 

 

0ga run to distribution block from battery

 

0ga runs from distribution block to 2 amps

 

4ga run for full range amp

 

0ga grounds from 2 amp ran to distribution block

 

4ga ground from full range amp to distribution block 

 

Dual 0ga grounds from distribution block to chassis ground paint removed and dialectic grease used to mount ground lug

 

Stock headunit

PAC ap4-ch41 with toslink

MINIDSP cdsp8×12DL

Knukonceptz distribution blocks

2 Kicker kxa1200.1 

1 Kicker kxma800.4

 

 

 

[SnowDrifter]

First pass would be to shove the leads from the multi meter into the inputs on your amp and get a voltage reading there. If it's that repeatable, use a sine wave and work up the volume until it cuts out and note what the voltage drop is

I'd also look at your speaker wiring to make sure there's nothing scuffed / nicked / loose / etc

And also sanity check that gains are set properly and that you're not sending a square wave