Speakers cut out at high volume

[Konstantin 10+ year member]

I just finished installing my new system and it works, unless I turn up the sound. My radio goes to 35 but it cuts out at anything from 17+.

The current setup is:

Rainbow germaniums up front

Polk Momo mmc650 in the back

alpine pdx-4.150

alpine pdx-1.600 (not hooked up yet)

radio is Kenwood Excelon x991

If I play at normal volume, it works fine. All speakers sound ok, and I have no noise/engine noise whatsoever. What does happen is that when I turn on the car and radio I hear a pop noise, could this mean a bad ground?

The amp is not going into protect mode because it as a blue light, and it doesnt blink or turn red to indicate malfunction. Also, the radio keeps playing (the song time goes on), and gives no errors.

I will try grounding the HU directly to the car tommorow. I am pretty sure everything is wired correctly since I took special care to cut the wires just the correct length to not expose any of it.

What else could I check?

Click to read more...

 

[SmokeyDog 10+ year member]

voltage

 

[Konstantin 10+ year member]

As in, gains? They are pretty low, but tommorow I will set them to minimum and see if this still happens.

The speakers dont clip at all, they just shut off.

 

[Konstantin 10+ year member]

Ok, so today I tried putting gain all the way down. Didnt work Then I regrounded my amp 3-4 times and it still made the popping noise. Regrounded the HU directly to chassis hoping it'd fix it, but no.

I ended up at the back speakers, they were causing the popping and cutting out. First I tried with the front speakers and they went to max volume without distorting nor cutting out. Once I connected only the back speakers they cut out at 24 and made the popping noise. I rewired the connections, added some wire loom (not sure of the name of this thing), connected back and voila, everything works perfect.

Gotta double check your work always.

 

[Konstantin 10+ year member]

Ok, so yesterday I went outside the city on a dirt road so there was a lot of movement and the speakers cut out again.

I dont know what the hell now, the cables for the back speakers are not touching any metal >_

What else should I check? Doesnt seem to be the grounds since once I unplug them everything works like a charm.

Edit: I have the amp set at option a, 1+3 and 2+4 channels working. I guess its the correct setting for the 4 speakers?