turned my car on yesterday and played my normal music in my car like usual.
the subwoofers turned out not to be working or playing as hard like they really should.

ive checked all connections to the amp including rcas from headunit and all fuses that may be blown.
everything looks to be fine and nothing is loose.

what could be causing my subs not to crank like they should be doing?

ty, ty

Do they sound like they've let go a voice coil?
It's generally easy to tell.

Maybe double check all the settings on everything, too.

They are still playing, just not as loud as before? Or not at all? Multiple subs? If both aren't working then it'll point to either an amp or head unit issue.

Is the protection light turning on on the amp?

What kind of amp? Multi channel or monoblock? If multi channel, 1 channel may be damaged, if a mono, it may be close to dead but not likely

Try unplugging 1 RCA, listen to how quiet it gets, then switch the RCA, if there is a difference in sound, 1 output channel has been damaged, but both may be damaged and this won't identify it.

Check your amp ground cable that it hasn't become loose or compromised in any way.

About the best info I can give without knowing any details.

i wouldnt know if the voice coil has let loose, but its still playing clear as day but not as loud.

im using a Kicker 400.1zx mono block with twin Kicker Comps @ 2 ohm.
and the protection light isnt coming on either.
i did a check the grounding and thats solid still.

i had however, without realising, had the amp playing on a loop.

i had however, without realising, had the amp playing on a loop.

please explain?

do you have any voltage drop at battery or amplifier?

Playing... On a loop?

Voltage drop is unlikely to cause this issue, it could only really dip low enough with the car off in which case it would likely smoke the amp anyway so you would sure as he'll know about it.

It's really just a trial and error problem.. While not ideal you could swap to a different set of RCA inputs on the headunit, just make sure low pass filters etc are in place

To test voice coils, press down right on the center of the sub, so that the pressure is even around the whole cone, and listen for scraping, this will indicate a swollen or unravelling coil. Don't push too far, and don't push with your hand to the side of the cone.

Last but not least, test with a different amp.

loop as in, had 2 sets of rcas going into it, one into the input, the other into the output.

ive got no voltage drops at all, ive tested with a multimeter.
and ive also tested the subs and they are at 2.7 ohm. (not to sure what if its spose to be dead on 2)

Maybe you have just become used to maddd SPL, and there is only one way to fix that. More powahh :)

Maybe you have just become used to maddd SPL, and there is only one way to fix that. More powahh :)

i actually thought i was the problem lol