Why ae my subs doing this
 

I have just installed another amp and sub into my car, have one 1500 watt polk audio (with one sub) input from stereo and output to a 1000 watt Alpine mono amp (with 2 subs).

Since i added the 1500 watt amp when i first turn on my car i hear a small bass sounding boom from the speaker. should i be worried. I know i have it wired correctly and i have 4 guage wire throughout for power and everything.



Thank-you for your help whomever answers.

4 gauge for 2500watts? i'm i reading that correct?

OK, first of all, I don't know what you are talking about with amps leading to amps or whatever.

Secondly, your problem is likely a bad ground.

Thirdly, I agree with ^^, you better have like, 3-4 runs of 4AWG for 2500w...

im guessing your mixing subs.....what you should do is try to keep your equipment along the same line...ex: alpine 1000wrms amp on 2 500wrms subs/ 1 1000wrms sub....and so on...use bigger guage wire for your setup, check your grounds, make sure there nice and tight and on bare metal. using different amps for subs isnt the best idea also...it can make your subs out of phase, give you a hard time to tune your system and it wont send equal power to your subs

I have 2 separate 4 gauge power wires from the battery in the trunk, so i am not splitting the power into both amps, so power should not be a problem :).

It may be a bad ground, but then the sub wouldn't work fine, It works perfectly fine when i have music pumping, it is just the initial small bass pump from the one speaker when the deck first turns on. . It does not do it on my Alpine subs, just the Infinity sub which i find is weird.

It sounds to me like its turn on pop. Does the amp have soft turn on? If it does and you are still getting a pop when you turn the stereo on you probably have a bad ground

Sounds like the usual turn on pop some amps have. It gets noticeably worse with people who don't have their gains set properly.

Thank-you all for the help, i will check my ground maybe make the surface cleaner (grounded right to the car like most amps).

If that does not work i will leave it, because it works fine and it is not a thud start, it is just a small turn on pop as deadlysones stated.