My Subs Only Twitch, whats wrong?

[galacticmonkey 5,000+ posts]

Maybe you're sending a DC signal to your speakers?

 

[DBfan187 5,000+ posts]

then the subs would be stuck in 1 direction. His keep moving in & out, so it's AC. //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif

 

[kross 10+ year member]

So it sounds like the subs are fine, since they work fine when hooked up to your friend's amp.

If you go to Radio Shack, and buy the cheapest multimeter they have (I think it's $15, digital is preferred, but analog is okay too), that will be sufficient to check the output of the amp, and also the output of the headunit. It will also be needed to properly set the gains, assuming we can get the amp working.

 

[critical 10+ year member]

Ok i just took the faceplate off the back of the amp, nothing smells or appears blown......ahhh i dono why it wouldnt work. any ideas? what am i looking for in here that might b blown or broken ?

 

[bk12321 10+ year member]

do u know exactly what a bad component would look like inside of an amp?

if u cant say for sure then dont assume, take it to someone who knows

 

[critical 10+ year member]

PROBLEM SOLVED

after 10 hours of screwing around with them...turns out to be a bad RCA cable from the sub to preouts on the deck..oh my gosh...

thanks for all your help guys!

 

[phantom240 5,000+ posts]

PROBLEM SOLVED
after 10 hours of screwing around with them...turns out to be a bad RCA cable from the sub to preouts on the deck..oh my gosh...

thanks for all your help guys!

See why I suggested RCA's?

Here's a tip my dad taught me.

When you have a bad output, make sure you have a good input. Before checking the amp, make sure you have a signal going to it. If no signal, make sure there is a signal coming from the HU. If no signal, then theres your problem.

Congrats. You got it working. Now go out and wang on those REs.

 

[critical 10+ year member]

yeahhh thanks man

they're surprisingly loud for 200watts rms or whatever they are....my bro has like 600 watts rms and these are way better quality sound and almost as loud

 

[phantom240 5,000+ posts]

Yeah. You'll find that the audible difference in power levels diminishes as you go up.

 

[XanderMoser 10+ year member]

Yeah. You'll find that the audible difference in power levels diminishes as you go up.

Yeah. You need twice as much power (or cone area) just to gain 3 db. So going from say 200 watts to 400 watts would be a noticeable difference. But going from 1000 to 1200 would be much less so. Glad you got everything working, enjoy the bass.

 

[phantom240 5,000+ posts]

Yeah. You need twice as much power (or cone area) just to gain 3 db.

This is theory. Results will vary.