we have a problem

[PepsiFiend69 10+ year member]

so was messing around with my system today, and i was listennign to a song at high volume, and the bass line just got stuck. there is no other way to explain it, it continued to play the same frequency of bass untill i tuned off my head unit. is the an amp problem? a wiring problem? it doesnt do it unless i have the volume all the way up. i messed with a few things today; the LPF, Sub sonic filter, power cable, and how i have my subs wired into my amp, i think that may be the problem how i had them wired in. has anyone else had this problem? i dont want to have to replace my amp, i just dropped 200 into a head unit.someone please help.

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[stones 10+ year member]

That sounds like a H/U problem, somthing with the laser getting stuck.

 

[PepsiFiend69 10+ year member]

i jsut replaced my head unit today, i had a sony, and it did it, i just assumed that was it. but i got a new headunit today and it still does it

 

[PepsiFiend69 10+ year member]

anyone?

 

[imaspaceguy90 10+ year member]

prolly the amp but idk why, but i dont think it would be the subs.

 

[toaster 10+ year member]

you have a shorted patch chord (rca cables).

well, either that, or the rca input on your amp has come ungrounded.

 

[PepsiFiend69 10+ year member]

is there any way that can be fixed? and i will run new rca cables and see if that fixes it

 

[toaster 10+ year member]

new rcas should fix it. if it doesnt, take your amp apart and check where the rca inputs onto the board.

lemme know.

 

[PepsiFiend69 10+ year member]

ran new RCA's. Sounds better than it ever had before. definately solved the problem.

 

[PepsiFiend69 10+ year member]

ok i fixed that, now i have this problem; i upgraded my sony headunit for an alpine one, got everything hooked up, turned it on, and much to my suprise, my subs dont hit nearly half as hard as they used to, i have the bass about halfway up and sub all the way up, i didnt touch anything on my amp, but it sounds like its not getting as much power as it was. can anyone help me out? system is in the sig. thanks.

 

[tRiGgEr 5,000+ posts]

You have to reset your gains when you switch head units. They have different Pre out voltage...

Yes even if they are both 4v pre outs, they are different.

 

[PepsiFiend69 10+ year member]

ohhh. but the gain is already almost all the way up.

 

[tRiGgEr 5,000+ posts]

ohhh. but the gain is already almost all the way up.

You still have to set it regardless...

Make sure the sub level on the HU is up and make sure both RCA connections are plugged in and working.

 

[toaster 10+ year member]

yep, the new alpine you have has less pre out voltage, dunno if it can be fixed with simple gain adjustment or not- may need a line driver/preamp.

glad i could help with your rca problem, however!

 

[iltoivfe 10+ year member]

what model alpine is it?

is that "MX" (Media Expander) function on?

i had the same problem.. there wasnt a lot of bass and when i turned it on.. my subs pounded