subwoofer distortion help meee

[phemps 10+ year member]

i have 2 mtx jh55 12' subs in the ported box that comes from the factory. i have the kicker zx750.1 and my head unit is a pioneer deh-p5000ub and ive always had problems with my subs having this distorted crunchy sound especially with certain notes. like late night tip sounds horrible. i have tried everything to get rid of the distortion and even with the gains down low the subs dont sound like they should. at first i thought maybe my subs were distorted cause i had the kicker compvr 12's so i bought these mtx subs. is there anyway my amp could be messed ? cause i have tried everything else i swear and nothing helps at all. someone please help me!

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[jdawg 5,000+ posts]

box?

 

[phemps 10+ year member]

ahh its ported i difnt make it i just got the dual preloaded box im not sure in the cubic dimensions or anything..

 

[phemps 10+ year member]

#3 Today, 04:47 PM

phemps

Junior Member

Join Date: May 2009

Location: nazareth, pa

Posts: 2

Re: subwoofer distortion help meee

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ahh its ported i difnt make it i just got the dual preloaded box im not sure in the cubic dimensions or anything..

 

[jdawg 5,000+ posts]

well a prefab box is probably one problem, but it could be alot of things, gain too high, bass boost maxed, bass turned way up on deck, your electrical system not up to par, etc

woofers wired out of phase?

 

[cj407]

funny thing is you have the gains low....bet you the h/u eq is set to blast bass....and also eq's on both are set above sub frequencies....

 

[phemps 10+ year member]

nope these are all things people have suggested and i have changed. my bass boost is almost completely down and no bass boost at all on my head unit. and to check for correct phase i would just swap positive and negative right? that doesnt change anything either

 

[jdawg 5,000+ posts]

nope these are all things people have suggested and i have changed. my bass boost is almost completely down and no bass boost at all on my head unit. and to check for correct phase i would just swap positive and negative right? that doesnt change anything either

actually if you change the pos and neg and it doesnt sound different then something is really wrong

 

[phemps 10+ year member]

i have bass boost at zero and my sub frequency at 100 but putting it lower changes nothing at all

 

[phemps 10+ year member]

like what?

 

[jdawg 5,000+ posts]

do you have a portable mp3 player or something? hook it directly to the amp to eliminate the deck as a problem

 

[cj407]

sub freq. at 100hz.....lmao...thats mid bass...maybe take a tutorial on setting crossovers before you ask questions

 

[Villeza1 10+ year member]

Box could be rattling loose... get a custom built box.

 

[phemps 10+ year member]

nah its not the box i took the sub out and it has the same sound

 

[Villeza1 10+ year member]

Well then there's your problem...get a better amp...or check your RCA's.