Loud Crack From Bass

[ukrkoz 10+ year member]

hello everyone

I have 2000 silverado with 2way speakers in the front and OEM ones in the rear.

for several yrs, i had pioneer headunit working in it flawlessly.

i decided to sell truck and had pioneer head unit removed and OEM headunit installed back.

right after i did this, i started hearing loud crack coming from speakers at high volume. it was directly relevant to low frequencies, reducing bass removed crack.

anyhow, i am back to driving the truck. i reinstalled that pioneer headunit - same result, crack every time bass kicks in.

i just installed brand new pioneer unit - it's even worse, as it has more power. reducing volume removes crack. reducing bass does same. crack is coming from both front and rear speakers, so it's not a speaker.

front low range speakers were replaced last year with aftermarket ones. all harness wiring is done with fittings, no splicing. but it does not matter, as original GM stereo does same directly plugged.

again, it all worked great, then right after i had pioneer back to OEM stereo swap, that crack appeared - and stayed, no matter what head unit i have in. thus, i am assuming it is not headunits or harness, as it does it with both OEM stereo plugged direct and with pioneer headunits plugged via adapter harness. both pioneers work perfectly in my civic. so, it's not pioneers.

i am not aware of any capacitors or anything else that can produce cracking noise relevant to bass load anywhere in the system, but what do i know. suggestions? it's either low volume - or impossible to listen to.//content.invisioncic.com/y282845/emoticons/verymad.gif.3f39c5c2fd57527b671fad3efdfac756.gif

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[ascitiesburn69 10+ year member]

Speakers blown....You just don't notice it when there's not a lot of bass coming from them because they don't move enough to make the "crack" noise.

 

[ukrkoz 10+ year member]

ALL 4 OF THEM?

including new ones rated to 250W each?

and they blew right after i reinstalled original stereo back?

i mean, i understand one. but all four same time?

 

[ukrkoz 10+ year member]

you mean blown like in internal coil blown or whatever else they have inside? as it's like a short, discharge crack, not ripped diffuser noise. that is more of a fart, this sounds straight like spark shooting.

 

[altoncustomtech 10+ year member]

**** that is a good one..... try running speaker wire directly to the speakers from the HU..... factory amp inbetween maybe blown if it has one, seen that happen before.... if it still does it after wiring direct, well, I'm outta ideas.... lol....

 

[ukrkoz 10+ year member]

i'll try speakers from civic, she's on ice till spring time anyway.

no, it does not have any factory amp, it's a chevy truck. simple.

i'll take speakers out and inspect. i had a crack like this before, when wire leads to diffuser peeled adhesive off some, and that created a small gap between wire and diffuser, with spark shooting through. sort of like distributor spark. that made loud cracking noise every time speaker was boosted.

 

[altoncustomtech 10+ year member]

wow.... can't say I've seen that just off HU power..... seen all kinds of sparks from all over when wall socketed tho...... ehehehhe

 

[ukrkoz 10+ year member]

yep. you could actually see the gap spark. those speakers had quite a range of diffusor movement, and lead wires peeled back from diffusor attachment. every time bass will kick, it'll spark and make loud snap.

was easy fix. little bit of quick hardening resin bonded it back together. like jb weld.

btw, i found that pass side replacement speaker had lead wire touching metal speaker chassis.//content.invisioncic.com/y282845/emoticons/crazy.gif.c13912c32de98515d3142759a824dae7.gif it's a fusion 220w rated 3way, wire was from the low range component.