is one of my subs blown

[13sldr]

i just got a new amp for my 15s and it works great, maybe too good

the max RMS on the subs are 500 4ohms and the amp is 900 so each sub is getting 450 at 2 ohms and 370 at 4 ohms

i was just sitting around listing to my music and i wanted to get out and check my subs, so i truned down the music first just to make sure every thing was good be for i truned it back up, one of my subs was hitting really diffrent to my other sub, if any one you know the song 2step by Unk, that is the song i had on, and when it got to the lower bass the sub would just hit then back off then hit again then back off again, and the other sub would hit and keep vibrating and then hit and keep vibrating.

what is wrong with my sub?

 

[aznboi3644]

we need to know EVERYTHING.

what subs??

what coils??

what amplifer??

How are they wired??

How is your gain set?? In relation to the head unit???

Bass boost??

what voltage is the amp seeing at full tilt.

Also just because the amp is rated at 900 watts doesn't mean its putting out exactly 900 watts...depends on how the gain is set and the input voltage...also impedance rise is a factor.

My guess is clipping

 

[13sldr]

both the subs and amp are made by SPL and the amp is 900wRMS srry.

subs are dual voice coil

amp is 2 chanel

the subs are bridged

i have a knob for the bass and it is turned up all the way

 

[13sldr]

if the gain is the same as level, then i have that set to 9/10 of the way up

and as far as relation to the head unit, i dont know

 

[aznboi3644]

you still aren't fully answering questions.

we need make AND MODELS of subs and amps.

also as for the gain and boost levels....9/10ths the way up is pretty high

Again how are the subs wired?? what is your final load??

Seems to me you know very little about wiring...We can't help you if we don't know what amp you have...please be very specific

 

[Donner]

Some assumptions...

we need to know EVERYTHING.

what subs??

what coils??

what amplifer??

How are they wired??

How is your gain set?? In relation to the head unit???

Bass boost??

what voltage is the amp seeing at full tilt.

Also just because the amp is rated at 900 watts doesn't mean its putting out exactly 900 watts...depends on how the gain is set and the input voltage...also impedance rise is a factor.

My guess is clipping

you still aren't fully answering questions.

we need make AND MODELS of subs and amps.

also as for the gain and boost levels....9/10ths the way up is pretty high

Again how are the subs wired?? what is your final load??

Seems to me you know very little about wiring...We can't help you if we don't know what amp you have...please be very specific

If you could provide some basic information on what a blown sub would be like, that might help. If the poster doesn't know all of that information, some generalities might be useful. For example:

1. Have the amp tested at store x.
2. and the other info you provided is fine, but if they can't answer all of your questions, then testing at a store will help.

 

[Infinity08]

If you have the gains at 90% and the bass knob turned all the way up, my next paycheck says you clipped the **** out of that amp and nuked a voice coil. Purchase a new sub, and come back here to find out how to properly set the gains. In the configuration you mention, a decent "900 rms" amp could put out as much as 3600 watts of pure square-wave distortion. That's bad news.

 

[Donner]

for those of us...

If you have the gains at 90% and the bass knob turned all the way up, my next paycheck says you clipped the **** out of that amp and nuked a voice coil. Purchase a new sub, and come back here to find out how to properly set the gains. In the configuration you mention, a decent "900 rms" amp could put out as much as 3600 watts of pure square-wave distortion. That's bad news.

Well, like if the amp is clipped (I assume that means damaged), why buy a new sub? Are they both damaged? Thanks!

 

[Turdle]

Well, like if the amp is clipped (I assume that means damaged), why buy a new sub? Are they both damaged? Thanks!

I think he meant the amp was overdriven-this induces "clipping" or square wave distortion. Meaning the peaks of the signal are "clipped off" by the amp not keeping up. This causes excessive heat to go to the voice coil. Gains should never be set above 60%.
It's kind of like a toaster-yeah you can turn it up enough to make your bread black-but why would you?

 

[Donner]

I see, so nuking a voice coil is not destroying it, it just needs to be properly adjusted - it's salvageable.

 

[Turdle]

I see, so nuking a voice coil is not destroying it, it just needs to be properly adjusted - it's salvageable.

No-
nuking a voice coil is destroying it-
they can be damaged without being "blown"

 

[13sldr]

the amp is brand new

as far as the gain being up to 90%, back when i first got my system and i had the 1200W amp, after about a month, i was taking a conner and then subs stop hitting as hard, so i asked around and one of my moms friends told me to trun up the gain but not all the way. so i had it set there. then i got this new amp and i hooked it up, it was barly hitting so i checked all the wires and then i checked the gain and it was set to pretty low so i truned it and it was hitting like it should.

and since my amp is two chanel, were the first sub is to be hooked up to, i have the +s and were the second sub is to be hooked up i have the -s

if i am clipping then why is one subs coil being destroyed and not the others

 

[Turdle]

I could wire up 2 light bulbs to a vari-ac transformer and crank up the power-one bulb will pop before the other-more often than not-

 

[Charlie]

It's kind of like a toaster-yeah you can turn it up enough to make your bread black-but why would you?

Awesome example! I'm keepin that one

 

[Letsride]

Listen......right off the bat you need to start over. As said before I can bet the voice coils are damaged on that sub. You also have a possible wiring problem if as you put it when you first installed the new amp it was not hitting hard. To properly set amp gains you need either an o-scope or a Volt meter and some basic ohm's law knowledge to set it up right.