Two 15 inch strokers...what happened......video inside

[dadydolas 10+ year member]

stranger things have happened

 

[crownvicdriver 10+ year member]

First thing we did was take the speakers out to check if we had the voice coils mixed up on accident. We had everything wired right and we were using 8 gauge wire everywhere from speaker to box and from box to amp.

 

[Skip01 5,000+ posts]

Yeh they werent wired wrong....they were playing fine when they did play

Dk what it was...combination of a bunch of things maybe

 

[dadydolas 10+ year member]

if u can i would hook up a cheap woofer and give the right amount of power b4 u put another nice one in there then ull know if it was the woofer or something else and u can go down the line

i still dont know how they would have blown

ive ran garbage subs and clipped the shit out of them for months

 

[crownvicdriver 10+ year member]

how many hz is 75%

I don't know. The amp is out in his car. I will be able to tell tomorrow. And we did have both coils hooked up.

 

[crownvicdriver 10+ year member]

Oh...and from what i'm getting on paper, that box is tuned to ~41-43hz.

What formulas did you use to calculate your tuning frequency? I have the calculations from JL audio's website and I just made a excel program to enter the box size, port length, and port opening and it gives me the tuning frequency.

 

[dadydolas 10+ year member]

maybe if u were playing below the tuning of the box

but it still surprises me it would happen so quickly

even if u made all the common mistakes u still gave them alot less then max rms

now i know clipped underpowering is a killer but that's really fast

be careful b4 sticking more expensive woofers in there

 

[crownvicdriver 10+ year member]

Ok. The SSF was set to about 30Hz. I don't know how many db/octave it is.

 

[dadydolas 10+ year member]

well thats not good if the box was tuned to 43

sure that didnt help

whether it would have caused it hard to tell

hope u get it figured out man

 

[crownvicdriver 10+ year member]

Yeah. He gettin price quote from CV tomorrow for sending them off to get fixed and going sealed next time.

 

[Canaan 10+ year member]

If the gain was at 60% and the BB at 75% on that amp w/ 4volt pre-out...I will venture to guess this:

-You clipped the ever-living fvck out of that amp.

Also 20mins of square-wave will kill any sub. I have seen subs last shorter periods in the parking lot of the shop I work at. (Idiots thinking their system was 'bangin')

 

[jnralp00 10+ year member]

bass boost = bad news.... especially with your gain cranked that high.

 

[crownvicdriver 10+ year member]

so it was the bass boost that killed it? we set the gain to the recommended by the amp. the meter went from 9v to 0.5 or 0.2. I can't remember which one. And we put it in right position for 4V. preamp outputs. I guess this is a expensive lesson learned.

 

[fbi90909 5,000+ posts]

i vote bass boost had it's part in the damaging of the subs.

question though as i am not sure if it was covered or not, but what setting on the Headunits EQ did you have them at? did you have the Bass turned all the way up on the head unit? did you have the loud feature(if applicable) turned on? and to what level? what volume level on the head unit where you playing at or have the amps set at?

60% seems fine to where you had the gain set. on all the amps i have used with my HU all my gain knobs have been set to 80-90% at volume 40 of 62, bass boost off and all bass HU EQ settings on flat. now i know most of yall are like WTF!!, but my amps have held up completely fine and rarely ever get warm to the touch.

hell i did an 8hr drive straight bumping and my amp was barely warm.

 

[wrx_dad 10+ year member]

The deck has 4v pre-amp outputs. The bass boost was set to 75% and the subsonic filter was 75% of the total.

Bass boost is a nice option but its a big no, no when having it more then 6+ (half way). I am thinking that you could of fry'd the VCs not just because of the trunk open or playing long times (20 min?), but using that bass boost at that gain you were pushing them to far (the subs). either way CV should warranty them?