sub blowing my 4000 watt amp with two 40 amp fuses.

[tweak_09 0]

id like to know why my 4000 watt amp wont push 1 15 Bl fully loaded without blowing both my 40 amp fuses in it.

[Yang 2]

you gotta tell us what kind of amp is it...

how's ur electrical under the hood?

Without more details it will be hard to give you any advice

[Lord Baccus 1]

what ohm load are you imposing on the amp ?

is it a mono block ?

2ch ?

4 ch?

is the amp properly grounded ?

do you have enough voltage ?

are the speaker wires touching ?

[hayes55987 0]

hmm...i dont know if everything adds up

a 4000 watt amp on a BL? and only 80 amp fuses on the amp?

what are some more specifics?

[rastaman 0]

14.4v x 80a = 1152 at 100% efficiency, assuming its a class d at 80%, that amp could only push 920 watts before blowing fuses. Even still, your system probably doesn't even do 14.4 constantly, most likely 13.8. 4K is far off.

Don't look at peak ratings!

[tweak_09 0]

i have a 4000 watt 2 channell lanzar amp...not the best brand. But my friend has the same amp and he is running 2 Diamond audio D9's off of it and they do just fine...Then when i tried plugging my Bl into His amp i blew his fuses too...my ground is fine.

[tweak_09 0]

i havent put the sub in a box yet...i was free airing it, but still, i shouldnt be blowing 40 amp fuses one after another.

[BKOLFO4 29]

What impedance are the Diamond subs, and how are the wired to the amp???? What impedance are the BL coils and how are they wired to the amp????

Sorry, but it is obvious from your posts so far that you better get help before you continue. You are going to blow the amp, sub, or both. . . .

4000 watts to a sub freeair that is rated way under that. . .

4000 watts from an amp with 80 amps of fuse. . .

Provide a specific model number of the amp, the voice coil impedance of the BL you have, and how you have it wired. Sounds like you may have the amp running below the rated minimum load. . .If you have the coils in parallel and the amp running bridged, there may be a problem.

Edited December 1, 2007 by BKOLFO4

[tweak_09 0]

MXA282-4000 Watt 2 Channel High Power MOSFET Amplifier

SPECS

2 x 1000 Watts RMS at 4 Ohms

2 x 2000 Watts Max at 4 Ohms

1 x 4000 Watts Max at 4 Ohms Bridged

2 x 1650 Watts at 2 Ohms RMS

Electronic Crossover Network

Bass Boost Circuit

Variable Phase Shift Control

2 Ohms Stereo Stable

Anti-Thump Turn-On

Soft Turn On/Off

High & Low Level Inputs

Blue Light Illuminated Crossover Control

Power & Protection LED Indicators

Advanced Protection Circuitry

Bass Boost Remote Control

T.H.D: 0.04%

S/N Ratio: 90dB

Channel Separation: 65dB

Frequency Response: 15Hz- 35kHz

Dimensions: 10.47''W x 2.46''H x 21''L

I have the sub wired like this....i have a negative to negative on the sub, then positive to positive, then a negative and a postive to the amp at 4 OHMs

[tweak_09 0]

oh and each diamond is dual 2 ohm

i have the Bl fully loaded dual 2 ohm with spl.

[rastaman 0]

oh and each diamond is dual 2 ohm

i have the Bl fully loaded dual 2 ohm with spl.

I bet you have it wired to 1 ohm. Wire it to 4 ohms and run it bridged.

[BKOLFO4 29]

You have a dual two ohm sub wired in parallel. That is 1 ohm.

If you are running the amp bridged, it is seeing 0.5 per channel!!

You need to wire the sub coils in series. Positive from the amp to positive on coil one of the sub. negative on coil one of the sub to positive of coil two on the sub. negative on coil two of the sub back to the negative on the amp.

Edited December 1, 2007 by BKOLFO4

[tweak_09 0]

alright...iill try it out. thanks alot.

[tweak_09 0]

damn...thanks man. i was worried i was completly fudgeed and had to buy a whole new amp and chit. but it works, thanks.

[jonbearsmt 919]

get a better amp, if you underpower that sub you will blow it.. just as easy to blow a sub underpoweing as over powering

[todd.brust 29]

well not technically underpowering it, maybe clip it to death by trying to get more out than it is capable

[AlpineAndy 3]

Yea underpowering a sub wont hurt it, technically you underpower a sub when you don't have the volume on the deck up very high, it is just way easier to over gain your amp when underpowering it.

[JimJ 11]

it is just way easier to over gain your amp when underpowering it.

In that case, if the amp goes into clipping, it's no longer "underpowering" anything and the sub still dies from thermal failure

Sending a driver power that's below its thermal rating will never hurt it...unless the manufacturer lied, made a defective product, or you installed the sub in a situation like IB where you run into mechanical limits first. I ran 8 watts with lots of 2nd-order distortion to a pair of 100W-rated Klipsch towers for a year, and guess what? They didn't die

[todd.brust 29]

LAIR! lol only joking...but i am curiou to ask...what is second order distortion? or even first order? was it maybe some kind of distortion like humming from a tube amp? just wondering, especially with 8 watts i figured maybe tubes

[tweak_09 0]

that amp hooked up to just one bl should be fine...power wasnt a problem it was my dumb ass that wired the sub to a 1 ohm impedence, and didnt realize it.

im plannin on selling this bl and buying a 15 btl hooked up to a US amps xt4000d, sound good?

[BKOLFO4 29]

With that amp, just keep the BL!!!!

[tweak_09 0]

alright lol...sounds good.

[tweak_09 0]

i also had one more question....do you think if i made a box that is ryhno lined for my bl and put it inthe bed of my avalanche, would it still sound somewhat good???

[Lord Baccus 1]

Yes !

i have done this on many boxxs...

box gos from 3/4" to 1" with BL sprayed...

[url="http://s145.photobucket.com/albums/r228/lordbaccus/?action=view

Edited December 3, 2007 by Lord Baccus