Amp gurus: am i missing something? or is it an internal problem?

[bbb543 10+ year member]

For background purposes, I have 1 12" Alpine Type R D4 bridged to 2ohm run by a Hifonics Brutus BXi 1606D.

Brutus:

http://www.onlinecarstereo.com/CarAudio/ProductDetail.aspx?Source=googlebase&ProductID=16368

Type R:

http://www.crutchfield.com/S-29QuQu9UpPN/App/Product/Item/Main.aspx?I=500SWR1242

Okay, so Im driving down the road this morning, and I start to notice the music is sounding like shit, assuming its just a poor burnt CD I didn't think anything of it. A few minutes later the sub cut off completely.

When I got home a few minutes ago, I checked all connections. Everything is good. Amp powers up fine, acts like nothing is wrong.

So, I got the ol' trusty meter out to check everything. Everything is fine from battery to amp, grounds good, fuses are good. The amp powers on, the dumb neons that I still haven't take out power on and everything is taking 11.7-12v (car off)

Now, I am no electrical engineer, nor am I an expert when it comes to the technical or internal aspect of electronics.

When I put the meter to the subwoofer input(s) on the amp it reads between - 0.4 and -0.6

Also the same when I put the meter to the terminal on the back of the enclosure. Any idea what the problem is/ is it fixable?

Let me know, I really don't want to go buy a new amp.

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[BASSMEKANIK 10+ year member]

are you running stock electrical ? second batt. ? how many amps is your alt. ?

 

[bbb543 10+ year member]

stock electrical, 4ga amp kit, 8ga from amp to sub, i believe it is a 120a alternator. single battery

 

[BASSMEKANIK 10+ year member]

might wanna check your battery, did you happen to have your headlights on this morning? might wanna check your sub wiring... unplug the amp from the sub and then check your load on your sub. pretty sure that amp wont like anything under 1 ohm...

 

[bbb543 10+ year member]

headlights were off and it happend while i was driving to class

 

[nismos14 5,000+ posts]

Did you check the coils on the sub??

 

[Trey803 5,000+ posts]

yea put a dmm on the coils.....sounds like a blown sub

 

[bbb543 10+ year member]

after disconnecting the sub from the amp with the car off the meter reads .9 or 1.0, with the car in accessory it still reads -.2, car on -.3

could it be something loose behind the HU perhaps?

 

[nismos14 5,000+ posts]

You're HU outputs could be fried, did you measure the voice coils of the sub?

What HU is it?

 

[bbb543 10+ year member]

how exactly do i measure the vc?

its a nearly new JVC KW avx 800 double din

^^feel like a n00b asking that, but oh well

 

[bbb543 10+ year member]

figured it out...nothin on the dmm..blown sub?

 

[nismos14 5,000+ posts]

Did you switch it to dc resistance first? and to 200? (typically 200 on the switch of the Dmm)

 

[its_bacon12 10+ year member]

disconnect the sub form the amp and then put the dmm on either lead. if you have the sub's voicecoils paralell, should read just under 2 ohms like 1.7 or 1.9 somewhere in between that..

if it read less, like.. .5 or something you have blown coils. the wire would be melted together giving it a lower dcr

edit: some dmm's have the option of measuring DCR and others have it as OHM

 

[bbb543 10+ year member]

yeah and i found a sub in my closet to test the amp with, it works fine

 

[nismos14 5,000+ posts]

Snarf that sucks you probably/possibly induced some clipping might wanna turn yoru gains down a lil.