can subs blow up?

[henrytad]

im currently running 2 12 inch rockford fosgate p2 subs in my vz powered by a 1800 watt boss audio amplifier. while i was listening the other day, the subs just stopped working. the amplifier and everything is still on but there is no sound coming through the subs. WHAT THE HELL?
what are the options on what has happened.

[Joe Bellissimo]

Boss Audio? You didn't buy it from Strathfield did you...?

It could be the amplifier. Or the amplifier could have clipped the subs to death and thus its the subs. There could be a loose wire. You need to use the process of elimination and test to find out what is it.

You could always pull a sub out and try to smell it to see if the coil is burnt but if your not sure what you are doing I wouldn't recommend touching it too much.

[henrytad]

haha yes i did get it from strathfield. ive got a spare p2 lying around in my garage, when i get home to night ill plug it in n see what happens. i just dont think its the subs cause i didnt hear the cones like break or that burnt smell come so its a bit of a tough one.
cheers ill comment back what happens

[Joe Bellissimo]

Sure mate.

[| evaN |]

if you've got a DMM, check the resistance of the subbies voice coils. zero resistance = blown sub

[acarmody]

Strathfield + Boss = FAIL. LOL, seriously, if the amp has a protect mode on it, it could have just done that. Also check the fuses on the amp. Everything else I would check has already bee said by others.

Strathfield aren't all bad. I got my first sub and mono amp from a Strathfield. A Pioneer TS-W307D2 and a Pioneer GM-6800M (I think thats right), and on a good special.

[henrytad]

hey again, i tried to connect my sub to my other boss audio amp thats powering all the front n rear speakers and the sub started kicking, so its the specific amp that was running the sub thats given up. im gonna give it back to strathfield n see if they can do something about it, the manager at the castle hill one is one of my mates so should be alright. as for the amps, im gonna get a dedicated rockford fosgate to run the sub, and a cadence to run my cadence speakers.
cheers

[acarmody]

Yeah good idead in replacing the Boss amp. Also last time I checked the Rockford amps were still a bit pricey, try having a look at the new Cadence range for a new mono amp. Quite cheap and apparently bloody good.

[BaggedVL]

if you've got a DMM, check the resistance of the subbies voice coils. zero resistance = blown sub

you mean infinity, not zero..

[dynoryder]

i would use hifonics amps

[StoneX]

you mean infinity, not zero..

It can be both... Open circuit or short circuit, it depends what happens to the coil when it burns.

[Joe Bellissimo]

Why don't we experiement on this? Who has some subs that they no longer want? I will happiliy run a couple thousand rms through them and upload it to youtube

[BaggedVL]

It can be both... Open circuit or short circuit, it depends what happens to the coil when it burns.

very little chance of a subwoofer, ever, under any circumstances failing as a short circuit.

thats a whole lot of turns in a coil to short out into a single blob

[StoneX]

I see them nearly every day with resistances of 0.1ohm (short circuit) for a 4 ohm subwoofer with a burnt coil.

[BaggedVL]

I see them nearly every day with resistances of 0.1ohm (short circuit) for a 4 ohm subwoofer with a burnt coil.

I doubt that.

you can make whatever claims you want though

[StoneX]

Keep doubting, but that's a burnt 4 ohm coil measuring pretty much short circuit. Far from open circuit.

[r_i_d_a_h]

haha owned....

[BaggedVL]

Keep doubting, but that's a burnt 4 ohm coil measuring pretty much short circuit. Far from open circuit.

thats no where near a short circuit, 0.1 ohms is a short circuit, hell, 0.7 ohms and chances are the amplifier would still run it!

like I said:

"very little chance of a subwoofer, ever, under any circumstances failing as a short circuit."

a few shorted turns isn't a short circuit.

[StoneX]

That one was 0.1 ohm, before taking the cone and voice coil out of the basket, due to the burnt coil touching the metal in the VC gap. So a speaker with a burnt coil will show up as a short in some circumstances.

[0081]

Why don't we experiement on this? Who has some subs that they no longer want? I will happiliy run a couple thousand rms through them and upload it to youtube

What state are you in i have a sub that i might not need as it has a crack in it from the dum ass tyre shop down the road lets just call them j******sons

[Tasmaniak]

thats no where near a short circuit, 0.1 ohms is a short circuit, hell, 0.7 ohms and chances are the amplifier would still run it!

like I said:

"very little chance of a subwoofer, ever, under any circumstances failing as a short circuit."

a few shorted turns isn't a short circuit.

I have a Clarion pxw1252 sitting here with a welded voice coil.... I can lean against the coil and it ain't gonna move. coil resistance reads .3 ohms. now how much of that is also resistance from my DMM leads?

Stone, is that one of the new Champion series?

[StoneX]

Nah, it was just a TS-W307D4.

[edit]
Which do say "Champion series" on the cone.

[Tasmaniak]

underpowered? I sent one to you guys recently (ok about 3 months ago) because the customer insisted that the sub was at fault and he demanded that you guys replace it under warranty. What else could I do but sigh and just send it off? I got the answer I was expecting. Overdriven. Not covered by warranty.

[StoneX]

Yeah, I don't get how people think the sub can be at fault for burning. If it just stops working, then I understand they want it checked but when the cone won't move and it stinks like smoke, I just don't understand

[Joe Bellissimo]

I wonder if it would be possible to install a fuse into subwoofers that would cut out once the subwoofer was receiving frequencies and current that would exceed its mechanical limits...