burnt voice-coil

Unicode2021 · May 2005

what could be the cause of the burnt voice coil in the SCV momo's? any detailed explination will help to prevent another sub

swerve · May 2005

before you put the other one in the box
put some ice packs on the terminals man. that prevents it from getting burnt by making it more susceptable to heat.

^^^j/k

maybe enclosure size???

Unicode2021 · May 2005

who makes a good box for the momo's? and what is a good size?

swerve · May 2005

i don't know seriously man. wait for other people's opinions...

-adam

neomagus00 · May 2005

a good size for a 12" momo is .88 ft^3, sealed, as per the manufacturer's recs. a good boxbuilder is you, if you're patient and decently skilful. other than that, someone can provide you with the names of good builders.

a burnt vc can be from too much power, too much clipping, too big a box, bad wiring, bad breakin, etc. etc....

swerve · May 2005

Originally posted by neomagus00
a good size for a 12" momo is .88 ft^3, sealed, as per the manufacturer's recs. a good boxbuilder is you, if you're patient and decently skilful. other than that, someone can provide you with the names of good builders.

a burnt vc can be from too much power, too much clipping, too big a box, bad wiring, bad breakin, etc. etc....

phil at woodlawn cabinetry...

AustinKP · May 2005

VC's get burnt when they receive more heat than they can dissipate. This is usually due to clipping, or pushing the sub past the excursion limits. In both cases, the VC is receiving additional power, but isn't moving more, thus no way to shed the excess heat.

exalted512 · May 2005

pushing the sub past its excursion limits will not cause a VC to burn up...but usually, if youre pushing your sub past its excursion limits youre doing something wrong like too much power which could cause it to burn up
-Cody

MacLeod · May 2005

Cody is right.

There are 4 things that kill a speaker.

1- You stick a screwdriver thru the cone
2- You use too much power and build up more heat in the VC than it can safely dissipate.
3- You use too much power and cause the speaker to move further than its suspension will allow.
4- You let Cody use it for a few weeks.

VR3 · May 2005

Not enough power + distortion = boom

To much power + over-driven = boom

exalted512 · May 2005

Originally posted by Vr3MxStyler2k3
Not enough power + distortion = boom

if its below the speakers limits, you can play it distorted all day....
-Cody

audiobliss · May 2005

Originally posted by MacLeod
4- You let Cody use it for a few weeks.

ROFL

VR3 · May 2005

Originally posted by exalted512
if its below the speakers limits, you can play it distorted all day....
-Cody

But why would u want to?

neomagus00 · May 2005

you wouldn't, but it happens a lot

exalted512 · May 2005

Originally posted by Vr3MxStyler2k3
But why would u want to?

not saying youd want to, just saying it wouldnt kill it

and F all the Cody haters around here:mad:
y'all are just jealous

-Cody

MacLeod · May 2005

Distortion doesnt hurt speakers as long as its below their limits. A speaker doensnt know the difference between a distorted or clean signal. It just plays what the amp tells it to. You can crank a 10 watt head unit into maximum distorted cliiping all day long to a set of 150 watt speakers and theyll never so much as whimper.

Hell I do it 10-12 hours a day. My work truck has a stock Panasonic POS AM/FM radio but since the stock speakers were dead it has some cheap aftermarket Pioneer (I think) coaxials in there. I drive around all day with the radio literally turned all the way up to max, where the volume knob stops. Its sounds like **** but I can hear it over the noisy **** diesel. The speakers can handle at least 50 watts and my crappy radio will never make more than 10-20 so the speakers are never bothered, just my ears!

The reason people associate distortion with speaker death is reason #3. When you deliver too much power to the speaker and it is pushed beyond the limits of its suspension, it distorts signalling its eventual demise. But when sending a distorted signal from a puny head unit to a tough speaker youll never hurt it.

And Cody, why should I be jealous? Ive got a bigger post count!!

audiobliss · May 2005

Originally posted by MacLeod
And Cody, why should I be jealous? Ive got a bigger post count!!

:eek: :eek: :eek: :eek:
It finally happened!! :eek:
Where have you been doing all that posting???

MacLeod · May 2005

90% have been here.

Ill post in the Clubhouse a few times and maybe in the movies section but most of my time is spent on this side.

Plus I have no life and Cody does.

audiobliss · May 2005

LOL

Nah; you've got no life AND a great car audio system!

:eek: please don't hurt me......

MacLeod · May 2005

Not great yet. Still need a sub, and my imaging sucks cause my doors are 15 feet apart! :mad:

AustinKP · May 2005

If you're pushing a speaker past its excursion limits, the cone is stopping while it's still receiving power from the amp. That is, in effect, clipping, which will overheat and burn a VC. That was my point.

Like Mac said, distortion is completely harmless (except to your ears). It's a common myth that distortion will damage speakers. That is completely false. Heck, any electric guitar gets its sound from distortion. Any sound that isn't a pure sine wave could be considered distortion. Speakers are MADE to play distortion. That's about all they do.

Clipping and overpowering kill speakers. That's it. Well, that and a screwdriver through the cone

-Austin

MacLeod · May 2005

Originally posted by AustinKP
If you're pushing a speaker past its excursion limits, the cone is stopping while it's still receiving power from the amp. That is, in effect, clipping, which will overheat and burn a VC. That was my point.

Like Mac said, distortion is completely harmless (except to your ears). It's a common myth that distortion will damage speakers. That is completely false. Heck, any electric guitar gets its sound from distortion. Any sound that isn't a pure sine wave could be considered distortion. Speakers are MADE to play distortion. That's about all they do.

Clipping and overpowering kill speakers. That's it. Well, that and a screwdriver through the cone

-Austin

....and Cody!

exalted512 · May 2005

youre jealous because my truck sounds better than yours...AND its a GM:p
and you still have to get another 1800 posts before you pass me up buddy!
-Cody

MacLeod · May 2005

I dunno what youre talking about. Ive no proof you had this other SN.

I dont know about sounding better either. Yours is much louder and youve got a lot higher end equipment in there but Id give you a run on straight SQ.

Systems · May 2005

The problem with the momo line is in the spider wire itself. this sub is made china with the cheapest parts available. I have went through 16 mm12 in my demo vehicle. I hate to say it but the momo line does not even belong in the competition word. Dont get me wrong they are some the best sounding subs I have ever used. I have used over 6 different brands over the past years. The weakest link in the momo line is its spider wire. If polk would beef up its product it would be able to hang in the spl world. I have seen some of the spl subs and amps polk is prototiping and maybe the will be stronger.

MacLeod · May 2005

Yup, the MM12 is pretty puny. However the new Momo line has had none of those problems.

Apparantly there was just a problem with the MM12 cause in the 2 years the MM2's have been out Ive not seen any complaints on this board and know of none personally.

exalted512 · May 2005

umm, i dont really think you know what youre talking about to tell you the truth. the mm12, even if made beefier, would never last in the spl world. their sound quality is average. and you cant spell prototype.
that is all
-Cody

neomagus00 · May 2005

mac, what is this mm2 you speak of?

and dude - wouldn't you figure out that you were going with the wrong sub after you blew FIFTEEN subs? did it really take that sixteenth to drive the point home? and momos are not SPL... duh...

Unicode2021 · May 2005

OK, well heres the deal with the MM12, my setup is the momo C500.1 and a single MM12 (SVC) wired for 4ohm I have the gain down realy low on the amp and im using the remote gain @ that, so my understanding is that once the remote gain control is pluged in, then the master gain is disabled (Please correct me if im wrong) now...i am running a cheep pioneer head unit (35w X 4) i run the volume in the headunit @ about volume #25 and which is about half volume but if i take it any higher than the like #35 "BOOM" my **** blows but #25 just dont hit enough and #30 sounds good but im pushing my luck there, But!...i have just orderd 2 MM12(DVC) and i am going to wire them in a 2ohm setup, the next question is would it be advised to wire the sub's on there own channel or to wire them on just the #1sub terminal? and given the senerio can any one narrow down the reason for a burned VC

and what are the advantages of the MM12(DVC) over the MM12(SVC) and why are they the same price?

neomagus00 · May 2005

the DVC simply allows for different wiring options. and it's easier to wire one sub into each output of the 500.1, those outputs are internally paralleled.

unfortunately, you've ordered a combination that will allow only a 1 ohm or a 4 ohm, and the net result is that you will achieve no additional performance - you'll have the same power as you do now, divided into 2 subs.

a better choice is to keep your SVC, and order another one. you can then wire each to its own terminal and get 250 watts apiece instead of 175. (that's rated power, add about 50 watts for real-world power).

and to set your gains properly, go here

Unicode2021 · May 2005

That doesnt make to much since, im looking @ a wiring diagram from the momo MM12DVC users guid and is shows serveral types of load wireing 1ohm, 2ohm, 4ohm, and a 8ohm setup and all from a 4ohm speaker and the setup i've selected is a 2ohm load that way i can get 500w per speaker, the amp i have is capable of a 2ohm or a 4ohm load, 4ohm=350x1 and 2ohm=500x1.

burnt voice-coil

Comments