cancelation

[Trevor Eaton 0]

okay ive got a mag 15 in a 2.2 cuft box sealed. id prefer bigger but its what i already had. the box is almost square but the front and back are definetly parallel. now ive got a JL 1000/1 on it... and its not very loud. i dont blame it at all on the sub. i know its capable of pain.... but i dont see how it could be the amplifiers fault. i tuned it to 64V with a true rms dmm. at 4 ohms thats appx 1030w rms or something. plenty of power for a mag to scream. when i get my ported box built and if i still think its not loud enough im going to try to hook up my friends eDnine.1 to it and see if thats a problem. but for ported boxes parallel baffle and back is perfectly fine right? i plan to have the subs mounted facing the roof... ports too... but have any of you experience cancelation with a mag or any driver? how big of a cut in SPL was it? cancelation is the only thing i can think of.... i know these subs wouldnt dissapoint me... i know a square box can cuase cancelation but i dont really know if it is for sure... help me out if ya can guys. any input is appreciated. thanks!

[Tirefryr 1,742]

The enclosure shape is going to have little to no effect on the driver as far as a sealed enclosure is concerned. You'll hear many debates about standing waves, but they are not going to be present in subbass enclosures.

What is the vehicle? Have you double checked you wiring? It sounds to me as if you have the coils wired together, yet out of phase essentially causing a short.

Double check everything and make sure it's all correct.

[krazie 0]

The enclosure shape is going to have little to no effect on the driver as far as a sealed enclosure is concerned.  You'll hear many debates about standing waves, but they are not going to be present in subbass enclosures. 

What is the vehicle?  Have you double checked you wiring?  It sounds to me as if you have the coils wired together, yet out of phase essentially causing a short. 

Double check everything and make sure it's all correct.

<{POST_SNAPBACK}>

my 12" sealed in 1.6 cu screams with a mere 1200w from my nine.1 @ 1ohms in reality its probably like 1000w BTW

It makes my ears tingle....

Wiring problem??

[Trevor Eaton 0]

no, i have the positive from the amp going to the positive terminal of VC1, then the neg of VC1 to positive VC2 and neg of VC2 to negative of amp. i hooked it up to my dmm and it read 4 ohms. its a 2002 cadillac escalade. any1 have any ideas on how it could be the amp? i just dont think its possible to be at the amps fault.... idk... but i better be able to figure it out.... thanks guys... inputs still welcome

[Tirefryr 1,742]

You have it wired correctly. The problem lies somewhere else.

If it is a cancellation issue, try moving the enclosure around and seeing if that helps. Also try different firing arrangements. If nothing helps, then the problem lies within the equipment somewhere.

[Eldorado 0]

Well i know there isnt anyway you'll get cancellation in a huge cabin like that.

Give it more gain and see what happens.

it could be the amplifier

[Trevor Eaton 0]

well im using a dmm to tune the amp, i cant just keep giving it more and more gain. the dmm tells me its putting out 1000w rms. i havent used the clamp meter yet to use AxV=W yet. i'll do that tomorrow, too. but today, im too busy. also i am hooking up an eDnine.1 to it tomrrow. i'll see if its the amp. i'll let ya guys know how it goes tomorrow. thanks!

[Tirefryr 1,742]

It may very well be putting out the correct voltage, but that doesn;t mean you don't have a malfunction in the crossover? Get my drift?

RECHECK EVERYTHING!

[///M5 2,833]

As well as I have seen a mismarked vc before as well which could cause your problem if it is only one, if you apply a DC voltage to each coil independently do they both move the cone the same way?

[Electrodynamic 2]

My two 12's are in a rectangular box where the walls are parallel and I have no cancellation issues. I spent about 30 minutes building it too, so it's a leaky little sucker.

I'm wity Tirefryr though, it's got to be something else. Phase, crossover settings, something! :ph34r:

[///M5 2,833]

Easy to check crossover, play back a 60Hz tone to set your gains with. Then play a 500Hz or 1k and see what it outputs.