bonneville

iTrader: (1)

Hi, I just picked up these two Mmats 12" 600w rms subs. They came in a box, but I have no idea if it's a proper enclosure, or if the port is correct. I am looking for a really clean but powerful bass. No DB competitions, I just want to blow away the other guy at the lights. So, I guess it will need a good tune for driveability. Currently running these subs off 360 wrms, but they will get an upgrade soon to a 1000 watt amp. Any help is much appreciated.

bonneville

iTrader: (1)

Okay, I found some new information on these subs:
Ported box = 2.0 cu ft recommended. I have two, so do I double the cu. ft?
And the port = 20sq. inches by 15"L

Additionally, here is the subwoofer specs: http://www.mmatsproaudio.com/pdfs/subwooferspec.pdf

It is the procast 12"

bonneville

iTrader: (1)

Okay, the box I have is : 35 x 13 x 20 inches.

It seems like the enclosure is too big. Can it still be used? I could put some bracing inside to lower the cu. ft

MTT

iTrader: (17)

Try it the way it is and see how it sounds, then throw some wood in these to reduce the size and see if it improved.

bonneville

iTrader: (1)

Thanks MTT, good idea, I'll have to wait until tomorrow to try it out. It sounds pretty awful actually, not very musical, the port is unattached, so there is just a 4x4" hole in between the two subs. I'll either want to use this box and make some improvememnts, or I could just start over and make a whole new box.

bonneville

iTrader: (1)

I got a chance to play around with the box. I got the port put back together, the port measurements were: 4" x 7" x 9" A tuning calculator said the box should be tuned to around 37 hz. It sounds pretty damn good, for only 180 wrms each, I am impressed. It's enough to get the skull on my back sill bounce. I just can't wait to get 1000 watts flowing to these.

bonneville

iTrader: (1)

Would someone be so kind as to double check my work?
Here is what I have found so far:
Box dimensions: 35W x 20H x 13D
Subwoofers displacement: .30 sq. ft. total (2 subs)
Port: 7"H x 4"W x 9"L slide in 3/4 inch MDF rounded edges.
The port is located between the two subs
So, what should be the tuning frequency?

bonneville

iTrader: (1)

Any help for me here?

LOWTONEZ

iTrader: (3)

It is tuned to 39 hz. If that is the inside measurement of your port.

bonneville

iTrader: (1)

yup, its the inside measurements. thanks spinrs.