[dan711]

Just completed my first build. I attempted to load pictures but the first time they were enormus and then the second time you can barely see them so I give up with that.

I have a birch wood box externally meauring 18 x 20 x 52 with a slot port tuned to about 18hz. I have installed the Tempest-X2 15" powered by a PE 500w plate amp with about 20% poly-fill. I am getting a tremendous amount of low-end rumble but it tends to taper off quickly once it goes up past 30hz or so (kinda of guessing here). I have the amp configured as followed:

• LFE direct input
• low pass gain-approx 1/3
• low pass freq-200hz
• phase-0
• eq freq-18hz
• eq bandwidth-.5
• eq level- -5 db

I ran Audyssey ( multeq-xt )from my Denon 4310 and set the crossover at 80hz and speakers set to small. Audyssey set the sub at +3db and then I bumped it up to +7 db.

So far this sub has more output down low than the MFW-15 it's replacing but doesn't come close after that. Any pointers in the right direction would be appreciated.

Dan

 

[dan711]

Did some more tweaking. I re-ran Audyssey. Raised the low-pass filter from 80hz to 120hz. Changed from L/R inputs to the LFE (mono) input on the sub amp. Speakers remain set to small with 80hz crossover for the front 3 & 100hz for the rear. Overall it sounds much better than before. The bottom end tightened up and I'm definately getting more mid-bass now. I will continue testing and possibly tweaking over the next couple of days to get the sub more dialed in.

link to some pics: keep in mind this is my first build and I don't own any fancy tools like routers, table saws, orbital sanders, etc. All the work was done with a circular saw, miter saw, jig saw and hand sanding.

http://gallery.avsforum.com/showgallery.php/cat/500/ppuser/7424317