[ghause]

I've shifted alegiance to the bears to get a deal on two 15" PRs and a Shiva-x.

I'll be doing a 3 cubic foot passive box. Does anyone know the volume of the PR-15?

Since I believe this arrangement will need a subsonic filter, I was thinking of an Elemental Designs eQ.2 (Reckhorn B1? - Behringer xxx?) . Does this seem wise?

 

[ghause]

I'm going to make this 17w x 26h x 18d. Drivers will be arranged toward the bottom on the same horizontal plane. Bracing will be added as to not have to deal with working around drivers to knock the volume down to 3ft^3 per this box's recommended volume.

My ultimate goal is killer bass and a nice looking center channel stand in one shiny black package (maybe rosewood if I can convince myself that veneering is worth the effort).

 

[Mike P.]

Sounds good. What will you be powering the sub with?

 

[ghause]

I'd talked myself into a BFD and EP2500, but I don't know if the BFD will jive with my pre's Audyssey calibration.

 

[ghause]

Volume Issue

My cabinet is nearly ready to be glued up, I have a minor issue that may be a problem

Assuming that the PR-15 is the same volume as the Shiva-x, .15 ft^3 my volume is a tad high, 3.155 ft^3.

Is this a potential problem? Especially since I picked up a PE 500w bash amp, whose cutout will add on some volume tooo.

 

[Mike P.]

The extra .155 ft^3 won't be noticeable. You're going with the Bash 500 instead of the EP2500? Got any build pics you can post?

 

[ghause]

Pics coming soon.

I have lost patience with black lacquer (two coats of sanding sealer and four coats of lacquer later) and I think I will be completing assembly tomorrow. There is no shame in a flat finish.

Any idea how much weight I should put on the PRs?

 

[ghause]

 

[ghause]

 

[ghause]

Fast forward a week of poorly spraying shellac...

 

[ghause]

And her it is done...

I didn't countersink the drivers because the edges are not square so I would have had to deal with a funky seam. I also couldn't find my speaker gasket tape so these are just screwed flush. I took off the PRs to mess with the polyfil and they sounded pretty well stuck to the shellac.

:yay2:

 

[fackamato]

What's the tuning frequency?

 

[ghause]

What's the tuning frequency?

Yeah, um, no clue.

 

[fackamato]

Yeah, um, no clue.

Err, so you just put some weight on the PRs, chose a box size for no reason and put it all together?!?! I hope that the PRs have the same mass!!!

 

[ghause]

The dimensions are based on the info sheet from DiyCable. It is the 3 cubic foot / dual pr box spec'ed there.

 

[fackamato]

The dimensions are based on the info sheet from DiyCable. It is the 3 cubic foot / dual pr box spec'ed there.

Oh I see! Directly from Kevin Himself

How does it sound then?

 

[ghause]

I have not really put it through its paces yet, but the beginning of 'Bolt' was pretty impressive.

Audyssey bumped it up 12 db with the vol of PE's 500w bash at about 2:00.

I'd like to do some real measurements, but I don't have a decent mic.

 

[dgilme]

I have not really put it through its paces yet, but the beginning of 'Bolt' was pretty impressive.

Audyssey bumped it up 12 db with the vol of PE's 500w bash at about 2:00.

I'd like to do some real measurements, but I don't have a decent mic.

Careful that much boost may lead to serious amp clipping.

 

[ghause]

Careful that much boost may lead to serious amp clipping.

Boost out of the pre? Stinking Audyssey. It thought my old sub was 10m away.