EDGE

Would 1/2" Birch suffice for two 10's in a ported enclosure. Trying to keep the weight down a bit from 3/4 MDF

theraymondguy

Motor force is a concern, are we talking 150W subs or 1500W?

EDGE

Twin 150 fosgates with a single channel mono amp

theraymondguy

Typical loading, side by each I believe you’d be alright, some bracing between the woofers and in the corners off the box would help to stiffen things up. Having a doubled front plate (married with glue) would be of benefit as well.

Ensure your front and back plate extend over the remaining pieces so that they’re better supported. Remember that the glue is doing all the holding once it’s cured, don’t be shy.

Or be lazy and just put in a baffle board lol.😝

EDGE

Lol. I thought about the baffle board but my subs aren't infinite baffle.

theraymondguy

Just as all camshafts are turbo camshafts, all subs are infinite baffle.

EDGE

I know anyone will work but are they not generally subs with a higher Qt number?

theraymondguy

absolutely yes. Sadly modern subs seem to have abandoned Qt in an effort to operate in the smallest enclosure possible. Alpine JL, Kicker, Rockford, Hertz et all.

You might be better served looking at older subs if IB interests you.

Im currently running Alpine SWS10s, Qt = 0.68. Ideally your looking for 0.70 or higher, however isobaric operation will “stiffen” any subwoofer.

EDGE

My Rockford's are 4.9. For a ported enclosure I need 1 cuft per driver. I have two. I have a sealed 3/4 MDF box in there now but it's very heavy and I'm not really liking the sound. Always preferred a ported enclosure over sealed. This is why the IB interested me. The weight reduction.
​​

theraymondguy

Wish me luck Edge,

With port and woofer displacement accounted for,
0.85 cu ft 1/2” birch with 3/4” front plate for isobaric clamshell mount. The thinking is that I can get decent cuts off of the bench saw, tight gaps and small dimensions (24x11x9x7) will allow the box to be strong enough. One 3” brace front to back boxes in the woofer and a slim brace along the angled section for a little more surface area (instructions are in the faq, about 70 posts deep).

33 Lbs assembled with 2 10” woofers. The box without the top is 10 Lbs.

91formula_WS6_5

Any pics of the finished product?

EDGE

Well Sir, you were 100 percent bang on. My "not IB" speakers are now on an open back baffle board and it pounds more than it ever did in the box. A lot more. Crushingly more actually.