Recommendations on dual 12", vertically stacked DIY sub?

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Kooshball

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Joined 2012
#1
I am looking to redo and update my music / HT setup and in addition to building new main and cent speakers I am looking to build a standalone sub. I currently have a pair of Polk rt2000p towers, each with dual 8" powered subs for my bass. These sound good but I know I can do better.

I plan to build new towers without any powered subs and will then need (or can even now enjoy) a separate sub. Due to floor space issues I would like to maximize the sound with a minimal footprint so I figured a dual driver (12") setup with a vertical configuration would accomplish this well.

Any suggestions?

Thx
 
#2
Not a dual 12, but here is a triple 10 I did with the NHT 11-083 12 ohm subs. The subs are NLA, but were blown out by Jack Hidley when NHT reorganized. A lot of DIY'ers stocked up, so they show up on the sale forums frequently. I will never need another sub. The sealed design works great for music, and the displacement makes HT amazing.

Introducing Towering Subferno
 
#6
Kooshball said:
Now that is what I am talking about! Maybe overkill but certainly worth a look, how tall did it end up being?

Any good alternatives to that driver?
Click to expand...

It is 42" tall. That particular sub is a 12 ohm driver, so 3 in parallel yields a 4 ohm load to the amp. I am not aware of any others, except some of the earlier JL Audio W6 line that had dual 6 ohm configuration. But there are some 8 ohm 12's that would fit your dual sub idea. You might consider an end table or coffee table design for WAF.
 
#8
Coffee table that stirs your coffee

I built a 12" tall X 16" wide X 36" long (inside dimensions) coffee table with 2 sealed chambers in it.
I used 2-12" floor firing subs, each had 2 ft.^3 of volume behind them.
They were Pyle woofers that are NLA (they said "Pyle Drivers" on the cone 😛), but I choose them for the specs, a very low Q (0.29 IIRC) and mainly a claimed 97 dB SPL 1W/1M, an Opamp labs SM-100 (100 Wrms) powered it quite well.
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It was made from 3/4" MDF with 1/4" Luan glued onto the outside, corners mitered,stained, polyurethaned and polished to furniture (WAF) standards.
It sounds great, but I wouldn't recommend it for apartment dwellers.
I had it in a house trailer and you could hear it thumping for 3 or 400 yards.
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Part of the WAF was it had to be kitten proof, as they would squeeze under the thing (it had a 2" clearance above the carpet) and claw the speakers.
After replacing both speakers a pair of 3/4" thick, 15" Iso-baric rings with 1/4" hole chicken wire cured that.
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I think the floor firing designs have a certain desirable character that possibly has to do with the speakers firing right into carpeting.

Dave
 
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