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Old 13th December 2006, 10:22 PM   #1
Ray Bao is offline Ray Bao  United States
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Default anybody got an enclosure?

I'm going to buy a pair of Fostex FE207E (maybe 206E if i can do w/o the shielding) and was looking for a design that fits these needs:

a. vented BR or vented DBR...
b. floorstanding...if possible
c. simple easy to build
d. no crossover

Any ideas?
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Old 14th December 2006, 12:48 AM   #2
holdent is offline holdent  Canada
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Martin King's ML TL for the FE207/206 (Project 5) is reportedly excellent. See his write up at http://www.quarter-wave.com/Project05/Project05.html Though not a BR (or DBR) in principle, its built the same way as a BR.
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Old 14th December 2006, 02:12 AM   #3
Ray Bao is offline Ray Bao  United States
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I'm trying to squeeze the most bass possible out've a pair of fullrange 8"s -- hence why I was led to believe a vented floorstanding BR/DBR design is the way to go.

And for simplicity's sake, I'm trying to avoid a crossover (at least for now) but still manage to have these things drop jaws.

I did a search and read that 75-liters was a good size? Somebody correct me if I'm wrong (that seems awfully large...)
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Old 14th December 2006, 02:27 AM   #4
holdent is offline holdent  Canada
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An ML TL is a vented enclosure and will give a response down to the 30s -- it looks like a tall BR but acoustically works differently (better).

Note that unless you build a horn you'll need at least a BSC (baffle step correction circuit) whether it is a BR, DBR, or ML TL. The BSC for Martin's Project 5 is provided. Martin King is very highly regarded and this site provides the theory behind his designs as well.
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Old 14th December 2006, 07:22 AM   #5
jsb is offline jsb  France
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Well I'm using the FE207E standard DBR enclosure (I've posted the pic in the gallery) and there is no particular need of a BSC to my taste (but the simple BR just could'nt work without one). I'm using tube and hybrid tube/mosfets amps, so that might explain.
This is already excellent.
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Old 14th December 2006, 07:42 AM   #6
klykx is offline klykx  France
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I'm using the FE207e in MJKs MLTL project 5 and using EQ instead of a passive circuit. With my system, the result is really pretty impressive as far as my failing ears can tell.

I thoroughly endorse the MLTLs as the bad carpenters first go at DIY

cheers
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Old 14th December 2006, 01:57 PM   #7
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Martin's MLTLs are as good as it gets for an 8in driver in terms of extension, in a (relatively) compact enclosure. Ed's folded TQWT is good too in terms of weight (better if anything) but doesn't go quite as low. Remember, the BSC circuit is not a crossover -it just attenuates the HF to compensate for baffle-step loss.
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Old 14th December 2006, 02:36 PM   #8
Dumbass is offline Dumbass  British Antarctic Territory
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Quote:
Originally posted by Ray Bao
I'm trying to squeeze the most bass possible out've a pair of fullrange 8"s -- hence why I was led to believe a vented floorstanding BR/DBR design is the way to go.
IIRC double bass reflex actually doesn't add low freq extension. The alleged advantages of DBR are controlling impedance and excursion peaks.

I vote for Martin's project 5. But if you can spare the space and lumber, also consider the Bigger-is-Better design:
http://www.zillaspeak.com/bib-fostex.asp
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Old 15th December 2006, 08:31 AM   #9
phresh is offline phresh  United Kingdom
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I'd recommend Bob Brines version of Martin King's Project 5, if only because you can buy the plans off of him making the planning a lot easier.

They are big speakers still, compared to retail floorstanders at least, but you will get decent bass out of them. For comparison they made my Mission M74i's (which reviewers praised for it's bass output) sound very weak.
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Old 15th December 2006, 07:25 PM   #10
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Hi Ray

I know I shouldn't be promoting my own babies but everyday brings a bigger smile to my face with these. They address b,c and d on your list...and I believe any more bass out of these would be in the realms of fiction.......

www.vitalstates.co.uk

follow the vofo link

Regards

Ed
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