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New to full Range- Questions about Fostex
New to full Range- Questions about Fostex
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Old 7th October 2013, 06:08 PM   #1
crcook is offline crcook  United States
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Default New to full Range- Questions about Fostex

I was at Burning Amp show for a while yesterday. Could not stay as long as I wanted to, but did see and hear some great stuff. I noticed several home brew Fostex based speakers set up. They were in bass reflex (?) type boxes, vent in the front. Although the listening environment was not the best, they sounded good to my ears. Doing some research, there seems to be a lot of stuff about FR speakers. Madisound has enclosure kits for folded type enclosures and plans for those and the br boxes I heard.

I am interested in a replacement for my ancient home brew Ariels and something to compare to my JBL 4406s. Small room which limits my choices. Also have spousal approval issues, so some of the weird and wonderful open baffle stuff I saw at BA show won't fly. I will be driving whatever I end up building with a 30wpc digital amp, an ST35 tube clone amp, and my recently build Pass F5.

Any good starting links for Fostex threads? Prefer more recent reviews, builds, or listening tests.

Thank you in advance.
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Old 7th October 2013, 06:44 PM   #2
chrisb is online now chrisb
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a better place to start might be to ask if you have any idea which particular Fostex driver and type of enclosure you enjoyed

e.g. not all boxes with ports are "simple" BRs


Fostex makes a wide range of drivers for the DIY hobbyist field, and they are certainly a favorite of many, but I daresay most any of them would be considered to have more "personality" than something like a system engineered as a "Studio Monitor", which usually implies wider bandwidth, more neutrality and greater power handling capability than a lot of music loving hobbyists can be satisfied with.

But then all generalizations are inherently risky.
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Old 8th October 2013, 09:17 PM   #3
Inductor is online now Inductor  Portugal
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Are you more interested in a 4" to 8" driver... or some volume/size of enclosure to give an idea of your future project...
Fostex FE166En 6.5" full range, it works in a 10L BR. Good driver for horn enclosure too.
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Old 8th October 2013, 09:19 PM   #4
planet10 is offline planet10  Canada
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New to full Range- Questions about Fostex
Quote:
Originally Posted by Inductor View Post
Fostex FE166En 6.5" full range, it works in a 10L BR
Not very well in a BR, it want sto be in a horn. If you want a BR FF165wk is more appropriate.

dave
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Old 9th October 2013, 06:18 PM   #5
Jim Shearer is offline Jim Shearer  United States
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crcook,

There are lots of designs here for Fostex drivers.

But first: we need a clue as to what you are after. what music? what SPL? room size/shape?

Skipping the OBs, you might look at:
Metronomes: The Metronome

BIBs: http://www.diyaudio.com/forums/full-...handbooks.html

Frugal Horn Mk3: Frugel-Horn Mk3 Builds & Build Questions

My latest build, Pappa's TL: http://www.diyaudio.com/forums/full-...appa-s-tl.html (hey, I couldn't resist)

Many, many more out there. Just start searching/reading.

Cheers, Jim
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Old 9th October 2013, 06:45 PM   #6
crcook is offline crcook  United States
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Thanks to all for comments. Bit more info to help narrow down suggestions. I have a smallish room, 15'wide (glass on one side) x 20' long (opening into kitchen) and 9-10' high ceilings - some placement challenges. Neither speaker will be in a corner, both will be about 1 foot from a back wall. Spacing is about 8 feet apart. Driving with Pass F5 (when finished), homebrew digital amp, and ST35 EL84 clone, all with 25-30 wpc. Listen to classical, older rock, female vocals, and some jazz. Moderate levels, not blowing out the windows.

I am still digging through this site. More searching found Madisound site and saw the two flatpack kits with Fostex drivers. Also found dyi threads with comments and pictures of finished speakers. Very helpful.

Posts on the BK12m kit look good, may be what I can use. Size is good, could go a bit taller or wider. I could add sub, if needed. Only issue is aesthetic, not crazy about the front baffle opening of the BK12m style. Am looking at other designs to see options. Obviously, a minor point, as the sound for the buck is what I am most interested in.

I have access to some high end woodworking equipment (not cmc) and have basic skills to make something. Made a pair of Ariel ME2s 8 years ago. Still cleaning MDF dust out of things.

Would like to see speakers similar to BK12 or 16, with different cabinet styles. I appears that I am limited to 4-5 inch FR drivers. Suggestions and links welcome.

I hope to spend some more time Goggling this weekend.

Last edited by crcook; 9th October 2013 at 06:47 PM.
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Old 9th October 2013, 07:11 PM   #7
Jim Shearer is offline Jim Shearer  United States
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crcook,

FWIW, when listening to old rock (just finished playing Paul Simon's Graceland), I prefer to use either a 6" to 8" driver or add a sub if using 4" to 4.5" driver. The smaller driver can't really do justice to a kick drum at anything more than modest SPL, IMO.

In a small room with the cabinet near the front wall, I suggest looking at Metronomes--small foot print, high WAF. I made a Met with Fostex FE167e (now discontinued, but FF165wk would probably be even better), and find it a good all around speaker.

And since you need to be near a wall, why not right up against it? Thinking FF165wk in a BIB.

Cheers, Jim
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Old 9th October 2013, 07:35 PM   #8
planet10 is offline planet10  Canada
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New to full Range- Questions about Fostex
The power you have does not preclude the use of the less efficient FF series, or looking at any number of FRs, like on of the recently released Mark Audio A10s. The Pensil10p is a fairly easy build and on the same order of size as the BK12m (same designer too)

dave
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Old 9th October 2013, 08:06 PM   #9
chrisb is online now chrisb
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+2 on the Alpair 10P - you've got more than enough power - I found them to be a great match with Tubelab SimplePP (pentode) - essentially same power range as an ST35 clone

As Dave says, the Pensil is a darn simple build, and for a bit more character, you might also want to consider the FH-XL, another design by Dr Moose and Professor Dlugos. A great performing rear mouth design, it does have a much larger foot print than the Pensil though.

If the aesthetics of any front vent / port design are a bother, (the Pensil's are at the bottom, but not for aesthetic reasons) I guess you could always vent rearwards, but you'd need a minimal clearance from the wall.

And I'd probably be remiss for not mentioning my personal favorite cute little floorstander - the Castle Microtower - dual 4" drivers.
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Last edited by chrisb; 9th October 2013 at 08:16 PM.
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Old 9th October 2013, 09:03 PM   #10
Inductor is online now Inductor  Portugal
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Quote:
Originally Posted by planet10 View Post
Not very well in a BR, it want sto be in a horn. If you want a BR FF165wk is more appropriate.

dave
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http://www.fostexinternational.com/d...s/pdf/ffwk.pdf
http://www.diyaudio.com/forums/full-...ach-other.html
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