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Old 12th January 2011, 10:15 PM   #1
josha is offline josha  United Kingdom
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Default Fostex 103e as center speaker

Hi - I wondered if anyone had any thoughts on using the 103's in a center speaker?

I've got a couple spare as the dogs keep knocking the zigmahornet's over

It's a small room so I'm not after massive volume, there will also be a sub, decent fronts, surrounds and rears - I'm just missing the center. These would seem ideal for mostly vocal stuff, but a search hasn't thrown anything up, maybe I'm missing something?

Using WinISD, I planned to use both in an 8ltr(ish) ported box, or maybe a solo if I can find the time to build it.

Any thoughts?

Cheers
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Old 13th January 2011, 02:47 AM   #2
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My 107e speaks (shielded version of the 103e) came with a plan for a recommended double bass reflex box. It uses three drivers and appears to be aimed at a HT center channel solution. No idea what it sounds like. I would think the plan would be available through Madisound or some other link to the Fostex plans.

linky

http://www.madisound.com/pdf/fostexc...7e_revencl.pdf

Last edited by chromenuts; 13th January 2011 at 02:53 AM.
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Old 13th January 2011, 03:00 AM   #3
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One FE103 should make a fine centre channel.

dave
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Old 13th January 2011, 05:45 AM   #4
josha is offline josha  United Kingdom
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I'd forgotten the 107e was a shielded 103! (That throws up a few more results). The double reflex looks like the sort of thing I had in mind, I'll give that a go with two drivers, and try a single driver as well in a ported box and we'll see how it goes.

Appreciate your help, cheers.
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Old 13th January 2011, 06:48 AM   #5
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If you use more than one driver they should be arrared vertically. The whole horizontal driver thing is from the marketing departments.

dave
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Old 13th January 2011, 09:24 AM   #6
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Hi,
the 3 FE107E horizontal array is a good example of : how NOT to build a speaker...
-5dB valley at 1,6kHz and +5dB peak at 3,2kHz, impossible to correct by a notch filter.
Similar situation with 2 speakers...

I would use a single speaker in a flat box, with 2 round ports left and right for a nice symmetric look

Joe
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Old 14th January 2011, 10:31 PM   #7
josha is offline josha  United Kingdom
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Sounds like a plan! Single driver it is then - no space for two in a vertical. I was planning two horizontally arranged but closely spaced with the ports left and right (for that symmetric look!).

I understand why two and three way are bad news in a horizontal arrangement but with identical drivers, i don't know - is it less focused? Maybe there's no real benefit in having multiple drivers - I need to do more homework on this ;o)

Thanks for your help again!
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Old 16th January 2011, 09:12 AM   #8
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Here is an idea - two center speakers, each with a single 103e - one below the screen and one above it.
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Old 16th January 2011, 08:01 PM   #9
jc56043 is offline jc56043  Canada
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The 3xFE107 in a double bass reflex box looks cool, though I am unable to figure out how to wire up 3 drivers. Has anyone any idea? If laying the speaker flat is no good, then I can always stand it up on one end.

Cheers
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Old 16th January 2011, 08:44 PM   #10
josha is offline josha  United Kingdom
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You know, there's some mention of that fostex enclosure on another forum and it seems it may be designed to act as the center, left & right channels together, that would resolve your wiring concerns jc!

That can't be right though can it? Three channels with a common chamber and two ports?

Nice idea crossblade but I'm pushing my luck with the wife as it is - this center might already be a speaker to far, prey I don't resort to using a pre-out and the tv speaker (
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