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Old 16th May 2006, 02:36 PM   #1
craggie is offline craggie  United Kingdom
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Default Fostex ML TL and Super T-amp

Hello,

I'm a complete newcomer to DIY speaker building having discovered the T-amp and built the Hi-Vi B3S project on www.zaphaudio.com and have been blown away by how good it is!

I've now set my sights a little higher and am looking to build the project at: http://www.quarter-wave.com/Project05/Project05.html and pair it with a super t-amp. I've got a few questions however,

1. Is 18mm MDF a suitable material?
2. What would appropriate resistor and inductor values be for the correction circuit? (or should I just experiment ?)
3. Which driver would be better, the FE126E of FE127E?
4. Are there any suppliers of parts in the UK?

Sorry if I'm displaying my ignorance with these questions, but any help you can give me is very much appreciated.

Many thanks in advance,

Stuart
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Old 16th May 2006, 03:25 PM   #2
jeremym is offline jeremym  Canada
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Default Re: Fostex ML TL and Super T-amp

>1. Is 18mm MDF a suitable material?

Sure. It will work fine. I prefer to work with plywood, because MDF makes nasty dust that is a real health hazard.

>2. What would appropriate resistor and inductor values be for the correction circuit? (or should I just experiment ?)

I'd start with the recomended circuit values, and experiment from there. Building one using a variable resistor is a good way to be able to tune the attenuation of the filter quickly while listening.


>3. Which driver would be better, the FE126E of FE127E?

That project is desinged for the FE206e or FE207e, it won't work well with the smaller drivers you mentioned. The FE207e will require less series R to flatten the response than the FE206e, and is probably the better choice when paired with the low powered T amp.

Good luck, and let us know how the build goes,

Jeremy
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Old 16th May 2006, 03:55 PM   #3
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Fostex + SI = great sound!


http://www.zillaspeak.com/systems.asp

I use the 127e straight... no resistance at all.

Peace,
Godzilla
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Old 16th May 2006, 04:12 PM   #4
craggie is offline craggie  United Kingdom
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Thanks for the responses. I got my numbers wrong in my post I'm afraid! I meant FE 206/7E! I was planning to use MDF mainly because I'm planning to get a spraypainter friend to finish them in gloss black.

Jerermy, I take it you're recommending using the values suggested forhigh damping factor correction? I'll probably use a variable resistor like you suggest for experimenting.

Will let you know how the build goes (might take me a few weeks!)

Stuart
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Old 16th May 2006, 06:53 PM   #5
phresh is offline phresh  United Kingdom
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You can get the drivers form wilmslow audio. They will send you a free catalogue if you like to.
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Old 17th May 2006, 01:09 AM   #6
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Quote:
Originally posted by craggie
Thanks for the responses. I got my numbers wrong in my post I'm afraid! I meant FE 206/7E! I was planning to use MDF mainly because I'm planning to get a spraypainter friend to finish them in gloss black.

Jerermy, I take it you're recommending using the values suggested forhigh damping factor correction? I'll probably use a variable resistor like you suggest for experimenting.

Will let you know how the build goes (might take me a few weeks!)

Stuart
Hi Stuart, I've got the 207E MLTL's powered by an AMP6.
The BSC circuit is in and out all the time whilst I play with cables and tweaks....like the Phase plugs

see other thread

I only had the Correction circuit in to try and raise the base response, to overcome the midrange glare you get off these drivers... but with the plugs and in the corner like they are....it's pretty touch and go as to whether the BSC goes back in!

Good luck on the build, mine are made out of 18mm MDF and they are plenty strong enough... not to mention Heavy enough!

Lee
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Old 20th May 2006, 02:40 PM   #7
craggie is offline craggie  United Kingdom
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Thanks again. Had a look at the thread on the phase plugs. Might give them a go once I've finished building.

Also, can anyone advise me what the alternatives to Dacron Hollofil II stuffing are, I can't seem to find anywhere that will supply it to me (without it being in either a pillow or a sleeping bag!)

Stuart
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Old 20th May 2006, 03:20 PM   #8
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Quote:
Originally posted by craggie
Thanks again. Had a look at the thread on the phase plugs. Might give them a go once I've finished building.

Also, can anyone advise me what the alternatives to Dacron Hollofil II stuffing are, I can't seem to find anywhere that will supply it to me (without it being in either a pillow or a sleeping bag!)

Stuart
Hi Stuart, you can get it from these shops in bags:
Stuffing
1 bag is all you need between the two to give you pretty much the exact density. Just roll it out, rip it in two, and fold it neatly into the rectangular shape required.

cheers

Lee
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Old 20th May 2006, 04:32 PM   #9
craggie is offline craggie  United Kingdom
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Thanks Lee,

Just a short drive away! Excellent!

Stuart
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Old 20th May 2006, 04:37 PM   #10
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Quote:
Originally posted by craggie
Thanks Lee,

Just a short drive away! Excellent!

Stuart

No worries, it's the 100% Hollow Polyester Fibre filling @ 3.99 a bag.
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