MK’s ML TQWT project

[greenie512]

I’m just awaiting the delivery of a pair of Fostex FE167’s to built Martins ML TQWT design see - http://www.quarter-wave.com/Project02/Project02.html for those who haven’t see it?

I think I saw a thread where Scott mentioned he’d built 4 sets of these – so this might be directed toward him!

1. There’s no bracing shown on the design. Now I suppose because of the front/back panel tapers that may not be necessary. However would a side-side brace be useful? Also I’m now hooked on bracing the driver front to back – so think I’ll put a small section in to achieve this.

2. Driver sits +30” off the floor, to my mind this is 6-8” below ear level – is this a big issue. Would it be a good idea to have a small base plinth/legs to rise the driver the extra height?

Cheers - Phil

[Scottmoose]

A bracing panel might be useful, though the SPLs this enclosure generates are fairly modest, so it's not especially critical.

I never bothered raising the cabinet, as the drivers are pretty much at my regular listening height. You could always angle it backward slightly -a piece of additional 3/4in material under the front of the base should do the trick. Still, if you're worried, you can certainly bulid up a plinth. I'd make sure it's solid though -resonant cavities under an MLTQWT is not a good plan IMO.

[irbow]

Hi I built his ML-TL design and as long as you use decent glue they will be very rigid, just remember you can't have too many clamps when you put them together!

As for a plinth to raise them, I would wait and see, I presume you'll listen to them before you apply finishes to the wood etc to make sure they're Ok so judge then if you need a plinth.

[greenie512]

Iain – Yep, I wait quite a while before finishing my cabs, in fact Scott’s Small Thor’s currently sit in my livening room in their naked glory (plus grubby finger/glue marks). I have a great supplier of paper backed veneer on the Gold Coast and I just can not decide on the “tree” to use. So yep, I’ll wait, build the speakers as designed and see if they need raising once they are running.

[planet10]

Originally posted by greenie512
Also I’m now hooked on bracing the driver front to back – so think I’ll put a small section in to achieve this.

Something Chris & i do at every opportunity...

Have you seen these variations in shapes?

http://www.t-linespeakers.org/FALL/bipolar/index.html



You'd also be pretty safe stuffing the dimensions into a Metronome shape

dave