the gasket on the altec drivers is so squishy compared with the TAD gasket... all these things must have an effect.
given that i will not be overdriving the speakers is there any way to determine from their specification exactly how far the speaker will travel forward at max displacement?
The plywood/ Laser treatment sounds good . I would use very good quality marine or birch ply though .
Where on this little island are you ?
Yeah I use birch ply in all my speaker builds, not marine though - that's crazy expensive now...
It might be nice to have a contact for this re-coner you use - the guy up here I go to is often away fixing tape machines and desks around the world, and even when he is here it's real hard to pin him down sometime. I come to London to see tech guys for some of my gear so it might be a possibility when i recone get round to using my 1603s. I have four 1601's ready to go and i kinda like the 421's for now in my monitors so it's not pressing.
What cabs will you be using the 1603's in? will they be mounted in front of the baffle?!
I think you advised me to go 4-way (not including sub) in my setup in a previous post. Unfortunately this is not an option as there is limited space and we need room for dancing!
Do you have any opinions on how thick this new gasket/ring should be - i'm looking at 7mm at the moment.
I know Leeds very well . I lived in Kirkstall ,by the Abby -spent 8 years up there playing semi-pro cricket ,doing a degree and working .
Now I live in Dulwich SE London .
My cabinet ..... ? no idea yet . Something bespoke anyway . I will be using the Radian / Truextent combo and the 1603 . Its a long term project.
Guido will design the networks for it . I'll stick to a 2-way . Unless I want to spend serious amounts of dosh I don't think I can improve on the basic 2-way . Besides, I have done the big 4-way thing ,but alas,I don't have the room any more .
Back on topic !
I guess your stuck with the original aperture ,which is 15" ? now you need to clear the surround for rear mounting as the TAD is 16" ? I would stick to the ply idea . I can't see any problem as long as you keep to the 7 mm minimum ! If the cone travels more than that ..... you have just blown the Woof .. LOL
Pics really help to visualise mate !
Guido is on here ,contact him via PM or http://www.behringer-electric.de/
We'll have a drink the next time your down my way !
Look at the A7 - the speaker is hidden partially behind the baffle.
The Xmax of the TADs is 8mm
The Xmax for the Altec is 0.12 inches or 3mm
So i feel I may be 1mm short - and i really REALLY don't want to damage these TAD drivers as they cost an arm and a leg.
So i could use 6mm ply with 1mm neoprene on each side = 8mm
or use 9mm ply with 1mm neoprene on the side meeting the baffle = 10mm
so boring, but so important.
now i look closer at the TAD spec i see something else:
- Max. Excursion Before Damage (P-P) 36,0 mm
Which would mean the driver moves forward 18mm.
that is a lot.
on the altec 515-8ghp the same figure is 0.85 inches or 22mm
meaning 11mm fwd driver movement
Then i look again at the difference in gasket (the altec it 7mm more!)
it makes me think i should use 12mm ply! no more laser cutter.
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