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-   -   Considerations for building a TWW 2-Way System (http://www.diyaudio.com/forums/multi-way/91382-considerations-building-tww-2-way-system.html)

plamalice 1st December 2006 02:44 PM

Considerations for building a TWW 2-Way System
 
Hi there,

I've been looking all over for information/documentation on building a 2-Way speaker with 2 woofers. (TWW Configuration)

How will the xover network be affected (other than the load of course), what will become of the Re and all other drive parameters when hooked in series/parrallel... What about the dB/W...

I've found a lot of designs incorporating 2 woofers in either a D'appolito config or TWW but haven't found any pertinent documentation on the subject.

Anyone know of a site/resource where i might find such information ?

Thanks a lot

sreten 1st December 2006 03:02 PM

Hi,

try looking for information on 2.5 way speakers.

:)/sreten.

69stingray 4th December 2006 11:53 PM

Here is one:

http://www.partsexpress.com/projects...e/ubt/ubt.html

Here is another:

http://www.zaphaudio.com/Waveguidetmm.html

s7horton 5th December 2006 12:37 PM

You could use a design similar to mine (2 1/2 way) and use only one enclosure instead of two. (one sealed for mid, and one ported for woofer) It'd be cheaper as well since you wouldn' t need the crossover on the bottom woofer.

http://www.htguide.com/forum/showthread.php4?t=23211

sreten 5th December 2006 01:40 PM

Quote:

Originally posted by s7horton
You could use a design similar to mine (2 1/2 way) and use only one enclosure instead of two. (one sealed for mid, and one ported for woofer) It'd be cheaper as well since you wouldn' t need the crossover on the bottom woofer.


Hi, what your saying doesn't make any sense, :)/sreten.

s7horton 7th December 2006 12:09 PM

If you viewed the thread, you would notice there is an upper enclosure for the midbass and tweeter and a separate chamber, ported, for the woofer. WIth a two-way, I would put everything in the same chamber, ported.

My crossover is made of three components. One for the tweeter, one for the mid and one for the .5 woofer. If you made a two way, you wouldn't need the .5 portion of the crossover.

Make sense?

sreten 7th December 2006 01:27 PM

Quote:

Originally posted by s7horton
If you viewed the thread, you would notice there is an upper enclosure for the midbass and tweeter and a separate chamber, ported, for the woofer. WIth a two-way, I would put everything in the same chamber, ported.

My crossover is made of three components. One for the tweeter, one for the mid and one for the .5 woofer. If you made a two way, you wouldn't need the .5 portion of the crossover.

Make sense?

Hi,

More sense. You don't need separate chambers for a 2.5 way. Its
a design choice. You can also have separate chambers for a 2-way.

:)/sreten.

Raoul 7th December 2006 04:51 PM

Hi s7horton,

Zaph actually did some tests that imply seperate enclosures for a 2.5 way may not be necessary:

http://zaphaudio.com/commonenclosuretest.html

Not saying that building two enclosures is a bad thing, but The results are pretty interesting.

s7horton 8th December 2006 12:17 PM

I don't disagree. It's not required. But I like the sound I get with a larger, ported chamber for the bottom end. It's tuned for that driver.

TurboFC3S 8th December 2006 04:04 PM

My recent build is a 2.5 way with GR M-165x drivers ... one cab I did both woofers in a 1.65 cu/ft vented - the other was one driver in a .6 sealed, the other in a 1 cu/ft vented.

The 1.6 cu/ft vented version produced significantly more bass. I did quick measurements with my ECM8000 and Speaker Workshop ... but bass measurements are somewhat inconclusive. I trusted my ears more than the measurement, and they told me the version with both drivers in a shared larger enclosure was the way to go.

That's just one example though, based on my space and cabinet size limitations.


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