Bi-amped TL question

Hamish · 17th October 2003, 01:50 AM

I've been thinking about making a bi-amped TL using 2 seas 8" drivers (CA21RE i think they are) and a millenium tweeter. One woofer doing below 300Hz, the other up to 3000Hz or there abouts. Now, do i model it as if it were one driver or two?

GM · 17th October 2003, 03:53 AM

Two.

GM

planet10 · 17th October 2003, 04:19 AM

two.

You are driving the 0.5 8 with one amp and the other+ T with the other?

dave

Hamish · 17th October 2003, 04:23 AM

Yep. That was the plan, 100w for below 300Hx, 100w for all above (woofer + tweeter). I was thinking that it should be modeled for one driver, but i could be wrong

Hamish · 17th October 2003, 04:54 AM

OK, so two. But i would have thought you were only tuning it for the resonant frequency of one driver?

planet10 · 17th October 2003, 11:09 AM

Quote:

Originally posted by Hamish
Yep. That was the plan, 100w for below 300Hx, 100w for all above (woofer + tweeter). I was thinking that it should be modeled for one driver, but i could be wrong

So it is a 3-way and not a 2.5 way? With 2 midbasses the same, 2.5 seems to make more sense.

dave

GM · 17th October 2003, 07:43 PM

>100w for below 300Hx, 100w for all above (woofer + tweeter). I was thinking that it should be modeled for one driver, but i could be wrong

====

Do what?! Are you saying that only one driver will be used below 300Hz and that the other 8" will be in its own cab? If so, then you're right, but as Dave noted, this isn't a good plan. If they're both open in the TL, i.e. a 2.5 way, then you need to double the pipe's cross sectional area to account for the extra driver.

GM

17th October 2003, 01:50 AM	#1
Hamish diyAudio Member Join Date: Nov 2002 Location: Brisbane, Australia	Bi-amped TL question I've been thinking about making a bi-amped TL using 2 seas 8" drivers (CA21RE i think they are) and a millenium tweeter. One woofer doing below 300Hz, the other up to 3000Hz or there abouts. Now, do i model it as if it were one driver or two?

17th October 2003, 03:53 AM	#2
GM diyAudio Member Join Date: Jun 2003 Location: Chamblee, Ga.	Two. GM __________________ Loud is Beautiful if it's Clean! As always though, the usual disclaimers apply to this post's contents.

17th October 2003, 04:19 AM	#3
planet10 frugal-phile(tm) diyAudio Moderator Join Date: Oct 2001 Location: Victoria, BC, NA, Sol III Blog Entries: 4	two. You are driving the 0.5 8 with one amp and the other+ T with the other? dave __________________ community sites t-linespeakers.org, frugal-horn.com ........ commercial site planet10-HiFi p10-hifi forum here at diyA

17th October 2003, 07:43 PM	#7
GM diyAudio Member Join Date: Jun 2003 Location: Chamblee, Ga.	>100w for below 300Hx, 100w for all above (woofer + tweeter). I was thinking that it should be modeled for one driver, but i could be wrong ==== Do what?! Are you saying that only one driver will be used below 300Hz and that the other 8" will be in its own cab? If so, then you're right, but as Dave noted, this isn't a good plan. If they're both open in the TL, i.e. a 2.5 way, then you need to double the pipe's cross sectional area to account for the extra driver. GM __________________ Loud is Beautiful if it's Clean! As always though, the usual disclaimers apply to this post's contents.

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17th October 2003, 04:23 AM	#4
Hamish diyAudio Member Join Date: Nov 2002 Location: Brisbane, Australia	Yep. That was the plan, 100w for below 300Hx, 100w for all above (woofer + tweeter). I was thinking that it should be modeled for one driver, but i could be wrong

17th October 2003, 04:54 AM	#5
Hamish diyAudio Member Join Date: Nov 2002 Location: Brisbane, Australia	OK, so two. But i would have thought you were only tuning it for the resonant frequency of one driver?

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