Re: Some new pictures at Lambda Acoustics - Unity - wonder how TD15 will work and what price? - Mark Seaton - High Efficiency Speaker Asylum

High Efficiency Speaker Asylum

Need speakers that can rock with just one watt? You found da place.

Re: Some new pictures at Lambda Acoustics - Unity - wonder how TD15 will work and what price?

In Reply to: Re: Some new pictures at Lambda Acoustics - Unity - wonder how TD15 will work and what price? posted by freddyi on April 4, 2001 at 17:53:22:

Freddyi-
The speakers pictured use 4 of the TD 15 series woofers on the front face with 4 15" PRs on the back. Nick's been working on the TD woofer for a while now, and has finally given out some specs for 2 of the iterations via e-mail. I'll post them later when I dig them up. Right now there is one model with about 94dB eff. and another version of the same driver with a well placed 40g of mass loading that brings efficiency down to ~92dB for those wanting nicer F3 numbers.
With that monsterous aluminum phase plug, and all the other features in the motor, it has proven to be VERY good at dissipating power. When Nick tested it at ~200W RMS for over an hour, he returned to find the phase plug idling at over 140 deg. F! Much more importantly, the DCR of the driver had only shifted ~10%! Nick will also be making a very high efficiency version with an accordian surround and shorter Xmax, and I hear he has his sights on 99dB+.
Obviously everyone here likes the ideal of high efficiency, but with the thermal performance this woofer has been doing, it could make the 92-94dB drivers easily enough for most people. For those who have a very high efficiency top end to their system, and can't fit closet sized bass horns, this could be a really hot option to fill in the bottom end when equipped with some moderate power.
My Unity speaker will eventually have a pair of TD 15 woofers in a sealed box underneath each Unity horn. The F3 should be around 65Hz, which will be perfect to mate to my sub, and should be around 100dB/2.83V even with the passive XO.... of course active is in the plans, but much further out in time.
Mark Seaton

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Follow Ups Full Thread

Topic - Some new pictures at Lambda Acoustics - Unity - Mark Seaton 17:40:57 04/4/01 (7)

Very Strange..... hmmmmmmm.. - Mike Bates 23:11:59 04/4/01 (1)

Re: Very Strange..... hmmmmmmm.. - Mark Seaton 12:34:14 04/5/01 (0)

Re: Some new pictures at Lambda Acoustics - Unity - wonder how TD15 will work and what price? - freddyi 17:53:22 04/4/01 (4)

Re: Some new pictures at Lambda Acoustics - Unity - wonder how TD15 will work and what price? - Mark Seaton 04/4/0119:03:56 04/4/01 (3)

excellent-TD15 @94dB - nice compromise - freddyi 21:39:06 04/4/01 (2)

Re: excellent-TD15 @94dB - nice compromise - Mark Seaton 13:28:49 04/5/01 (0)

Re: excellent-TD15 @94dB - nice compromise - Mark Seaton 11:22:04 04/5/01 (0)

Follow Ups

Re: Some new pictures at Lambda Acoustics - Unity - wonder how TD15 will work and what price? - Mark Seaton 04/4/0119:03:56 04/4/01 (3)

excellent-TD15 @94dB - nice compromise - freddyi 21:39:06 04/4/01 (2)

Re: excellent-TD15 @94dB - nice compromise - Mark Seaton 13:28:49 04/5/01 (0)

Re: excellent-TD15 @94dB - nice compromise - Mark Seaton 11:22:04 04/5/01 (0)

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