[robseyes]

Oh goody... I get to post first. :bigsmile:

These are the properties that I'd like to see on a line of HT drivers. I'm one of the people who is willing to pay a bit for some extra quality so budgetary concerns aren't really on my radar.

High displacement for the low bass in soundtracks and low distortion, with high SQ and good upper end bass extension for blending with the mains. Versatility so that they can be used in resonant and sealed designs, with an emphasis on small sealed box requirements. 30mm or more one way would be great and the more the better. It doesn't need to be as crazy as a XXX, but massive displacement headroom and clearances like that is a plus. Keep it linear and low distortion too. I'd like to see a linear motor system used (split coil maybe/ counter coil?) to that end. Quiet high excursion operation. Also low and well controlled inductance through whatever means necessary(shorting rings/ counter coil, whatever). Solid venting and cooling with high thermal power handling. High BL to keep the efficiency up and the box sizes reasonable. I know that using a linear motor automatically hurts you there but it can be done. I'd like to see it have a neo based motor too. Finally, keep it plain and classy looking. Offer it all the way up to a 21 or 22" like the one we already discussed.

That'll only be what? About $1500 per driver? :thud:

Abbreviated version...

1. Extreme linearity/High displacement
2. High BL
3. Well controlled inductance
4. High thermal power handling/venting/cooling
5. Low self noise at high excursion
6. Rugged
7. Reasonable box size requirements
8. Versatile
9. Classy looking

Perhaps you could do 60% of that in a more budget oriented line?

I agree whole heartily! Perhaps something similar to the original Avalanche series with a little more BL (especially for the 18), at least 30 mm of Xmax, better upper bass response (lower inductance),all for a somewhat reasonable price point ($275-$350).Not sure if that is reasonable:dontknow:, but it sure would be cool. :yay:

 

[robseyes]

I actually had a chance to do some FEA for this last night and came up with a nice little solution (havent had a chance in long time to do FEA for fun...) I definitely think we can meet those goals at a reasonable price point. Only sticking point is the baskets... but I do have a solution for that as well with some plate and one of the CNCs Need to check on a patent as I have a feeling that there might be something covered on how I want to do things already. If not, Ill see about getting one going.

What were you thinking? A driver that could out-do an LMS or a more economical series that has 30+ mm of x-max & lower inductance?.........Is it too much to ask for a little efiiciency too?:whistling:

(i know i know there are tradeoffs in all designs):thud:

 

[robseyes]

Robseyes,

Getting decent efficiency (low mms, High BL), really long linear throw and low inductance all in one is the ticket...usually tricky and expensive to do. Some of these fight against each other.

I know, I know, but he did ask you know!:heehee:

By the way, I don't post very often, but I really have enjoyed reading about your Re xxx build. Very well designed & nicely implemented. I can't wait to hear your impressions of multiple sealed with those monsters.:hsd: Hopefully a few pics too!

Bob

 

[robseyes]

Could you do a tall rubber surround similar to the one TC uses? Or do they have that under patent? It seems like it works pretty well & just flat out looks cool!