Concentric driver

jr@mac

At DDIY this year, Brad brought a pair of speakers using a 4" concentric T/M module. I briefly discussed the possibility of a group buy - who is interested?

jhollander

I'd like to see some more details, so yea half way interested

audioanarchist

I'm in

jr@mac

I plan on buying a pair for testing, when that process is done I will proceed. 

kennyk

I'm interested, but after testing.

ani_101

Interested....

Mzisserson

Any further details on it?

kennyk

Worked well in that design. I could live with it.

D1PP1N

Please forgive my ignorance but is Concentric  like coaxial? Like woofer and tweeter in one driver?

jr@mac

Ill get a pair here and run them through their paces. Will be about $60 fob for one pair - price will scale down considerably with larger orders - I only bring it up because it ain't cheap doing R&D. 

Nicholas_23

Did I hear right , that these also came in different sizes?

ani_101

They come in did sizes and it is concentric or coaxial, tweeter inside the mid. Thanks JR....

R-Carpenter

What are they?

ani_101

I have not looked, but Brad was saying they come in all sizes from 3" all the way to 15".

Bryan@MAC

I know pics don't give many details but it's the driver on top. The bottom is the TB 5" sub driver. 

jr@mac

I'll start with the 4" model. 

Face

R-Carpenter said:

What are they?

I believe Chinese copies of Tannoy.

JasonP

I'm interested

R-Carpenter

Face said:

R-Carpenter said:

What are they?

I believe Chinese copies of Tannoy.

I could use a pair .

jr@mac

The 3" model is less than half the price of the 4", and the 5" model is less than $2 more. The 4" seems to be priced somewhat idiotically at this time. 

So, any interest in spending a few dollars more and seeing what the 5" can do, or spending a lot less and see what a 3" can do? The way these are charged shipping is weird - it is reasonable for one 5", for example, at $16 shipping plus $27 for the driver, but a pair of them jumps to $50 for shipping so a pair of the 5" will be over $100 to my door. 

The 3" has the weird shipping jump after 4 pieces - 4 pieces is $65 to my door, 5 pieces is almost $100.

So for one pair to my door the following applies:

3" is $35
4" is $72
5" is $106

I'll be willing to eat the first pair for testing purposes, but the cost does not scale down as I thought it would, at least not via there online vendor of choice. I am trying to contact the factory direct to see if they will ship a quantity at a price, but my experience has been that they tend to want to send me two samples and then hit me with a MOQ of 1000 pieces - and as attractive as it sounds to go full time into the driver selling business, I do not have the capital or the time to do so at this point in my life. 

So let me know what size you guys are most interested in and I will go from there. 

R-Carpenter

I could go for a pair of 5"

JasonP

I agree with Roman, 5" sounds good.

ani_101

I am good for any size, really depends on what the tweeter and the mid can do. If the tweeter can meet the 5" then it is preferred for what I suppose could be better power handling and decent xmax and sensitivity, which would be lacking in smaller ones. So

jr@mac

It will be a month before I can spend $100 doing R&D, by the way. 

R-Carpenter

Do you want to test my pair JR?

audioanarchist

My first choice would be a 4" and my second would be the 5"

Mzisserson

Where that tweeter can cross may be the best way to detirmine the sweet-spot for the woofer size. 

audioanarchist

I'm gonna go out on a limb and assume anything bigger then a 5" would be a bit wonky.

greywarden

i have a weird love affair with coax and concentric drivers, that being said I haven't spent more than $12 on anything frivolous in months

S7910

I'm in for a pair. Either 4" or 5" is fine.

kennyk

5" for me.