SI's modular CNC machined aluminum basket shallow 12" development

[Electrodynamic]

I have been devloping this driver for at least six months but today has marked the culmination of the trials. This may not be a very "data-bass" driver but I think/know it performs well within its design criteria (target of 0.5 to 0.7 ft^3 sealed). I thought you guys might like the direction I've taken the prototype:

 

I built the prototype today and everything measured great. Here are pictures from the build this afternoon followed by a list of preliminary T/S's. I say 'preliminary' because after Patrick tests it for Klippel it will be thoroughly broken in and the Qt will be lower, Vas a little larger, Fs a little lower, etc. 

 

Here are pictures:

 

New spider landing/motor carrier on the left compared to the previous spider landing/motor carrier on the right:

 

Modular basket assembled onto the new motor:

 

Side shot without moving parts:

 

Side shot with most of the moving parts [minus the dome]:

 

Completed shots:

 

 

I used 4 AWG terminals for this prototype but I will not be using terminals this big on production. There will be 10 AWG terminals on the production drivers that look much better than these monsters:

 

 

T/S Parameters:

 

Re: 3.6 Ohms

Fs: 25.6 Hz

Qes: .44

Qms: 3.42

Qts: 0.39

Le: 1.8 mH

Sd: 82.51 in^2 (53235.9 mm^2)

Vas: 44.5 L

BL: 21.2

Mms: 348.1 g

Cms: 110 uM/N

SPL (1W/1M): 84.0 dB

SPL (2.83 V/1M): 87.4 dB

 

Preliminary recommended enclosures are:

Sealed: 0.5 to 0.7 ft^3

Ported: 1.4 ft^3 tuned to 25 Hz

[Infrasonic]

Swweeeettt.

 

Is this the new BM driver?

[Electrodynamic]

Swweeeettt.

 

Is this the new BM driver?

 

...a version of it, yes. This is a modular CNC machined prototype version. Tack on an additional $1,200 to the cost of the regular driver and you can have what is pictured.  

[Infrasonic]

Good lord.

 

Well, it does looks pretty slick! Fancy, shiny, machined stuff. I love it.