http://nwaalabs.ipower.com/ - Complete High-speed Speaker and Material Testing

 

http://www.aespeakers.com/ - made in america speakers

 

http://ldcdiy.com/software.html - LoudSpeaker Devlopment

 

http://www.usdaudio.com/ - great information

 

http://charlesgrecco.com/index.html - very knowledgeable person

http://www.teamrocs.com/technical/ - great informative stuff

redrockacoustics.com

The ONLY certified lab by Klippel in the US to test transducers. And the ONLY lab Vance Dickason uses

Email is [email protected].

Also I'm trying to get Pat to get a Cloud running for his new transducer modeler with monthly subscriptions to help the DIY's model their frankenwoofers. Maybe a few email would help persued him. As far as I know nothing exists like this for the public.

[email protected]

Email with your personal information to receive free software from Vance Dickason to help with enclosure and crossover design. Even has a function to figure transfer function.