I've been thinking about building a set of vented boxes for my GPA 416-8c's. I would run the driver up to about 800-1.2K before crossing over to a 2" coax BMS driver on a Westlake style smith horn.
I have been doing allot reading about the Model 19 since it used the same woofer, but the GPA T/S parameters seem slightly different than the altec's parameters.
So far it looks like around 5 cu ft and a tuning of around 30 Hz might work well. This was using winisd. I have not probems going to a large box if needed.
Does any one have any suggestions?
The T/S parameters can be found here:
http://www.greatplainsaudio.com/downloads/416_8C.pdf
Thanks,
Allen