Gpa 416-8c

[gortnipper]

It is illegal to put a 604 in a 1.5 cu ft box!

10 cf box...

Using the measured plus derived specs [attached], it will need to be tuned lower [Fs] to get a 'close enough' similar response, so will probably need at least a 6” long vent.

GM

Thanks. And keep the 3.5R or no?