Originally Posted by
David Ketley
I have a pair of boxes built by cabinet maker to my measurements resulting in 10.06 cubic feet enclosures for a pair of JBL 2245s with new JBL cones. I need to take off the area for the cones .3 cubic Ft and additional bracing say .7 cubic Ft
The ports are two x 6” for each cabinet and the design in conjunction with Wilmslow audio UK gave a port length of 11.5. I’m looking to add fill to about 10-15%
On the subject of fill I understand a good substitute for fiberglass is lamb’s wool insulation?
As I’m using a Marchand 4 way active crossover (2245, 2123, 2446, 2405) I understand I might need a series .5 Ohm resister to bring the QTs up to the required value but I don’t have a programme to model the actual figures.
Can you confirm the figures I have given? Have I got the right idea?