Hello,

Looking for any suggestions on the design of adjustable ports - any photos or drawings would be great. I am in the process of building up some 620 cabinets for my 604 drivers (re-purposing some quite tattered Magnificents i found locally), and would like to have the flexibility to alter the port size to properly tune the cabinets. I have the information on recommended port size for 9 cu ft cabinets, but I am sure mine will not be exactly 9, and it is likely all 9 cu ft cabinets are not created equal...... Trying to cut the port larger after the fact, or putting in 'shims' to decrease port size, seems a bit haphazard. I would like to design some flexibility in, if possible.

I also have a few bits that may be of interest to others, such as the bass horn woodwork (which came out quite cleanly). Probably do a post once I have done both sides, and have a better idea of what is there..... All of the drivers and crossovers were long gone, do no need to ask about those.

regards -- Roger