Decided to make some new cabinets for some old bose speakers, here is what I did. First, I bought these when I was 17, 24 years ago and they have been actually a good rear 5.1 speaker. That being said.... I had no idea they could have been much better, go figure.
I made some ported 1.25cuft cabinets and tuned them at 40-45hz (3” port 5.25” long) kept the xover for now and WOW. Ok, not off the wall good but night and day better. The original cabinets were a muddy mess and had very little imaging and now it’s not a muddy mess. I’m pretty sure the MTM design is what they should have done to begin with but we are taking Bose after all. I do have a question for anybody who knows xover design, 1. What the hell is the little (coil?) on the tweeter on the third picture? It was wired.... coil - cap - bulb - tweeter and the 6 1/2’ were run full range. 2. My high end is a little subdued and could be a little brighter, any advice (make new xovers, new tweeter?). Tweeter is 3.4 ohm and 6 1/2’s are 5.4ohm each for a total cabinet of 4ohms.
Rating - 6 - original cabinet was a terrible front speaker and was a great/good rear/side instead, speakers drivers were not the worst I’ve seen.
New MTM rating -8- moving the speakers into this design helped dramatically, made it a great full range tower speaker with good on and off axis sound. Lacking in the brightness though (very subdued high end), making new xovers probably would help or possibly changing out tweeter.
Last edited by Audiophile75; 05-28-2018 at 12:58 PM.