For some time now I have contemplated experimenting with some different speaker cab options. This thread has pushed me forward: https://www.tdpri.com/threads/four-5”-micro-bassman-build.1070972/ I have decided to make a 4x8" speaker cab. First order of business is to purchase the speakers. I don't see many options in the 8" size. I think I want 8 ohm so that the assembled impedance is 8 ohm. Options that I see: 1. Weber "Ceramic Signature 8" (15W) 2. Jensen C8R (8 ohm, 25W) 3. Celestion "Eight 15" (15W) I think the price is pretty similar for all 3, but I am leaning toward the Weber. They state that the Signature 8 is intended to have earlier breakup than the 8S. Any thoughts, advice, experience to share? Cabinet will probably be made from 1x12 pine walls with maybe a 1/2" plywood baffle. So probably about 9" or 10" deep from the back of the baffle. Was thinking of making it so that it could be both closed back or semi open back. Inside dimensions will likely by 20"x20" so the size will not be much larger than my existing 1x12 cabs. You can go mad trying to make sense of all the information on what internal volume is appropriate for closed back. For closed back it would have 3600 to 4000 cubic inches internal volume. I saw one recent post that had the info that the semi-open back area should be about the area of the speaker, so for four 8", that will be about 20" wide by 10" tall opening in the back. More to come on that.