SS I used some pvc and lathed it down to slide in the v2 parts and bored it out for the speaker. I just glued it in. Also I had a couple speakers have the surrounds come off the baskets so put a little glue around the edge just to reinforce it a little. Also when you solder on, the tinsel leads want to just pop off so prepare for that. The 20mm speakers are pretty loud considering their size though.