I own one of sonic's sub boxes.
I bought one awhile back for my infinity 104.7w. It's 1cf. sealed for a 10 inch sub.
Very well built, 3/4mdf, nice terminal cups. Only thing I wasnt to sure about was the quality of the internal sealant. I re-did the inside with caulk just to make sure.
I can take some pics of it if u want. Still have it.
I bought one awhile back for my infinity 104.7w. It's 1cf. sealed for a 10 inch sub.
Very well built, 3/4mdf, nice terminal cups. Only thing I wasnt to sure about was the quality of the internal sealant. I re-did the inside with caulk just to make sure.
I can take some pics of it if u want. Still have it.