Those speakers should be fine. They are small enough that even if they did very very slightly change shape (swell/shrink) you wouldn't hear a difference. I doubt you would see any effect on the joinery.
Speaking of stable woods to use for speakers. I had a pair of monstrous 4-way speakers custom built for the Alice Cooper Billion Dollar Babies tour as "side fill" speakers- whatever that is. The guy I bought them from was a roadie for the tour. I used them for a few years for rock music and they rocked.... they could mix concrete. Layout and driver compliment was close to a JBL 4345 but used mostly GAUSS drivers. I sold the drivers but kept the massive custom crossovers- just in case....All I know is the crossovers were made by Fergitron of N.J.. Exactly who made those speakers is still a mystery.
They were built with 1" thick 22-ply Russian Baltic Birch plywood. Heavily braced internally. Very heavy and extremely stable. Not the prettiest, but probably the best-constructed speakers I have ever owned. I have always kept the idea that someday I would build a good looking pair using the Russian Birch as a foundation and veneer with Rosewood or something easy on the eye.
Speaking of stable woods to use for speakers. I had a pair of monstrous 4-way speakers custom built for the Alice Cooper Billion Dollar Babies tour as "side fill" speakers- whatever that is. The guy I bought them from was a roadie for the tour. I used them for a few years for rock music and they rocked.... they could mix concrete. Layout and driver compliment was close to a JBL 4345 but used mostly GAUSS drivers. I sold the drivers but kept the massive custom crossovers- just in case....All I know is the crossovers were made by Fergitron of N.J.. Exactly who made those speakers is still a mystery.
They were built with 1" thick 22-ply Russian Baltic Birch plywood. Heavily braced internally. Very heavy and extremely stable. Not the prettiest, but probably the best-constructed speakers I have ever owned. I have always kept the idea that someday I would build a good looking pair using the Russian Birch as a foundation and veneer with Rosewood or something easy on the eye.