Theyre strong and sturdy as is with 1 screw, dont need an enclosure for tweeters i think, woofer yes, tweeters? To make them even more sturdy i'll screw two 2 by 3s behind them, first one into speaker box top, 2nd into other 2 by 3, then therell be enough wood width behind the tweeters to screw the remaining top holes. BEST advice i got from this thread is to wire the 4 tweeters as 8 ohms each, ya must do that if your crossover is 8 ohms, but wiring 4 tweeters will not be louder in highs as 1, will be equal. Been 3 or more weeks, no problem at all. That new crossover i bought was a nightmare, it over heated in 50 min, had to return it for refund, then i rewired my older crossover and its great as always. Didnt need new crossover.
OK, i'll go for that toilet speaker set-
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