The crossovers and every wire in your speakers already "vibrate like hell" as does the amp and everything else in a powered subwoofer or speaker...however, no problemo, and powered speakers like ATCs and others (and every powered PA box hung over yer head at live events) have garnered praise from plenty with well tuned earballs. Kinda makes the Anti Vibration Industry look silly, don't it?. I've owned tube combo guitar amps (meaning the fragile little snowflake of a tube amp is in the box with the speaker...horrors!) that were unmodified from 75 years ago that sound sublime, and my 2 el cheapo used RELs also have been doing their job well for years in spite of a hellish nightmare of self induced vibration.