just tried it, turned it right up, no cracks yet. but it vibrates the filler like fuck.
gona gave to mix fiberglass srands in with filler, see if that will stop it cracking. might be ok with just the 1 cabinet wth 2 subs. but i doubt it will last with 2 more cabinets.
haha, i doubt if i will last with 2 more cabinets.