here's my story:
when i purchased the subs (used, about 6 months old) and got them hooked up for the first time, they sounded terrible.
i eventually figured out that BOTH of the dust caps where loose. (once i pulled them off it appeared that there were areas on each one that were NEVER bonded!)
i called chad (at AA) and left a message, he called back a few minutes later!
he said he'd prefer that i send them in, but i didn't have the original boxes, didn't want to pay shipping, and didn't want to wait 2 weeks.
he offered to send me a pair of dust caps and said he'd call me next week to get info on shipping them (it was 5PM friday, so understandable).
a week went by and i never heard back from him. i called and left a few messages, as well as a few e-mails.
a while later he called me, but i missed it and he left a message. i again tried to get a hold of him, but a few calls/days later and he still wouldn't pick up the phone.
meanwhile i sent an e-mail to Fi about get a set of their boob style dust caps (cause i like their logo).
he sent me a black pair and a logo'd pair. i chose to put on the logo'd pair for cosmetic reasons (not so plain).
if AA doesn't like it, that's too bad. it was their poor communication that led to this results.
if they believe different dust caps will void the warranty, that is just bad customer service.
i definitely don't think i did anything 'illegal' (in the sense that i could go to jail)
EDIT: Fi customer service >>>>> AA customer service
i like AA (i have had assassin's and arsenal's), and look forward to their new lineup coming in 07, but if i were to get a new sub it would definitely be from Fi (they are also coming out with a new sub, btw)
EDIT II: thanks for making a new thread and not turning mine into an argument.