MLE, I think astro is wrapping up independent sale of the mixamp and exclusively selling it with the a30/40 headset. 'tis a sad day in audiophile gaming. Now the minimum price is 200 dollars for the mixamp plus the cancerous a30 headset.
A resounding "Yes". You need an astro mixamp hooked up to the ps3 optical out, then plug the headphones into the mixamp. I don't know of the jack interface on the mixamp but i think the VoIP adapter would work with if i am corect.
it can be the transformers, but as far as i know transformers buzz. i think it may just be the capacitors, and is probably not a problem.
also, wrong forum, this should be in the full size headphone amp or speaker forum.