Hello iKerry-
I've contacted Klipsch tech support. I'll share any reply.
EDIT @ 16:51 EDT
Thanks muchly DizRotus,
Jon from Klipsch promptly replied as follows:
"Power consumption is less than a LED nightlight. They must remain on when not in use because they go into idle after 15 minutes. Lastly, there is no gain controls besides the one on the control pod. The only other option would be to have an EQ on your computer which if turned down would achieve what you are looking for. Let me know if you have any other questions. Great stuff on the forums by the way.
Thanks,
When replying to this email please include all replies.
Jon Benefiel - Headphone and Personal Audio Support Rep."
I guess I'll stop worrying, plus I can now unplug my Big Bird nightlight.