I'm buying an external amp.
I normally listen at -12db
How much watts of power does each Invisa HTR7000 need
Also same Q for SuperSat3, SuperSat50, and Aon3 - how much do they each need at that volume?

Hi cgott42, First, please keep in mind that it's better to have too much clean power available, than to have a lower powered amplifier - driven too hard - or driven into distortion. Next, the amount of power needed will depend a bit on how large your listening room is...and how "loud is loud" - or how loud you normally play your system. (-10 db is a relative term with different amplifiers.) In most applications, I would recommend using a high quality, high current amplifier with at least 125 watts per channel. (An amplifier with 125 - 200 watts per channel should work well.) Happy Listening!