Harman Kardon 3390 & 3490

Found both of these receivers for cheap price.The 3490, 120 W/C +/- 45 amps, the amperage I find hard to believe, for $299, and 3390 80 W/C +/- 40 amps.

I listen at 92/94 db or less, most all the time.I like my hearing real well!The tube amp I've used is 22 W/C and when I play music at 94/95 db for a few seconds there seems to be more left on the tube amp. I sit 10' from each speaker.I used an SPL meter to check the loudness. The speakers are Vandersteen 2CI's.Oh, the room is 15 x 27 with door ways at the opposite end of the room.
Thanks for any help you may afford me.
Harley