been looking at the rr2150 for about a year,was impressed with the retro look and all the features, so i ordered one, loved it except for one major detail, compared to my other recievers.carver 752,carver mx 130 marantz 2220b ,kenwood kr 7600 and a gte/sylvania 2400 the rr2150 was lacking on tonal punch on every other recievier i mentioned with bass and treble set at flat ingageing the loudness switch and adding the bass control produced lots of bass punch with th rr2150 it just wasnt there even with everything upall the way,yes i had the cross over on back set to bypass aftera week of compareing against above mentioned recievers i was about to pack it up and thought maybe its the amp section that didnt have the punch so i tried it in preamp mode against my parasound 850 pre with a 205wpc parasound amp and klipschorn apkrs .....same thing no bass punch with tone controls cranked full blast so sadly i returned it