Pre amp out? Power amp in? The picture of the back of the 3390 shows pre amp and power amp RCA sockets.My reciever is on order so question is.Can I come out of the pre amp RCA sockets to a power amp?Use the 3390 pre amp? Then, Can I input the 3390 power amp with something like my Tascam recorder pre amp and drive the 3390 power amp? ok.i kept looikimg at reviews.Mister Hokie had my answer so that problem is solved .>>> The HK also has a preamp out and main amp in. This can be used for an equalizer loop or to use the receiver as a preamp for another stand alone amplifier. Nice addition for this class of receiver.