How do I hook it up to my Surround sound reciever?

SOURCE: i have a sony str-se491

http://www.retrevo.com/support/Sony-STR-SE491-Receivers-manual/id/390bh328/t/2/

You can't activate any Tape Loop on an AVR and still have multichannel sound. Tape Loops are 2-channel analog.

You want the 901's to be your Main Front speakers, right? The news is not good.

There will be some limitations because you can't extract a 'processed' Front L-R from this receiver. The following will give you good stereo and Front L-R from the 901's but it won't allow central volume control or send them any of the DSP effects you may select. Sorry. If it had a Front L-R Pre-Out you'd be good to go for all functions and listening modes.

You'll need a separate stereo amplifier WITH ITS OWN VOLUME CONTROL for the 901's to accommodate the need for the Active EQ. Modest amps would work but at very loud volumes may go into clipping, which is bad for any speaker. I'm using only 100W for mine and it has plenty of steam for the 901's.

With this receiver we have to cheat to get the Front L-R signal out to the 901's (but it's unprocessed and at a steady MAXIMUM volume level)...

For connection I would run a pair of RCA cables from the MD/Tape Audio Out L-R OUT jacks (*) to the Active EQ's Line IN; then the EQ's Line OUT to a separate amp's Line IN. Attach the 901's to the new amp.

* You