Which Recievers can I use with My Bose 901's ?

Mine are used with a $1 (plus shipping) eBay receiver. It's a JVC JR-S201, 35 wild animal watts per channel into 8 ohms.

I never get manage to get the volume slider more than about 1/2 of it's travel, or the neighbors in the houses next-door would complain. They're in a 1000 sq. ft. garage and of course the overhead door is usually open...

Yes, plug the equalizer into any tape loop if you don't have a pre-out/main-in connection. The equalizer should have a tape loop built in, to replace the one you're using on the receiver.

Oh, yeah. One more thing. If you have 901 Series III or IV, you can connect them to a very rare Bose receiver, and use the third speaker cable connection which will allow you to play games with the spatial perspective of the speakers.

Far as I know, ONLY the Bose receivers were equipped to take advantage of this third terminal, and when Bose quit making receivers, they quit putting the third terminal on the Series V and VI speakers.