Ok, I know that Bose 901 speakers must be used with a custom Bose EQ which requires a "tape monitor" jack on your A/V receiver. I also know that just about every receiver has eliminated a tape monitor switch. I was told that if a receiver has a pre out main IN along with the main OUT then I could hook it up. My older Yamaha RX-V3300 receiver had pre out main out AND in but my new Yamaha RX-V2700 only has Pre-out OUT. BUT, here is where I'm thinking "and hoping" that I can get this to work. I don't use my receiver amp and instead I use a PARASOUND HCA-1500 THX Amplifier to drive the fronts. I just noticed today that my receiver has an RCA jack set of inputs but they also have a set of RCA OUTPUTS looped. So can I put the eq before or after the amp somehow inline?
Your instincts are correct. In fact, the only way the 901's can live in an A/V system is with dedicated amplification.
Put that old amp back to work.
This is exactly how mine are connected.
For connection I would run a pair of RCA cables from the Front L&R Audio Line OUT 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, run through the receiver's setup procedures for volume, etc and you're done.
Option 1: Adding a Separate Power Amplifier - see:
https://deercreekaudio.com/blogs-%26-updates/f/connecting-your-eq901-to-an-audio-video-receiver-avr
This option requires that you add a separate power amplifier.
1) Connect the pre-out main left and right to the EQ901 inputs 1 and 2, and the EQ901 outputs 1 and 2 to the power amplifier inputs left and right.
2) Connect your 901 speaker to the power amplifier outputs.
The equalized signal will now play through the front left and right speaker outputs in the stereo and home theater modes.

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