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You want them to be your Main Front speakers, right? The news is not good. There will be some limitations because you can't extract 'processed' 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 volume level)... For connection I would run a pair of RCA cables from the VCR/DVR 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'll lose the ability to use these jacks for anything else, but few of us use them anyway. DO NOT select this function for monitoring or you lose all audio in the Onkyo.
The good news. I have a setup similar to what I think you're trying to do and it works great!
The Onkyo M-282 stereo amp for the 901's is the perfect solution. Run it with the Active EQ between the receiver Front L&R Pre-Outputs ** and the 901's amp channels.
**Onkyo SR805 Pre-Out Front >>> Bose EQ Amplifer IN
Bose EQ Amplier OUT >>> Onkyo M-282 IN
Set the Input Level on the back of the Onkyo to MAX. The receiver controls everything just fine after you run through your level setup routine again.
I was looking a the 12v triggers on both units and it looks like you only have a Zone 2 trigger so that wouldn't work for turning on your M-282. I guess you're going to have to turn it on and off the old fashioned way, like I do mine.
I wrote most of this for a different receiver, but if you account for minor differences to your receiver this will work just fine.
There's good news and bad news. The bad news you need a separate amp because a multichannel receiver with Bose 901's attached as recommended for a standard stereo receiver will only sound right in STEREO on stereo analog material. The other speakers around the room are not designed to receive its Active Equalization and if you engage your Tape Monitor you will NOT BE ABLE TO HEAR DIGITAL sources at all. Tape Monitor is for analog stereo material only and on modern AV receivers it disables any digital inputs so you really can't use the Tape Monitor circuit or attached devices for modern digital sources. However, you can still employ the various DSP options to spread 2-channel analog source material around the room. I do.
The good news. I have a setup similar to what you want to do and it works great! I see on the SR875 there are Pre Audio OUTS. This is easy.
A separate stereo amp for the 901's was my solution. I run a Carver AV-406 (5-channel amp) for my 901's in Front, 2 Subwoofers and the Rear Surround channel, with the Active EQ between the receiver Front L&R Outputs and the 901's amp channels. My receiver controls everything and just drives the Center and Surround speakers.
You could get by with just a stereo amp for the 901's. A Carver M-200 is a good efficient amplifier that would have you cooking just fine (2x100W). Run it with the Active EQ between the receiver Front L&R Pre-Outputs ** and the 901's amp channels.
** Front Pre Out >>> Bose EQ Amplifer IN, then Bose EQ Amplier OUT >>> new amplifier IN.
Attach the 901's to the new amp, set its volume to Max and run through your receiver's speaker level setup.
You will need to connect the speakers to the front channels as you would with any normal set(Speaker + to amp +, speaker - to amp -, etc) then you connect the special Bose equalizer through a tape monitor loop and always have the monitor loop engaged.
I would recommend a high power 2-channel amplifier, minimum 16 guage speaker wire, and of course the Bose 901 active EQ that matches the series of your speakers. I use a Yamaha mx-830 power amp & cx-830 pre amp 170 wpc They (Bose) claim that they're unlimited power handling, But if you use a amplifier with to little power and overdrive it to make it louder, you could damage the speakers or amp. With my 170 watt class A amp,the 901 series 6 will blow wind across the room. Go with the best amp you can afford! best for money- Yamaha,Denon,Onkyo!
AV receivers are notoriously incompatable for Bose 901s. The problem is the EQ charges the entire system and could damage the surround processor. Some higher end AV receivers, including some of the newer Onkyo models have pre out power in inputs on main or all seven channels.which you could install your EQ directly between pre amp & power amp without damaging processor. You can also add a two-channel amplifier to the pre out jacks front channels and use your recever's remote to control volume.
The short answer is no. The more useful answer is:
The EQ is designed so that the 901s reproduce the correct sound levels throughout hte audio spectrum. Given the size of the individual speakers (approx 4") and the lack of bottom end response for speakers that small, some tricks are used between the EQ and teh cabinet design to allow for total response from 20Hz to 20,000Hz. That being said, the power to drive the speakers comes from the amp not the EQ. The output of the EQ is not sufficient to drive speakers.