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I am not familiar either, maybe John will be back on with his knowledge on this. Hope you get to listen to them soon. I am anxious to hear another opinion on them.

Sure you do, Charles. Set the receiver speaker menu for 4.0, i.e., mains, no center, surrounds, no back surrounds, no sub. Then choose a mode(e.g., Dolby)just as if you were playing a 5.1 DVD(instead of CD)in the player.

Steve, no, all channel stereo wouldn't work. It duplicates just the mains(not what's in the "surround" channel)in the surrounds.

Edit: Charles, looking at this again, it just struck me that the DSP output is analog and is going into the multi-channel analog inputs on the receiver. So Dolby, which is a digital mode, wouldn't be correct. If your receiver is still the 708, I'll study the manual for a usable mode, but just off the top of my head, it would seem that Direct would give you the four channels coming in on the multi-channel analog inputs, not just two.

Thanks John. I knew you would be along with the answer.

if your using an onkyo receiver or pre-amp you should use either Direct or Pure Audio (pure audio is engaged via a button on the receiver/pre-amp front face) this bypasses all processing and should give you signal straight from your input either into the receivers or pre-amps DAC or if you are using your transports DAC then the signal in your receiver or pre-amp would then go straight out to the amp via said pre-outs.

for LFR purposes, i'd recommend setting them as large or full range. they got broad shoulders and can take it! happy dishing!

Thanks, John. So far, Direct is definitely only 2.0. And yes, my receiver is still the 708.

Okay, I'll study the manual. But just to be sure, you do understand that the speaker menu has to be set for four speakers, not two. It's as if you're playing both front speakers and surrounds. Without studying, it would seem that Direct would have to take all four of the analog inputs and without any processing send them out after amplification through the front speaker and surround speaker terminals to the front and back drivers.

Yes, I understand. I had it set for the mains and the surrounds, nothing else.

Well, I've spent some time on the 708 manual. In particular p.38 describes the listening modes and appears to clearly indicate that Direct applies to multi-channel, not just 2-channel sources. If the back driver output from the DSP is plugged into the correct multi-channel surround inputs on the receiver, it should be amplified and come out the surround terminals. There is also a separate "Multich" mode, but the description indicates this is for PCM(digital)use, although it could be tried.

It should be verified that the back drivers are operating by connecting the front speaker wire to them. Also, the back driver speaker wire should be connected to the front drivers to confirm that there's no sound.

My idea was to use a receiver with multi-channel analog inputs, was to take a dedicated playback device (like a CD player), and run it into the DSP's inputs, then take the DSP outputs, and run front channels into the L&R mains, and the rear into the L&R surrounds, and then power the speakers with the outputs on the receiver.

Right, Chris; that's exactly what's being suggested here. Unless there's some failure of communication, Charles is reporting that the multi-channel analog main speaker inputs are receiving the DSP output and powering the front drivers , but the back drivers are silent.