Originally Posted by Curt_Trinnov
From your post, you have potentially 4 subs. 2 LFE ins on the DefTech Mythos ST mains, and 2 HSU subs. You can use the single SUB out of the R972 to drive all 4. Splitters are OK. (Watch out for added hum caused by possible ground loops between the power cords and the Y audio signal.) The key is you only have the one SUB out, so levels, distances have to be factored in before you hook up. It's possible you may improve performances by using all 4 to warrant the exercise. Depends on several factors- speakers, room, placement, measurement data...
I suggest: First, define the benefit, which you don't describe. Is the goal individual listening or group listening area, etc? Second, learn how the two speaker types perform/differ, so they may be configured in a complementary way. (great, your already considering this) Third, learn about the room by collecting data (you identify measuring tools). Lastly come up with alternative game plans to try. This will be where you add up the data- on the speakers and room, then decide your approach. For this process, there is a lot of information available on configurations and measuring to improve room mode interaction. Go this route (build on what you know/understand), and possibly get some professional guidance. However far you go in the process, Trinnov will improve it further.
By and by, you are on the right track and paying attention to the right details.
I knew I forgot something.....the goal would be individual listening. While our listening would be done from our sofa (MLP), I'd be doing serious listening about 70% of the time on my own from the center of the MLP, so I'd optimize for individual listening as I'm the only one that's going to care all that much. Although once my wife hears Trinnov that may change...
: (the R-972 cooperating with the Harmony doing the RC duties).
My own listening is about 60/40 music over movies, with a heavily multichannel music leaning toward concert BluRays and DVDs. However, I plan to do separate calibrations for multichannel vs. two-channel, and ultimately use the virtual inputs on the Sherwood for HT Cinema, HT Music, TV, and two-channel. Right now, my sole input into the R-972 will be an Oppo 103, which is a universal player for BluRay, DVD, SACD etc.. I'm using it as my "hub" for evaluating Trinnov, and the HDMI input on the Oppo will handle video from my TiVO via HDMI as well as decoding audio. Hence there will only really be one physical source for the R-972 to worry about. And the Oppo's doing decoding to LPCM, so about the only thing I'm using the Sherwood for music processingwise is converting two-channel music to Dolby PLII or DTS Neo:X, possibly. Basically I'm thinking of it as a 40 lb. processor between the Oppo and the Denon 4311 I'm using as an amp via Ext. In.
As to getting all the sub sources to play together, that's going to mean level-matching or possibly even gain matching them if I go for the mono bass/single input route. And I'll have to pick up an external device for setting distance, since they're in two different locations (front and back). Anybody on the list got thoughts about that one?
The easy thing to do is keep the powered woofer and non-powered section operate as a single speaker, run them Small, and let the Sherwood do its job with my two equidistant real subs operating as one. But it struck me that I could get creative....so basically I've got at least two alternative approaches, maybe three, to try.
FWIW, Curt, I have REW/HDMI, and am part of the group that's obsessively looking at how to use it for accessing our rooms...
When I actually get into running Trinnov calibrations in the next few weeks, I'm going to get some FR, waterfall, spectrogram, and impulse response charts together. It will be very interesting to see what Trinnov can do for me there. I'll have to work out a protocol for just how to access remapping (probably 2D), if at all.
As to the two "sub channels", I figured it probably wouldn't be feasible, but it was worth throwing out to see.
I may look into the professional guidance aspect...
, or try some creative things down the road with non-standard speakers (maybe a "center height"?) as you outlined in your notes too.