Originally Posted by Alan P
1) No harm at all as long as you are staying under 0dB on the sub trim. Going over 0dB you can risk clipping the sub's amp.
Understood. I will rerun it with the sub at like 85 dB or whatever seems to make sense after I read the FAQ tomorrow.
2) There is absolutely no way you could match what XT32 does with any (affordable) outboard sub EQ. XT32 has literally hundreds of filters in the sub region alone, no way to match that with a BFD, MiniDSP, etc.
Hundreds? Wow that is impressive. I was wondering actually if there was a way to see a list of all filters it has applied to the various regions. I suppose not? I'd also be curious what it has EQ'ed in the ranges for the mid range and tweeters. I assume that it will take care of correcting for a little loss from using an acoustically transparent screen too?
3a) If you plan on having all 4 subs equidistant to the MLP, then XT32 will do a fine job EQ'ing them all as one. If you, like most of us, need to have differing distances between the subs and the MLP, you will need some way to time-align them. If each sub in each pair is equidistant (i.e. 2 in front corners, 2 in back corners), you can just use the built in SubEQ HT (calibrating each pair as a single sub). If you're setup will be more complicated than that, you will need a MiniDSP or similar. Does the BFD have the ability to set delays for 4 separate channels??
Perfect. I will have 4 of the HST-18's so it probably helps also that they are all 4 the same exact sub. It will be powered with a Speaker Power SP2-12000-DP that should ship later this week. My subs each have dual 2ohm voice coils creating a 4 ohm load each. They will then be wired in parallel to the Speaker Power amp, creating a 2 ohm load. That will deliver 3000 watts to each of the 4 subs according to the manufacturer. I assume that connecting these with a Y and using both sub outputs wouldn't change any of that?
Yes my distances play very well into using the 2 subwoofer outputs. My front two subs are in the baffle wall. They are just about equidistant to the MLP - one is about 4" further. I assume that makes not material difference. Then the other two 18" subs are located - are you ready for this? Inside the rear wall.
. Its a double studded wall and the isolation shell was extended into two cavities designed to be isolated and hold the HST 18 cabinets. This oughta be interesting.
Those two rear subs are also equidistant to the MLP. I assume I should level or gain the front two to each other and the rear two to each other - I will check the FAQ to see if that is covered.
As for alternatives, I had been considering a QSC Core 110f with a professional calibrator coming in. I'm sure he would do an amazing job. The downside to this besides the cost of the QSC and calibration is that I want the ability to tweak and understand what was done - with the pro calibrating it I wouldn't have his equipment and I would essentially be stuck with his calibration without the ability to tweak (unless done so by ear). On the plus side, I would have preset calibrations for when I'm the only one in the room at the MLP, a preset when its just a few of us in the front row, and a preset when the second row is full too. With Audyseey its just one calibration and that's it. Bummer. Some may say to just calibrate for all seats and leave it, but 90+% of the time I'll be the only one in the room and I'm quite sure a calibration for the MLP only will result in something better than a full seat calibration, as measured at the MLP.
The other alternative is to use the MiniDSP 88A with Dirac. Its been several months since I've followed the various threads, but it seemed the overall consensus as I read it favored Dirac Live. Plus with the 88A I would have the ability to use multiple presets for the various room seating configurations.
All that said, after my limited experience with XT32 in my temporary living room set up while theater is being finish, I'm rethinking the need for QSC and professional calibration. Or at least I may hold off and see what Audyseey can do in my room first, then go to another solution if I'm not totally satisfied.
Now, go play some blu rays and let us know what you think.
Wait - we are supposed to play movies and listen to music with this - not just for test signals? What's the fun in that?
As I may have mentioned in this thread, I'm building a 9.4.6 Atmos room with professional designed acoustical plan and treatments. Should be done around the end of the month. In the meantime I have a 2.1 setup in my living room just so I can enjoy some music in my new speakers. It sounds incredible at the moment, with Audyseey off/on being the difference of good-sounding vs amazing sounding.
Thanks again to you and everyone for all the wonderful help and support!