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In Reply to: RE: Tympani 1-D Placement posted by computerman on July 04, 2015 at 10:52:22
The interesting thing to try is 1/4 wave placement with the bass panels along the sidewalls 1/4 of the way into the room from each side and 1/2 the room between them. That should cancel out the room resonance for those parallel walls and give you cleaner bass to start without a giant resonance peak. Then you can play with the position of the MGIIIa - a good starting point is probably at the null of the bass panels about 6 ft into the room tweeters in perpendicular to the bass panels. try moving them sideways towards and away from the sidewalls. Then play with toe in
You can also use the Tympani bass panels as the sidewalls for a Limage type placement of the MGIIIa. as the long waves from the bass panel output should diffract around the IIIa - you just need to work out the delays according to position.
Another interesting idea is to try a rooze type placement bouncing the mid and tweeter output off the sidewalls when the speaker's nulls are facing you and your are looking at them from the narrowest view at the listening seat.
Follow Ups:
I am looking to setup my 1D's in a 15 by 15 room. Any suggestions as to placement? I don't understand what the 1/4 wavelength or that stuff means... I use to just move them around till they sounded right..... The room is square but the ceiling goes from 8ft behind them to 12ft behind the listening area. It's all hard surface, hardwood floors so I expect to have to do some "conditioning" of the room.
May He Who Watches Over Us All, Watch Over You And Yours.
Edits: 07/08/15 07/08/15
The way to setup a Tympani speaker in a square room is in an equidistant arc where all the panels are aimed at the listening seat. The tweeter panel is inside and the bass panel is 1-2ft or so away from the sidewalls. The tweeter should be 4ft or more from the front wall. Seating should be 3-4 ft from the back wall - could require a longer distance if the back wall is very reflective. Less so if it is very diffusive or absorptive.
I would not try a Limage type setup with the T I-D since the bass panels cover well into the midrange so would have very fuzzy imaging in that setup as they will never time align with the tweeter.
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Thanks for the info/help.
May He Who Watches Over Us All, Watch Over You And Yours.
I recently placed mine the distance of the stand away from the back wall. That did lower the amount of bass some and seemed to tighten things up as well. I am only using the two bass panels however with some modified IIIa's, so I am not sure that is appropriate for you. So far this seems to work well for me as I have a limited space to move things in but my room is close to the same dimensions you have.. mine is 14.6' or so by about 14' just about square. They do suffer from imaging issues but there is a lot that I am going to be implementing to correct this...time alignment for one. I think with the combination I will have which is a modified DCX2496 and some room correction, that I will improve, if not perfect the imaging issue.
"More will be revealed" :)
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