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My speakers are placed 20 feet apart with a 61 inch big screen in the middle. Seating is 15 feet away from the front of the screen. Should the main speakers be placed several inches in front of the big screen to avoid imaging problems when listening in 2-channel? I live in a loft...my room is 70 ft long by 22 ft wide and my ceilings are 25 ft high. I wanted to get a projector and roll-up screen but trying to configure it with my room dimensions became way too costly, so I went with the big screen and said to hell with it. I'm happy with the home theater setup and I haven't done any serious listening to 2-channel since I got the big screen. Well, the novelty of surround sound and a big screen is wearing off and I'm looking for a little advice on how to get the two to coexist and get the best out of my 2-channel components.My 2-channel stuff:
Preamp..............Audio Research LS-10 solid state (no phono input)
Phono Preamp........Carver C-19 Tube preamp (I have it connected to the AR LS-10 and use it for a phono preamp)
Speakers............Infinity Kappa 9 (bi-amped)
Amps.................(pair)Carver Silver 9-t monoblocks (low pass)
Amps.................(pair)Carver Silver 9-t monoblocks (high pass)
Phonograph..........Oracle Delphi Mk-I
Cartridge...........Grado Reference Platinum
CD Player...........Carver SDA/360 5 disc changer
Tuner...............Sansui TU-X1My home theater stuff:
Surround Processor...Sunfire Theatre Grand II
Rear speakers........Infinity Kappa 7.1
Center speaker.......Infinity Kappa Video Series II
Rear amplifier.......Carver TFM 45
Center amplifier.....Carver TFM 45
Television...........Phillips 61 inch
DVD player...........Samsung M-301Note:..... I have the Sunfire processor routed thru the AR preamp
Follow Ups:
This is how I have mine setup, in your system I think the speakers are too far apart for stereo, and too close to side walls, I did place my TV further back too...
Antonio Melo Ribeiro
The speakers are each at least 20 feet from the side walls. What software did you use for your illustration? I would love to have it for future use.
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I assumed they where on the short wall...I used Paint Shop Pro, did it all by hand...
Antonio Melo Ribeiro
Hi, Mitch:Here is a room mode analysis of your listening room:
Height----------Width-------Length
25.0------------22.0--------70.00
22.6------------25.7--------8.07 baseline frequency
-------------- -------------- 16.14
22.6 -------------- --------------
-------------- 25.7--------24.21 double width-length mode
-------------- -------------- 32.29
-------------- -------------- 40.36
45.2 -------------- --------
------------ ----------- -------48.43
-------------- 51.4 --------------
------------ ----------- -------56.5
------------ ----------- -------64.6
67.8 -------------- --------------
------------ ----------- -------72.7
-------------- 77.0 --------------
------------ ----------- -------80.8
------------ ----------- -------88.9
90.4 -------------- --------------
------------ ----------- -------96.43
-------------- 102.7 --------------
------------ ----------- -------104.5
113.0------- ----------- -------112.6-------------- 128.4 --------------
Apart from the 25.7 - 24.2 Hz and 112.6 - 113 mode proximities, your room has a nice spread of bass modes. If you would like to activate a bass mode, place the speakers on an even fraction of the dimension associated with the mode. If you would like to minimize a bass mode, place the speakers on an odd fraction of the dimension associated with the mode (on a null). These are just starting points for tuning the overall room bass response, changes of fractions of an inch can produce dramatic differences, so patient trial and error is required. Seating position can also affect perceived bass response in a similar way, i.e. even fraction - odd fraction seating position with respect to the width and length.
Early reflection notch filter effects from the screeen will produce frequency anomalies by doubling some frequencies, and halving others in close proximity, also call a "comb filter" effect, due to the shape of the frequency response. This will impair spatialization and upper harmonic structure, in addition to producing an unnatural and cold tonality. A thick blanket or quilt will minimize these early relfections at frequencies determined by the coefficients of frequency absorption of the material used.
Hope this helps.
Is there anyway that you can pull the speakers forward. Anything from a foot to a few feet would lessen the reflections off of the big screen tv. The effect would be like having your speakers 2 or 3ft in front of your front wall that that happens to have a big piece of furniture in the middle. Then you might try covering the actual screen of your with something (towel, sonex etc.)to damp the those reflections.
I bought a set of Pioneer ST-300 floor standing Speakers in 1989 from the far east. I need information on how to obtain a repalcement tweeter for these speakers.
I bought a set of Pioneer ST-300 floor standing Speakers in 1989 from the far east. I need information on how to obtain a repalcement tweeter for these speakers.
I used to live in a loft, though with 40 foot ceilings! I think you're biggest problem is going to be a boomy bass. You're never going to get enough furniture in the room to tame echoes etc. I would invest in acoustic treatment from Echo buster or AC (I have echo buster panels I like them a lot) and then definitely pull the front two speakers out from next to the television. Honestly you will never get great stereo sound with the setup as is. If you had a plasma maybe you can get it out of the way but even then the reflections in the middle of your soundstage are going to be off. I spoke to a guy at ASC who suggested placing panels on the side of the television set so that some damping is occurring. HE went on to suggest that I encase my television in a frame of acoustic treatment panels. I suppose I could have done that but I think it may look odd. Try to picture two large tubular columns at either side of your television. I decided to separate my two systems, one in the bedroom and one in the living room. CARA is good, and I do use it but I can tell you what the program will say. Not enough furniture add rugs etc, none of it is going to change the basic problem though. Hope that helps!
-Vik
You might consider speaker placement software like CARA to get your answer.
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