Now let me tell you something about my home theater. My speakers (musical instruments) feature Scanspeak's slit-cone midrange Revlator drivers and matched silk dome tweeters (their best and most expensive drivers). The upper bass woofers are Daton Titanic III 10-inch drivers and the sub woofers are Daton Titanic III 15-inch woofers. The fs is 19 Hz and in their enclosure go down to 16 Hz at 125 dbs measured at one-meter (they rock the house when they achieve room lock). These speakers are 4-way tower floor standers. The cabinets are 2-inch MDF, braced, properly dampened, and stuffed with a proprietary filler. The weight is in excess of 375 lbs each!
The center channel speaker uses the same tweeter and midrange driver as the left right towers. The center channel bass is channeled to the left-right tower woofers via the pre-pro (small speaker setting). The center channel also have two Revelator slit cone mid range drivers and the speaker is laid sideways on its own dedicated stand which places it dead center to the bottom of the movie screen. Cross over and phasing are set to eliminate lobing. The rear surround drivers use linium ribbons and 5-inch hexacone drivers with passive 24 db/Oct cross overs which are housed in a a nonresonate aluminum enclosures. These quasi omnidirectional speakers are ideal for surround speakers. They are mounted 7 feet from the floor on the sides and rear of the theater seating area. They are set on the small speaker setting in the prepro, thus utilize the left and right front main speakers woofers for bass below 80 Hz. They, along with the center channel speaker are crossed over at THX's recommended 80 Hz point.
The sub woofer consist of a custom built 450 pound enclosure, tune ported per computer analysis which sports two 18-inch drivers. It works down to 12 cycles (- 3 db point which is the limit to our measurement equipment). Its efficiency is 95 db at 1 meter, 1 watt in put. The drivers are made by Focal (Jm Labs) in France. All speakers are padded to a 90 db output at one meter. All speakers are electronically crossed over and triampliefied with Anthem amplifiers @ 200 watts per speaker (each speaker has its own dedicated amplifier)!
My home theater pre-pro is a RDC-7 Integra Research (latest model with all upgrades). My DVD-CD player is Sony's flagship NS999ES DVD/CD/SACD player. Inter connects are Monster M-1000's wires. Speaker cables are good old fashioned 14 gauge Belden, oxygen free copper wire for the tweeters and midrange drivers and 12 gauge for the woofers and subwoofers (more about that later). My video consist of an 84-inch Stewart Grayhawk electric retractable screen. The overhead-front projector is a Sony Hi-Def LCD Cineza (the only dront projector I have ever viewed that projects a picture which looks good when an end table lamp is turned on in the room).
I use Monster's line conditioner powered by a TripLite power converter transformer set up. All AC lines are dedicated 20 amp and grounded with a 3-foot copper stake in the ground. TV reception is DSS satellite. All Inter connects are 2 meters or less in length. Speaker wires are 18-ft. or less. My room is 12-feet high, 18.5 feet wide X 23.5 feet long and semi open to a hall, foyer and dining area (which make wonderful bass traps). This, mathmatically, causes a 34 Hz, 45 Hz and 72 Hz 5 db suckout, a mild 3 db suckout at 52 Hz and a huge 12db boost at 62 Hz and a 4 db boost at 80 Hz. This is corrected with an Audio control 1/6 octave bass equilizer (set with calibrated mic and meter), plus judicious phase adjustment to the sub woofers. The bass frequency measurement while in the main seating area of the room (14-feet from the center of the screen) is + 2db, - 1.5 db from 120 Hz to 18 Hz.
The entire system from 20 Hz to 11K Hz. (the limit to my hearing) is + or - 2.5 db @ 4.5 meters from the center speaker, while seated as measured on an HP real time spectrum analyzer. Acoustical treatment consists of hung decorator rugs on the back walls, large back wall book case stuffed with books and nic-nacks, an acoustical fluffed (popcorn) ceiling, a 9 X 12-ft. area rug, and very soft, absorbant, dual pleat blinds which may be dropped down on the side walls exactly where the first sound wave launch hits the wall. Speakers are properly placed by comuter and sound meter analysis.
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