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This topic comprises 7 pages: 1 2 3 4 5 6 7
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Author
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Topic: Getting New Amplifiers
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Randy Stankey
Film God

Posts: 6539
From: Erie, Pennsylvania
Registered: Jun 99
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posted 04-06-2011 02:38 PM
Update:
I received three brand new QSC DCA-1622 amplifiers yesterday. I was up until the cows came home last night installing them and tuning up the system.
Two words: KICK ASS!
I would characterize the difference in sound quality at nearly an order of magnitude better! There is almost as much difference between the DCA amps and the old ones as there was when I upgraded from the Smart cinema processor to the Dolby CP650.
I now have three amps, one for each screen channel. They operate in bridged mode, sending full range to the stage. The crossovers in the JBL cabinets handle conversion.
With the original amps, I had the output of the processor turned up to approx 75 (in the setup menu, not the master fader) but now, the output settings are in the mid 40's. Even then, I am now setting the master fader at 5.0 where it was originally at 6.0. Even at the lower fader setting, the sound is louder but because there is so much less distortion, the higher volume levels are tolerable. (And, even quite comfortable!)
This is the cool part: Literally... pun intended... Even after running for two hours, playing a movie at moderate to loud levels the amps are completely cool. If you put your hand on the back of the chassis/cover they are not even warm at all. When you place your hand over the air vent the air that comes out is actually cool.
I think the amps sound great as they are but I am going to have my boss's sound tech come in to "help" equalize the system for the room. Honestly, I don't think it's needed but I do this just to satisfy the boss. Yes, I think I can do a proper job of EQ-ing for the room but if his guy comes to bless my work he will feel better. (I hate politics!)
We're pretty much on our way! We have seen attendance improving in the last few weeks. The last two weeks, we actually had near sell-outs! This an 800 seat house! While last week's movie was "The King's Speech," I still think the improved attendance had something to do with the improvements in sound.
I'm hoping this will pave the way for me to get surround sound installed in this theater. (Fingers crossed!)
P.S.: Thanks for all your help, Sam!
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