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Old 03-28-08, 07:12 AM   #40 (Link)
 
glaufman
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Alias: Greg
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Since: Nov 2007
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Re: Adding sub to "full range"...


Quote:
hddummy wrote: View Post
That does seem somewhat counter intuitive, but I think what happens is that both the sub and mains get material below the crossover and LFE. In other words, the mains get full spectrum and LFE. The sub gets low frequency material from the mains and LFE. You'd better have some serious capability on the mains to handle that.
I think that depends on how the receiver is designed, and how you've set it up...
Theoretically, the receiver is under no obligation to send LFE to the sub... if you tell the receiver your mains are "large," that implies full range, in which case it can very well send the entire LFE to the mains and nothing to the sub... (according to Dolby) ... if all the sats are set to small with a crossover, then the rcvr should transistion via opposing rolloffs from sats to sub at that rolloff... not that the mains shouldn't get anything below that freq, they have to in order to make the transition smooth, but the signal they're given should rolloff... another question becomes at what slop do they rolloff? 1st order, 2nd order, etc... (6 db, 12 db per octave, 20, 40 db per decade?) I plan to run some tests on my AVR to see what it actually does... I'll post the results if anyone's interested, but due to other projects it may be a while before I get around to it...


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