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I know how bass management works (e.g. if you set a speaker to small the sub-80Hz bass goes to the sub (if present), etc., etc.). My question is this: If you have fronts set to "large" and sub set to "on" and you're playing a plain stereo CD in stereo mode, how does the bass get split up? Do the mains get everything and the sub reinforces the sub-80Hz region? It would seem like that would result in too much bass. Does the sub-80Hz bass get split half and half between the mains and the sub? This would seem more logical, but I'm not sure. Anyway, I was just wondering this, as there doesn't seem to be much clear explanation about it.Thanks,
RichardH
Short answer: all processors are different. In most cases if the sub is on it will receive a signal; typically from 80-100 hz depending on the processor's xover point. Many will also let you run the mains full range AND a sub. Is the sub getting a signal from the preamp in this setting? Most processors, yes. What freq is the sub playing at? Depends on where you have the sub's internal xover set. My system is setup thusly: the mains can play down to about 60 hz, and I think the system sounds better with the sub playing only the really low bass so I have the mains set to "large" to feed them a full range signal. My sub is also enabled and is output a lowpass signal from the processor at 80 hz, but I have the sub's xover set lower; at about 65 hz so that it kicks in where the mains roll off. In my system this sounds much better than setting the mains to "small" and rolling everything below the processor's xover point into the sub.I have seen some processors that if a sub is selected you are not allowed to run the mains full range at all. To prove once and for all what your processor does; assuming you can't get it from the instructions, use a test disc. Set your mains to "large" and play a tone at the processor's sub xover point. Now you can check to see if you get output from the mains and the sub, or just the sub.
I have a Harmon Kardon avr-300. The small setting cuts off low frequency to the mains or center or surrounds at 100 hz. The three are individually selectable. When all are set to large there is no output to the sub. I can play around with the various speakers to see what sounds best. I have my mains set to small, my center to small, and my rears set to small. I use a 15" audiosource sub from 20 to 40 hz and then crossover to two 8" audiosource subs with the high end set to 110 hz. One of the 8" subs is in the front and one in the rear of the room. It is unbelievable in HT and it is excellent with the Eagles DTS DVD Hell Freezes Over (my best source so far).
The way that bass management is supposed to work is this:I'm making one assumption here, that you only have the LFE signal
out to the subwoofer.A speaker set to Large should receive a full range signal -- with NO
bass going to the subwoofer.Think about the configuration -- it should be obvious.
On my Yammie, I can set LFE to sub or mains or both.
My system is dd/dts surround with Paradigm active sub however, if I select plain jane stereo 2ch mode my sub is then elimiated however, I can set it up with sub on however, if I choose a different settingI believe with the sub on in stereo mode the mains get everything and the active sub kicks out anything below the cut off frequency
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