Originally Posted by djbluemax1
This, by definition is bass management (or low frequency steering).
If you set the main speakers to Large, you are in effect, telling the bass management, "My main speakers can play all the frequencies, even the very lowest, so please send it all to them". In this configuration, the ONLY thing that would get sent to the subwoofers is the .1 LFE (Low Frequency Effect) track in multichannel audio (i.e. NOT CD's). Basically the only thing on the LFE channels are low frequencies from explosions and rumbles, so your subwoofers are hardly doing anything unless there are a lot of explosions or other low frequency effects (and some film mixers occasionally encode a lot of low frequency effects in the main L&R channels themselves instead of the separate .1 LFE subwoofer channel).
If you set the speakers to Large, as mentioned, there is no steering of bass to the subwoofers and they receive nothing unless it is encoded in the .1 channel of a 5.1 audio track. Everything encoded in the L&R will be sent to the L&R only. BUT, if you followed the directions you quoted and set the Subs setting to 'NO' in the receiver, then your receiver is under the impression that you have no subs and obviously won't output ANYTHING to your subs, and any lower frequency signals in satellite channels with a crossover (the center channel with a 120Hz crossover for instance) will be sent to the L&R and not the subs.
If you have some decent subs, I would suggest using a crossover of about 40Hz for the Tritons as they don't really go flat below that. If you have an avr with Audyssey (or other room correction), the calibration procedure will measure the F3 point of the speakers in your room (where the output of the speakers drops by 3db at the lower frequencies, which generally defines the usable end of the speaker's low frequency range) and set appropriate crossovers for you.
If you don't do it this way, you will potentially end up with a dip in the low frequency response unless you happen to coincidentally have modal reinforcement in the specific deficient frequencies in the lower octaves. A capable sub will do better below 40Hz than the Tritons will when properly setup.
I tried setting up the Tritons without a subwoofer and they simply don't dig deep enough to get the best audio for movies. For music playback ONLY, you should be OK as long as you don't listen to anything with pipe organs in it.
For instance, in the 'Entering The Grid' scene from Tron:Legacy, the Tritons are incapable of fully reproducing the low frequencies in that scene without a good sub to hand off the lowest frequencies to (below 40Hz). The problem is, even turning up the sub volume knob in the back doesn't help because the speaker's frequency response doesn't go anywhere near as low as the frequencies do in the scene in this example, so you'll boost the bass in the higher frequencies (above 40Hz), but won't be getting much below it. In addition, I wouldn't try playing that scene at THX Reference 0db unless the system is calibrated for a listening distance of 3 feet. The subs in the Tritons aren't made to handle it.
I also found that turning the sub volume knob in the back to near the 12 o'clock position was NOT a solution as the sub's internal crossover is at 250Hz, which affects the lower frequencies of male vocals. Anywhere near 12 o'clock made Gerard Butler's voice in 'Phantom Of The Opera' sound boomy and it was pretty difficult to try to bring the frequency response back to flat as turning the knob to 12 o'clock increased the frequency range from ~40Hz to 250Hz.
To achieve a +/- 3db response down to 40Hz required starting out with the knob around the 9-10 o'clock position (in a room about 16' by 22' by 8').
So simply put, if your receiver or pre-pro doesn't have a built-in room correction system, I'd set the knob at about 9-10 o'clock, set the Triton crossovers at about 40-50Hz if you have good subwoofers (anything along the lines of Epik Empires, Hsu 15's, or SVS PB13 Ultras or anything that can play flat to 20Hz or lower) and let the bass management send anything below the crossover point to the separate subs.
If you're mostly just playing music on them, run the Triton's as Large if you wish, unless you're listening to pipe organs or wish for more bass from more capable subs.