AVS Forum Addicted Member
Join Date: Jan 2001
Location: upstate NY
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"Small" with a crossover frequency of 80Hz is the standard recommendation for the most accurate bass.
"Small" means "enable bass management" and diverts the low frequencies (the ones below the crossover frequency) from the "Small" speakers to the subwoofer(s) and the "LFE+MAINS" setting is irrelevant and ignored.
In contrast, if you leave the front speakers set to "Large" with "LFE+MAINS" enabled, the low frequencies (the ones below the crossover frequency) are not diverted away from the main (front) speakers, Instead, they're copied to the subwoofer(s). In other words, those low frequencies are emitted by both the main (front) speakers and the subwoofer at the same time, which results in "bloated bass." Some low frequencies will be accentuated and some cancelled. Which frequencies are affected in which way depends on the dimensions of your room, the frequency, the subwoofer and speaker locations and where in the room you're listening to them..
Marantz SR7009 avr + MM9000 amp --> Atmos 7.1.4
Fronts=NHT 2.9+AC2, FH+TM=DefTech PM1000, LCR+TM amped