Claim: The low-frequency effects (LFE) was originally developed to carry extremely low "sub-bass" (which starts around 60 Hz and goes down to about 20 Hz, and people often feel them more than hear them) cinematic sound effects and in the layouts of the standard speaker channel, five systems do not have LFE while only two systems have LFE.
Evidence: 2.1 3.1 4.1 5.1 5.1 Yes 6.1 6.1 6.1 7.1 Yes 7.1 Yes 9.1 11.1