Sony STR-DA2000ES Operating Instructions (primary manual) Operating Instructions Manual page 31

(Surround Back (the surround back
components obtained by 6.1 channel
decoding))
Example:
Recording format (Front/Surround): 3/2
Output channel: Surround speakers absent
Sound Field: A.F.D. AUTO
SW L C R
SL SR
R L.F.E.: Lights up when the disc being played
back contains the LFE (Low Frequency
Effect) channel. When the sound of the LFE
channel signal is actually being reproduced,
the bars underneath the letters lights up to
indicate the level. Since the LFE signal is not
recorded in all parts of the input signal the bar
indication will fluctuate (and may turn off)
during playback.
GB
31