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CONFIGURING THE S170
AUDIO SETUP
The <Audio setup> menu enables you to modify tone-control settings and other listening options.
Modifications you make on this menu will remain in affect until changed again, or until a Preset containing
different settings is recalled (see below). This menu also serves to calibrate the S170's Bass limiter, a
function that will generally be a one-time setup task.
BASS/TREBLE
From the <Audio setup> menu, select the <Bass> or <Treble> item using the remote's [Cursor up/down],
keys. Using the [Cursor <>] keys, you may increase or decrease Bass or Treble settings by ±12 dB by 1 dB
steps.
• Bass/treble settings affect only the front channels (left, center, and right), and are active in all listening
modes.
• It is often better to "cut" (a minus setting) than boost (a plus setting); for a "warmer" overall sound
try reducing Treble by a few dB instead of boosting Bass, and vice versa.
• If you frequently find yourself selecting large tone control settings, you may be better served by
reexamining your choice of loudspeakers, and your loudspeaker and listening-position locations to
better exploit your room's acoustics.
LFE CHANNEL
The Low-Frequency Effects channel—the "point-one" channel in "5.1/6.1/7.1"—is active only with Dolby
Digital or DTS multichannel sources. LFE is employed most often as a supplementary channel to enhance
the dynamic range of very low-frequency sounds; it should not be confused with the S170's Subwoofer
output-channel, which may carry most or all bass information from some or all channels, depending on
the configuration of the <Speaker setup> menu page.
From the <Audio setup> menu, select the <LFE channel> item using the remote's [Cursor up/down], keys.
Using the [Cursor <>] keys, you may decrease the LFE channel setting by as much as 10 dB in 1 dB
decrements.
• In most systems the LFE channel setting may be left at 0 dB (no change), because the S170's Bass
Limiter (see below) will be set to prevent subwoofer overload. However, if your subwoofer's headroom
is known to be limited, or if the low-frequency effects of film soundtracks generally seem excessive in
your system, you might profitably try decreasing the <LFE channel> setting by a modest degree.
THX DEFAULT
From the <Audio setup> menu, select the <Default THX mode> item using the remote's [Cursor up/down],
keys. Using the [Cursor <>], you may set the THX default to "EX on" or "EX off." With <Default THX
mode> set to "EX on," the S170 delivers 6.1/7.1-channel Surround EX processing whenever the THX
mode is engaged and a Dolby Surround EX program source is detected; with sources that are not Dolby
Surround EX programs , the S170 derives a center-back channel to preserve 6.1/7.1-channel reproduction.
NOTE
THX Surround EX creates a sixth, "center-back" channel intended for reproduction by one or more
loudspeakers located behind the listening area. With recordings bearing the Dolby Surround EX mark,
this delivers a specifically engineered center-back channel that is encoded into the left/right surround
channels much as the center channel was encoded into the left/right front channels in matrix-encoded
Dolby Surround mixes.
BASS LIMITER
The S170 incorporates a Bass Limiter that you can set to eliminate any chance of your subwoofer producing
audible distortion. You will do this by auditioning a built-in test-noise signal the S170 sends to your
subwoofer, and increasing the Bass Limiter's "headroom" setting to the point of audible distortion. The Bass
Limiter now prevents any program-material signals exceeding this level from being sent to the subwoofer.
