Parasound HALO C-2, Руководство пользователя, Страница: 35 / 68

THX Audio Setup
THX features are called “post-processing” because they
are enhancements, not replacements, for Dolby Digital
and DTS. THX provides further realism with most sources
(see the chart on page 14). With THX post-processing
switched on, THX Surround EX is selected automatically if
a Dolby Digital soundtrack includes the digital “flag” that
identifies it as carrying this information for surround back
speakers and you selected Back speakers in “Speaker
Setup/Size” on page 26.
Bass Limiter Setup
Bass limiter setup allows you to cap subwoofer output levels. Bass in today’s film soundtracks
is often louder than it is on music recordings or older films, and it can cause distortion or even
damage to small or older subwoofers.
Halo C 2 owners are apt to have large, high-output subwoofers that don’t require this protection,
therefore the factory default is “Off.” The Bass limiter is not needed with subwoofers meeting
THX Ultra2 standards, so it is not available if you select “Yes” next to “THX Ultra2 Sub” further
down in the “THX Audio setup” menu.
If you ever hear distorted bass from your subwoofer, you can turn the Bass limiter on and set its
level to match the sub’s capabilities. To set the bass limiter, first press the MENU button on the
C 2 front panel or the thumpad on the Master remote to move the cursor to “Limiter noise,”
then rock the thumpad or turn the front-panel knob one click to switch the noise on. This will
feed a low-frequency noise signal to your subwoofer.
Next, move to “Limiter level” and rock the thumpad sideways or turn the front-panel knob
to raise the noise level until you just start to hear distortion from your subwoofer. Using the
thumbpad or front-panel controls, turn the noise off and the bass limiter on.
Boundary gain comp . (compensation) tames the exces-
sive, boomy bass that can occur when listeners are near
the back wall of home theaters whose subwoofers meet
THX Ultra2 standards or have flat anechoic response
down to 20 Hz. If you have such a subwoofer, setting
THX Ultra2 Sub to “Yes” gives you the option of turning
this feature on or off (try listening to it both ways, to see
which gives you more lifelike bass). If your subwoofer
does not meet these standards, setting
THX Ultra2 Sub
to “No” will disable boundary gain compensation.
ASA (Advanced Speaker Array) processes the sound sent to the surround back (not the sur-
round side) speakers. THX recommends that the two back speakers be placed close together,
facing the front of the room, to broaden the “sweet spot” in the room where their effect is
most beneficial, and provides processing to compensate if they must be spaced apart. Set ASA
to “Together” if the speakers are within 12 inches (30 cm) of each other, to “Close” if they are
separated by 12" to 48" (1.2 m), and to “Apart” if the separation is more than 48".
Bass limiter setup
Bass limiter Off
Limiter level —11dB
Limiter noise Off
Exit
THX Audio setup
Bass Limiter Setup
Boundary gain comp.
THX Ultra2 Sub Yes
Boundary gain comp. Off
ASA
Back speakers Close
Exit
ADJUSTMENTS, MENUS, AND SETUP continued
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