Operation; Maintenance And Service; Phase Control - Infinity PHI 51 Owner's Manual

O
PERATION
Surround Modes (Using LFE or line level inputs
to subwoofer)
When using the PHI system in a Dolby Digital or DTS home theater system,
make sure all speakers are set to "Small".
Some Dolby Digital-equipped receivers/processors offer different setup
options for each source or surround mode, e.g., CD-stereo, videotape,
Dolby, Pro Logic. In each case, follow your equipment's instructions to
ensure that the subwoofer output is turned on and that the speakers are
set to "Small"in each mode.
Surround Modes (Using high level inputs to subwoofer)
When using the PHI in a Dolby Digital or DTS home theater system, make
sure all speakers are set to "Large" in your receiver set-up menu.
When using the PHI in a Dolby Pro Logic* home theater system make sure
the receiver's center channel mode is set to "Large".
Some Dolby Digital-equipped receivers/processors offer different setup
options for each source or surround mode, e.g., CD-stereo, videotape, Dolby,
Pro Logic. In each case, follow your equipment's instructions to ensure that
the speakers are set to "Large" in each mode.
Power On
Plug your subwoofer's AC cord into a wall outlet. Do not use the outlets on
the back of the receiver.
Initially set the Subwoofer Level Control
the subwoofer by pressing the Power Switch
Turn on your entire audio system and start a CD or movie soundtrack at a
moderate level.
Important Note: The PHI Subwoofer includes a switchable Auto-On/Auto-Off
circuit. During periods of normal use, the Main Power Switch should always
be left on. It should only be turned off during extended periods of
nonoperation, e.g., when you are away on vacation.
Also, the Power Mode switch controls the daily ON/OFF function of the
subwoofer. In position "On", (which is the normal position), the supplied
Sub Trigger cable controls the subwoofer, switching it ON when a trigger
signal is sensed by the Sub Trigger input. This means that whenever your
main system or receiver is switched OFF, the subwoofer goes to OFF as
well. "Auto" is meant for systems that do not offer the use of a trigger
signal. In Auto mode, the subwoofer "listens" for a signal, and switches
ON whenever a signal is present. If no sound is sensed for a while, the
subwoofer switches to OFF. This means that if there is almost no sound
entering the subwoofer for a while, it shuts off, only to "wake up" again
whenever a sound arrives. This causes a short delay in bass reproduction,
so the initial part of a bass signal may not be reproduced. If possible, use
the trigger cable and set the Power Mode Switch to ON.
Adjust Gain
Turn the Subwoofer Level Control
emanates from the subwoofer, check the AC-line cord and input cables.Are
the connectors on the cables making proper contact? Is the AC plug con-
nected to a "live" receptacle? Has the Power Switch
the "On"position and the Power Mode Switch been set to "On" if a Trigger
Cable is used, or "Auto" to react to incoming sound? Once you have
confirmed that the subwoofer is active, proceed by playing a CD, record or
cassette. Use a selection that has ample bass information.
Set the overall volume control of the receiver/processor to a comfortable
level. Adjust the Subwoofer Level Control
blend of bass. Bass response should not overpower the room but rather
be adjusted so there is a harmonious blend across the entire musical
range. Many users have a tendency to set the subwoofer volume too loud,
adhering to the belief that a subwoofer is there to produce lots of
to the"MIN" position. Turn on
on the rear panel.
up about half way. If no sound
been pressed to
until you obtain a pleasing
bass.This is not entirely true. A subwoofer is designed to extend the
response of the entire system so the bass can be felt as well as heard.
However, overall balance must be maintained or the music will not sound
natural. An experienced listener will set the volume of the subwoofer so
its impact on bass response is always there but never obtrusive.
Crossover Adjustment
The Crossover control determines the highest frequency at which the
subwoofer reproduces sounds. For the PHI system, it is recommended that
this control be set at 200 Hz, which is marked as ideal crossover point on
the Crossover control scale.
If you have a Dolby Digital or DTS receiver/processor with an LFE (Low
Frequency Effect) output, please note that any internal filter (low-pass
filter) in the receiver should be set to 200 Hz as well.

Phase Control

The Phase Switch determines whether the subwoofer speaker's
piston-like action moves in and out with the main speakers, 0°, or
opposite the main speakers, 180°. Proper phase adjustment depends on
several variables such as room size, subwoofer placement and listener
position. Adjust the phase switch to maximize bass output at the listening
position.
Final Positioning
After correctly connecting the PHI system and verifying that both the
subwoofer and all satellite speakers are playing, it is time to optimize the
system for your particular listening room. Earlier, you placed the subwoofer
in its general location. Finding the exact location for optimum performance
sometimes only involves moving the speakers up to a few inches in any
direction. We urge you, therefore, to experiment with placement, if possible,
until your speakers deliver their full potential.
M S
AINTENANCE AND ERVICE
The speaker and subwoofer enclosures may be cleaned using a soft cloth
to remove fingerprints or to wipe off dust. The grilles may be gently
vacuumed. Stains may be removed with an aerosol cleaner, following its
instructions. Do not use any solvents.
All wiring connections should be inspected and cleaned or remade
periodically.The frequency of maintenance depends on the metals involved
in the connections, atmospheric conditions, and other factors, but once per
year is the minimum.
If a problem occurs, make sure that all connections are properly made and
clean. If a problem exists in one loudspeaker, reverse the connection wires
to the left and right system. If the problem remains in the same speaker,
then the fault is with the loudspeaker. If the problem appears in the oppo-
site speaker, the cause is in another component or cable. In the event that
your PHI system ever needs service, contact your local Infinity dealer or
distributor.
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