Operation - Infinity Modulus MSW-1 Service Manual

MSW-1
Surround Modes
When using the Modulus system in a Dolby* Pro Logic* home
theater system, make sure the receiver's center-channel mode is
set to "Normal". When using the Modulus system in a Dolby Digital
or DTS home-theater system, make sure the receiver's speaker
modes 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.
Power On
Plug your Modulus subwoofer's AC cord into a wall outlet. Do not
use the outlets on the back of your receiver.
Initially set the subwoofer's Gain Control (8) to the "O" position.
Turn on your sub by flipping the Power Switch (7) on the rear panel
to the ON position.
Turn on your entire audio system and start a CD or movie sound-
track at a moderate level.
Adjust Gain
Turn your subwoofer's Gain Control (8) up to the "5" position (half
way). If no sound 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 connected to a "live" receptacle?
Has the Power Button (7) been pressed to the "ON" position? (Note:
The Gain Control (8) on the front panel will turn green when the
power is on.) Once you have confirmed that the subwoofer is active,
proceed by playing a sound source. Use a selection that has ample
bass information.
Set the overall volume control of the preamplifier or stereo to a
comfortable level. Adjust the subwoofer's Gain Control (8) until you
obtain a pleasing 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 bass. This is not entirely true.
A subwoofer is there to enhance bass, extending 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 is
never obtrusive.

OPERATION

Phase Control
The Phase Switch (4) 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.
NOTICE
The operation of the Modulus MSW-1 Home Theater System
regarding the proper settings for the Room Adaptive Bass
Optimization System, or R.A.B.O.S., is thoroughly covered in the
Owner's guide, part# 336782-001.
For service purposes, the R.A.B.O.S. system is canceled when front
panel switch "Bass Optimization System" is switched OFF.
The only other control of concern is the Main Level Control on the
front panel, which operates like a traditional potentiometer.
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