Enlightened Audio Designs TheaterMaster, Owner'S Manual

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As a consequence, 5.1-channel home theater systems—which often use different speaker
models for front, center and rear speakers, and which frequently employ different models
of power amplifiers—
are almost always out of phase!
AutoPhase automatically detects, and displays the phase of each loudspeaker, with partic-
ualr emphasis on the mid frequency range, where the ear is most sensitive. This allows
the user to reverse one or more of his or her soeaker wires, if necessary, to achieve correct
phase.
EAD’s TheaterMaster is the only home theater product that offers the customer
the certainty of a correctly phased system. Note that AutoSetup can only be used if all
five speakers, LF, CTR, RF, LS, RS are present in your system.
To use AutoSetup :
1. Plug the TheaterMaster calibration microphone into the rear-panel MIC jack.
2. Hold the microphone in the center listening position, facing upward.
3. Press the
Auto-Setup
button on page 1 of the remote control’s
Setup-1
device.
4. Keep quiet! Background noise and conversation should be kept to a minimum during
the
AutoSetup
procedure.
The TheaterMaster will now use
AutoLevel
to adjust speaker levels automatically, using a
series of pink noise bursts. During this calibration process, the Speaker Adjustment
Screen (see figure, page 16) will be displayed. Once the speaker volumes are balanced,
AutoDelay
and
AutoPhase
use a series of “pops” to measure the distances between each
speaker and the center listening position, and whether the speaker drivers move forward
(+ absolute phase) or backward (- absolute phase) when driven with a positive-going
impulse. During this latter procedure, the Speaker Distance Screen (see figure, page 16)
will be displayed. If all the speakers are in + absolute phase, the “m” symbols shown in the
figure will be replaced by “+”. Speakers with incorrect phase will be shown as “-”. If one
or more phases are incorrect, the speaker wires for thise speakers should be reversed at
the speaker terminals
or at the power amplifier— but not both!
If you have to reverse any of the speaker leads, re-run AutoSetup to ensure correct speak-
er distances, and to double-check that the speaker phases are now correct.
This is all it takes to enjoy the benefits of correct speaker phase, not to mention totally automatic
setup of speaker level and delay!
TheaterMaster will beep twice to indicate that the AutoSetup procedure has been suc-
cessfully completed. If a warble tone is heard instead of the double beep, this indicates
that the
AutoSetup
procedure has failed. (This could happen, for example, if the micro-
phone is not stationary, if there is excessive background noise, or if one of the power
24
Brief Instructions for Using AutoSetup TM
Plug in themicrophone at the rear of the TheaterMaster, press POWER

on the remote’s Theater-
Master device to bring it out of standby (the AC power switch must have already been turned on), and
press the remote control button labeled
Auto-Setup (page 1 of the Setup 1 device on the remote). Hold
the microphone at the listening sweet spot, facing upwards. When AutoSetup has finished, inspect the
TheaterMaster’s front panel display, which will show speaker distances in meters, and “+” and/or “-”
signs. All speakers showing a “-” need to have their polarity reversed. Do this either at the speaker or the
amplifier—
but not both!