Sunfire 12 User Manual

User's Manual

12

Subwoofer performance is greatly af-

fected by the room in which it is situated, 
and the positioning within the room. The 
room effects will boost and cut the output 
levels reaching your listening position. 
This gives a "Room EQ" effect which can 
often be far from wonderful. 

The SunÞ re True Sub EQ can automati-

cally adjust for the effects of Room EQ. It 
measures the actual frequency response 
using the supplied measurement micro-
phone. Then it automatically compen-
sates for peaks or dips and smooths out 
the response.

The following procedure will help you 

start the automatic equalization:

Automatic EQ Mode

1.  Install the True Sub EQ in the best loca-

tion you can Þ nd (see previous page). 

2.  The calibration must be done while the 

listening room is quiet. Please turn off 
any noisy machinery, including heating 
or cooling systems during this process. 
Have the kids play in the backyard and 
give the dog a treat to have him stop 
barking. A small amount of noise, such 
as quiet talking or whispering, is OK.

3.  Place the microphone in the listening 

position (on the couch, for example), 
pointing in the direction you’ll normally 
be facing while listening to your system. 
Only use the microphone supplied by 
SunÞ re.

Room Equalization (EQ) Procedure

4.  Plug the microphone into the subwoof-

er's microphone jack. 

5.  Set these controls:

•   Volume to 0 dB.
•   Crossover to "Bypass."
•   Phase to "Normal." 
•   Equalizer Authority to "Normal"

6.  Turn on the subwoofer AC power switch 

and press the Start button to go from 
standby to play mode. The yellow LEDs 
should light up. Press Start again, and 
hold it a moment to start the calibration. 

7.  The subwoofer will generate a test tone 

sweep, slowly increasing up the fre-
quency scale; the microphone will take 
measurements of the sound arriving at 
your listening position. The LEDs will 
ß ash randomly for a while, then the pairs 
will gradually glow constantly as each 
band is measured. This sequence will 
repeat twice until the measurements are 
complete. The LEDs will all blink once 
and stay on, and the test tones will stop.

 If 

you 

Þ nd that the Þ rst test tone plays 

louder and louder, and never leaves the 
Þ rst band, then either the microphone is 
too far away from the subwoofer, or it is 
not plugged in correctly.

8.  The procedure may take several 

minutes. Do not make any loud noise 
during this process, as it may affect the 
accuracy and/or make it take longer.