Room Tuning -
Mechanical
adjustment of
the boundary
frequency
By using the supplied bass plugs in the bass reflex gates, you can
alter the lower boundary frequency on XTZ 99 W12S.
This makes it possible to alter the sonic characteristics of the
woofer.
Since there are 4 bass reflex gates, you can have many different
settings. The picture below shows 3 basic settings.
By altering the volume, phase and frequency you can do further
adjustments on the sound.
1st mode - no bass plugs in the reflex gates
No plugs in the gates will provide a "quick" bass character
especially suitable for larger rooms where the lower frequencies
often are amplified by the room itself.
2nd mode - no plugs in the 2 large reflex gates, 2 plugs
in the small reflex gates
This will provide a neutral, even and deep bass setting.
3rd mode - plugs in all the reflex gates
All plugs in the gates will provide a "deep" bass suitable for
smaller rooms. The woofer now works like a closed gate.
Tip (if you purchased 2 active subwoofers)
To simplify the installation process, use only 1
subwoofer when testing out your ideal
settings. When you are satisfied, set the
second subwoofer in the equal setting. Finish
by altering the volume.
Room tuning will also have influence on the
efficiency you will have to adjust the volume,
frequency and High Pass in the room tuning
modes.
"Quick" bass explained:
By this we mean a bass with less deep bass
information. This might also be called "hard",
"attack", "tight", "punchig" etc.
This pictures shows not actual measured curves. It is only intended to be used as an illustration on the different acoustic
characteristics in the lower frequencies.
