Boston Acoustics XB2 - Manual (Page 6)

6
Controls
Crossover (Hz): Adjusts the frequency of the lowpass filter for the subwoofer.
Power off/on: Switches the amplifier on and off. Once switched to the “on” position, the XB2’s auto-on circuitry
turns the subwoofer on when a signal is presented, and turns it off after no signal is detected for several minutes.
Polarity (0° or 180°): Selects regular (0°) or inverted (180°) polarity for the subwoofer. Set this switch to provide
the fullest, most dynamic bass. The effect of phase will be most audible on low-frequency percussion instruments
or music with a continuously repeating bass line.
Volume: Adjusts the sound level of the subwoofer. A typical setting is around 11 o’clock.
crossover (Hz crossover (Hz) volume volume power power
0º 0º
180º 180º
polarity polarity
line level in line level in
left left right right
speaker level in speaker level in
75 75
100 125 125 125
CAUTION: Disconnect supply cord before replacing
fuse. For continued protection against risk of fir fuse. For continued protection against risk of fire,
r replace only with same type fuse.
A A TTENTION: TTENTION: TTENTION: Debrancher Debrancher avant avant de de r r emplacer r r r emplacer le le fusible.
Utiliser un fusible de r Utiliser un fusible de r echange de même type. r r r echange de même type.
Powered Subwoofer Featuring BassTrac ®
120V 60Hz 0.75A 120V 60Hz 0.75A ~
on on
off off
T 0.75A L 250V T 0.75A L 250V ~ V V ~
XB2
bypass bypass 0 0 10 10
power power C US
CAUTION CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
AVIS: RISQUE DE CHOC ELECTRIQUE-NE PAS OUVRIR
Placement
Place the subwoofer next to a wall or in a corner near your front/main speakers. Typically, the sound is best when the
subwoofer is within 15 feet (5m) of the front/main speakers. However, the sharp 24dB/octave crossover roll-off per-
mits placement farther from the front/main speakers if necessary. Since the ear is unable to localize the low
frequencies of the subwoofer, the bass still appears to come from the front/main speakers. In most cases, the
subwoofer may be placed anywhere in the listening room.
The level of bass output from the subwoofer will vary at different positions in a room. When placed near walls, its loud-
ness is emphasized. Corner placement provides the most bass output, while placement near only one wall will provide
somewhat less bass. Placement completely away from walls may produce too little bass. Regardless of how you place
the subwoofer, you can adjust the subwoofer’s level with its rear panel level controls. If you move the
subwoofer, recheck the setting of the polarity switch. Use the setting that yields the louder and more dynamic sound.