Boston Acoustics XB2 User Manual page 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.
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.
XB2
Powered Subwoofer Featuring BassTrac ®
crossover (Hz crossover (Hz)
100
75 75
CAUTION: Disconnect supply cord before replacing
fuse. For continued protection against risk of fire, fuse. For continued protection against risk of fir
r eplace only with same type fuse. r
A A TTENTION: TTENTION: TTENTION: TTENTION: Debrancher Debrancher avant avant de de r r r r r remplacer emplacer emplacer le fusible. le
Utiliser un fusible de Utiliser un fusible de r Utiliser un fusible de r rechange de même type. r r rechange de même type. echange de même type.
C US
6
power power volume volume line level in line level in
125 125 125 125
polarity polarity
0º 0º
bypass bypass 0 0 10 10
180º 180º
speaker level in speaker level in
left left right right
~ ~
T 0.75A L 250V T 0.75A L 250V T 0.75A L 250V V V
~ ~
120V 120V 60Hz 0.75A 60Hz 0.75A
on on
off off
power power
CAUTION CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
AVIS: RISQUE DE CHOC ELECTRIQUE-NE PAS OUVRIR