Yamaha YST-SW120 - Manual (Page 4)

4
• This subwoofer system employs YAMAHA Active Servo
Technology which YAMAHA developed for reproducing
higher quality super-bass sound. (Refer to page 11 for
details on Active Servo Technology.)
This unit does not only enhance bass frequency response
of sound output in your audio system, but, by reproducing
the bass frequencies, the subwoofer permits your existing
amplifier and speakers to operate under less strenuous
conditions, improving overall system performance. • This unit can be added easily to your existing audio system
by connecting to either the speaker terminals or the line
output (pin jack) terminals of the amplifier.
• For the effective use of this unit, this unit’s super-bass
sound must be matched to the sounds of your main
speakers. Therefore, this unit employs a continuously
variable high frequency cut-off point (HIGH CUT) control.
Moreover, the PHASE switch allows you to select the best
sound quality for various listening conditions.
If using one subwoofer, it is recommended to place it on the
outside of either the right or the left main speaker. (See fig.
.) If using two subwoofers, it is recommended to place
them on the outside of each main speaker. (See fig. .) The
placement shown in fig. is also possible, however, if the
subwoofer system is placed directly facing the wall, the bass
effect may die because the sound from it and the sound
reflected by the wall may cancel. To prevent this, face the
subwoofer system obliquely to the wall as shown in fig.
or
.
One subwoofer will have a good effect on your audio system,
however, the use of two subwoofers is recommended to obtain
more presence.
Note
There may be a case that you cannot obtain enough super-
bass sounds from this unit when listening at the middle of the
room. This is because “standing waves” have developed
between two parallel walls and the bass sounds are being
canceled.
In such a case, face the unit obliquely to the wall. It also may
be necessary to break up the parallel surfaces by placing
bookshelves etc. along the walls.
B
A
C
B
A
FEATURES
PLACEMENT
A B C