4 En
■ Connecting the speakers and
subwoofer
Connect each speaker and a subwoofer to the
appropriate speaker terminals on your amplifier by
using the cables you prepared earlier. See the
“Connection diagram” on page 3 for reference.
Make sure you connect the speakers and subwoofer
with the correct polarity—positive (+) terminals to
positive (+) terminals, and negative (–) terminals to
negative (–) terminals. If you get them crossed over,
the sound will be unnatural and lack bass.
In your AV receiver’s speaker size settings, specify
small (or “S”) for all of the speakers and subwoofer.
Connecting the power cables
Once you’ve completed all of the speaker and
subwoofer connections, plug the amplifier, and your
other AV components into suitable AC wall outlets.
If this product doesn’t work as expected, look for a possible cause below. If the issue you are experiencing is not
listed, or you cannot resolve it after reading through these instructions, disconnect the power cable and contact an
authorized Yamaha dealer or service center.
■ Front, surround speakers (NS-B20) and
center speaker (NS-C20)
Type...........................................Full range acoustic suspension
non magnetic shielding type
Driver ...................................................7 cm (2-3/4") cone type
Nominal input power ....................................................... 30 W
Maximum input power .................................................. 100 W
Impedance ............................................................................. 6 Ω
Frequency response
NS-B20................................................70 Hz-25 kHz (-10 dB)
-45 kHz (-30 dB)
NS-C20................................................65 Hz-25 kHz (-10 dB)
-45 kHz (-30 dB)
Sensitivity
NS-B20.........................................................83 dB/2.83 V, 1 m
NS-C20.........................................................84 dB/2.83 V, 1 m
Dimensions (W x H x D)
NS-B20.......... 115 x 176 x 88 mm (4-1/2" x 6-7/8" x 3-1/2")
NS-C20.....................291 x 101 x 103 mm (11-1/2" x 4" x 4")
Wei ght
NS-B20.........................................................0.48 kg (1.06 lbs.)
NS-C20......................................................... 0.68 kg (1.50 lbs.)
■ Subwoofer (NS-SWP20)
Type ..........................Bass reflex non magnetic shielding type
Driver ................................................16 cm (6-1/2") cone type
Nominal input power ....................................................... 30 W
Maximum input power .................................................. 100 W
Impedance ............................................................................ 6 Ω
Frequency response ..............................30 Hz-2 kHz (-10 dB)
-9 kHz (-30 dB)
Sensitivity ......................................................86 dB/2.83 V, 1 m
Dimensions (W x H x D) .......................262 x 264 x 287 mm
(10-3/8" x 10-3/8" x 11-1/4")
Wei ght ............................................................. 5.2 kg (11.5 lbs.)
Specifications are subject to change without notice.
Troubleshooting
Issue Possible cause Remedy
There’s no sound. The speaker cables are not
connected properly.
Make sure the speaker cables are connected properly.
The VOLUME control is set to 0. Turn up the VOLUME control.
The sound is very quiet. The speaker cables are not
connected properly.
Make sure the speaker cables are connected properly:
L (left) to L, R (right) to R, “+” to “+” and “–” to “–”.
The subwoofer is too
quiet.
The source material doesn’t
contain much bass.
Try playing source material that contains more bass.
Bass sounds are being cancelled
out by standing waves.
Reposition the subwoofer, or break up parallel wall surfaces
by placing bookshelves or other large objects along the wall.
Specifications
