Yamaha KMS-301 Owners manual
Thank you for selecting this Yamaha KMS-301 speaker system.
KMS-301
Natural Sound
Bass-Reflex Type
Full-Range Speaker System
PRECAUTIONS
Read these precautions carefully before operating
your speaker system.
● Any time you note distortion, reduce the volume
control on your amplifier to a lower setting. Never
allow your amplifier to be driven into “clipping”.
Otherwise, the speaker may be damaged.
● This speaker system incorporates a speaker
protector. However, if you will drive speakers with a
high-power amplifier, first decrease the volume to
minimum, then turn the power on, and increase the
volume slowly. If high power output above a certain
level is applied to the speakers suddenly, the
protector will not function and so the speakers will
be damaged.
● Do not attempt to clean the speaker with chemical
solvents as this might damage the finish. To clean,
wipe with a dry, soft cloth.
● To prevent the enclosure from warping or
discoloring, do not place the speaker where it will be
exposed to direct sunlight or excessive humidity.
● Do not place the speaker where it is liable to be
knocked over or struck by falling objects. Stable
placement will also ensure better sound
performance.
● Placing the speaker on the same shelf or rack as
the turntable can result in feedback.
● Secure placement or installation is the owner’s
responsibility.
YAMAHA shall not be liable for any accident
caused by improper placement or installation of
the speaker.
CONNECTING TO YOUR AMPLIFIER
● Connect the left speaker to the left (marked L)
terminals of your amplifier, and the right speaker to
the right (marked R) terminals, making sure not to
reverse the polarity (+, –). If one speaker is
connected with reversed polarity, the sound will be
unnatural and lack bass.
■ CONNECTIONS
● Connect the push-type input terminals at the rear of
the speakers to the speaker output terminals of your
amplifier with commercially available speaker
cables.
Procedures:
➀ Press the tab on the terminal down, as shown in
the figure.
➁ Insert the bare wire end properly into the terminal
hole. [Remove approx. 10 mm (3/8”) insulation
from the speaker cable.
➂ Remove your finger from the tab to allow it to lock
snugly on the cable’s wire end.
➃ Test the security of the connection by tugging
lightly on the cable at the terminal.
Note
Do not let the bare speaker wires touch each
other as this could damage the speaker and/or
the amplifier.
R
L
Press tab
Black (–)
Red (+)
Speaker cable
10 mm
Left speaker (A)
Right speaker (B)
Speaker output terminals
of the amplifier
Good No good
BEFORE MAKING CONNECTIONS, MAKE SURE THAT THE AMPLIFIER IS SWITCHED OFF.
REMOVING THE FRONT COVER
The front cover is fastened to the enclosure at four
points, and can be removed if desired. To remove the
cover, hold on to both sides and slowly pull straight
away from the speaker. To reattach, line up the four
pegs on the inside surface of the cover with the four
corresponding holes on the speaker and push gently.
Notes
● When the cover is removed, take care not to touch
the speaker units with your hands or to exert
excessive force with tools.
●
This bass-reflex type speaker has an opening on the
front side.
Be careful not to obstruct the opening or put some
objects into it. If doing so, the sound will be
unnatural or it may cause damage to the speaker
and/or amplifier.
Built-in speaker protector
This speaker system incorporates a speaker
protector which protects the speakers from
excessive input. Once an excessive input is
applied to the speakers, the protector functions
and cuts out sound output from the speakers. If it
occurs, decrease the volume on the amplifier.
After several seconds, the protector stops
automatically and sound output revives.
SPECIFICATIONS
Type................Full-range bass-reflex speaker system
Magnetic-shielding type (EIAJ)
Speaker Unit......................12 cm cone type (JA1234)
Input Terminal .............................................Push-type
Nominal Impedance.........................................6 ohms
Frequency Response...........50 Hz – 20 kHz (–15 dB)
Nominal Input Power............................................40W
Maximum Input Power .......................................120W
Sensitivity ...................................................90 dB/w/m
Dimensions (WxHxD)..................273 x 167 x 211 mm
(10-
3
/4” x 6-9/16” x 8-5/16”)
Weight.........................................3.0 kg (6 lbs. 10 oz.)
* Specifications subject to change without notice due
to product improvements.
* Care should be taken not to exceed the input power
values noted above.
This speaker system is designed for use in a side
long way.
Note
Though this speaker system is a magnetic shielding
type, there may be an influence on TV picture
according to the type of TV or the placement of the
speakers. In such a case, place the speakers apart
from the TV so that there is no influence on TV
picture.
You can also use the screw holes on the rear or on
top of the speaker for installing the speakers on the
wall or the ceiling by using commercially available
mounting brackets.
Opening
Right speaker
Front cover
Peg
Hole
A screw with a diameter of 5 mm and
a pitch of 0.8 mm can be used.
(Depth of hole : 8 mm)
60 mm
Rear
Top
60 mm
90 mm
48.5
mm
PLACING THE SPEAKER
WARNING
● The required length of a screw differs depending on
the mounting bracket to be used. Select a screw
which is suitable for use with the mounting bracket
and can be fully inserted into the hole on the
speaker.
● Each speaker weigh 3.0 kg (6 lbs. 10 oz.). Do not
attach them to thin plywoods or soft wall surface
materials, as the screws may tear free from flimsy
surfaces, causing the speakers to fall and be
damaged, or result in personal injury.
● Do not fasten the speakers to walls with nails,
adhesives, or other unsound hardware. Long-term
use and vibrations may cause them to pull free.
● To avoid accidents resulting from tripping over loose
speaker cables, fix these to the wall along with the
speakers.
VV30830
Left speaker (A)
Right speaker (B)
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