Yamaha F-20 User Manual

Thank you for purchasing a Yamaha F-20 Guitar Amplifier.

To get the best results and longest life out of your F-20, we recommend that you

carefully read this manual, and keep it in a safe place for future reference.

● To avoid possible damage do not expose the unit to:

• direct sunlight
• very high or low temperature/humidity
• sand or excessive dust
* Especially inside a vehicle, the temperature may rise

● Before connecting/disconnecting cables or turning the unit on/off, be

sure to set the VOLUME/MASTER VOL. control on the F-20 to 0.

● Keep the F-20 away from neon signs or fluorescent lighting to prevent

noise pickup.

Rated Output Power : 20 W

Speaker : 20 cm x 1

Controls : VOLUME, GAIN, MASTER VOL., TREBLE, MIDDLE, BASS,

CH SELECT switch (A/B)

Input/Output Terminals : INPUT, AUX IN, PHONES

q INPUT : 

Connect your guitar to this jack.

w CH SELECT A/B (Channel Select Switch A/B) : 

Depress

the switch (>) to select Channel B which, can be used to create
distortion. When the switch is in its raised position (?), Channel A is
selected producing a clean, distortion free tone.

e VOLUME : 

This knob controls the volume level of Channel A. This

knob functions only when Channel A is selected (?) with the CH
SELECT switch (the Channel A LED will light).

r GAIN : 

This knob is used to control the amount of distortion. Rotate

the knob to the right to increase distortion. This knob functions only
when Channel B is selected (>) with the CH SELECT switch (the
Channel B LED will light).

t MASTER VOL. : 

This knob is used to control the volume level of

Channel B. This knob functions only when Channel B is selected (>)
with the CH SELECT switch (the Channel B LED will light).

● Handle the unit carefully — never apply excessive force to the

controls and avoid dropping the unit.

● For safety, always remove the power plug from the AC wall outlet if

there is any danger of lightning striking in your area.

● To prevent damage and possibly electrical shock, never open the

case and tamper with the internal circuitry.

● Never use solvents such as benzene or thinner to clean the F-20.

Wipe clean with a soft, dry cloth.

y TREBLE : 

This knob controls the level of the amplifier’s high fre-

quencies.

u MIDDLE : 

This knob controls the level of the amplifier’s mid fre-

quencies.

i BASS : 

This knob controls the level of the amplifier’s low frequen-

cies.

o AUX IN : 

Connect the output of an external audio device such as a

CD, MD, cassette deck, etc, to this jack to listen to audio playback of
the device, along with your guitar, through the F-20 amplifier.

!0 PHONES : 

Connect a pair of headphones to this jack.

!1 POWER : 

This is the amplifier’s power switch. When the switch is

ON, the LED lamp of the channel currently selected with the CH SE-
LECT switch will light.

Power Requirements : U.S. and Canadian models : 120V, 60Hz

General model : 230V, 50Hz

Dimensions (W x H x D) : 357 x 330 x 197 mm (14.1" x 13" x 7.8")

Weight : 6.5 kg (14 lbs 5 oz)

Owner’s Manual

w

e

r

t

y

u

i

o !0

!1

q