Yamaha F-20 - 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

* E s p e c i a l l y i n s i d e a v e h i c l e , t h e t e m p e r a t u r e m a y r i s e

excessively — do not leave the F-20 in your parked car on a
sunny day!

●

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.

Precautions

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

Control Panel

Specifications

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.

A Channel

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).

B Channel

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.

Tone Controls

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.

* Use the volume control on the audio device to control its volume level.

!0

PHONES :

Connect a pair of headphones to this jack.

* The speaker will produce no sound when a pair of headphones is con-

nected 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)

GUITAR AMPLIFIER

Owner’s Manual

* Specifications and external appearance are subject to change without notice.

w

e

r

t

y

u

i

o !0

!1

q