Ampeg J-20 JET Owner's Manual download pdf (Page 4)

J-20 Jet All-Tube Guitar Amplifier with Tremolo

4

The Front Panel

1. NORMAL: Use this jack to connect

your guitar to the amplifier using a

shielded instrument cable.

2. BRIGHT: Using this jack to connect

your guitar provides a high-frequency

boost compared to the Normal input,

for a brighter, punchier sound.

3. VOLUME: Use this to adjust the output

level of the amplifier.

4. TONE: This adjusts the overall tone of

the sound. Turning the control clockwise

(toward the “T”) increases the higher

frequencies for a brighter, crisper

sound. Turning the control counterclock-

wise (toward the “B”) reduces the higher

frequencies for a darker sound.

5. LAMP: This illuminates when the ampli-

fier is turned on.

6. SPEED: Use this to adjust the rate at

which the tremolo effect “vibrates.”

Turn the control counterclockwise to

slow down the tremolo effect, and turn

it clockwise to speed up the tremolo

effect.

Note: The Tremolo Intensity control (7)

must be turned up partway to hear the

effect of the Speed control.

7. INTENSITY: This controls the depth of

the tremolo effect. Turn the control coun-

terclockwise to lessen the intensity, and

turn it clockwise to increase the intensity

.

For a slow, smooth tremolo effect try

setting the Intensity control at about 6

and the Speed control at 1. For a really

wild tremolo, crank the Intensity up to 8

and increase the Speed control to 6 or 7

(or more).

8. ON/STANDBY Switch: Use this switch

to activate the amplifier after the On/Off

switch (9) is turned on.

Always turn this switch OFF first, and

ON last! Turn the On/Off switch (9) on at

least 30 seconds before turning on the

standby switch.

During short breaks, you should turn

this switch off, and leave the On/Off

switch on. This will help prolong the life

of the amplifier tubes.

9. ON/OFF SWITCH: Use this switch to

turn the amplifier on and off.

Always turn this switch ON first and OFF

last! Turn the Standby switch (8) on at

least 30 seconds after turning on the

On/Off switch.

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