0
10
VOLUME
0
10
BASS
0
10
MIDDLE
0
10
TREBLE
CLEAN
0
10
REVERB
0
10
MASTER
PHONES
POWER
ON
ST-100A
CAUTION
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
WARNING:
TO REDUCE THE RISK OF
FIRE OR ELECTRICAL SHOCK, DO NOT
EXPOSE THIS EQUIPMENT TO RAIN
OR MOISTURE
CAUTION:
TO REDUCE THE RISK OF
FIRE, REPLACE ONLY WITH THE SAME
TYPE OF FUSE.
G
S/No.:
CC
LINE OUT
LEVEL
LEVEL LEVEL
ST-100A
All-Tube Professional Amplifier
FOOT SW
GAIN &
CHANNEL
REVERB
4
STANDBY
ON
All-Tube Professional Amplifier
MASTER
1
2
3
4
5
6
7
8
9
21
22
EFFECTS
SEND
RETURN
23
24
25
26
27
28
2
0
10
VOLUME
0
10
BASS
0
10
MIDDLE
0
10
TREBLE
CLEAN
0
10
REVERB
0
10
MASTER
PHONES
POWER
ON
ST-100A
CAUTION
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
WARNING:
TO REDUCE THE RISK OF
FIRE OR ELECTRICAL SHOCK, DO NOT
EXPOSE THIS EQUIPMENT TO RAIN
OR MOISTURE
CAUTION:
TO REDUCE THE RISK OF
FIRE, REPLACE ONLY WITH THE SAME
TYPE OF FUSE.
G
S/No.:
CC
LINE OUT
LEVEL
LEVEL LEVEL
ST-100A
All-Tube Professional Amplifier
FOOT SW
GAIN &
CHANNEL
REVERB
4
STANDBY
ON
All-Tube Professional Amplifier
MASTER
1
2
3
4
5
6
7
8
9
21
22
EFFECTS
SEND
RETURN
23
24
25
26
27
28
2
ST-100A - Front Panel Features & Descriptions
1. POWER ON/OFF SWTICH:
Turns the ST-100A on and off.
2. STANDBY ON/OFF SWITCH:
Allows the ST-100A to remain
turned ON for limited periods of inactivity without the risk of
damaging / over-heating the amplifier tubes. When the Standby
switch is in the STANDBY position the ST-100A is in a non-
operational setting. When in Standby the Sovtek tubes remain
hot and ready for use. This bypasses the time required for the
tubes to warm up before use. When the Standby switch is in the
ON position the ST-100A is operational and should not be left
inactive. DO NOT turn on the ST-100A or have the Standby
switch set to ON without it connected to a loudspeaker.
3. INPUT / PHONE JACK:
Connects headphones to the ST-100A.
4. MASTER VOLUME:
Controls the overall signal level of the
ST-100A. To increase the overall signal and/or volume, rotate
the control clockwise. The Master volume control allows you to
preset the output levels of both the Clean and Overdrive
Channels.
5. REVERB CONTROL:
Adjusts the amount of reverb produced by
the amplifier. To increase the amount of reverb turn clockwise.
6. CLEAN CHANNEL - TREBLE:
Adjusts the amount of high
frequency boost or cut as desired in the clean channel. Treble
adds brightness to your music. Turning the Treble control
clockwise will sharpen your sound, alternatively, turning the
control counterclockwise softens your sound.
7. CLEAN CHANNEL – MIDDLE:
Adjusts the amount of mid-range
frequencies as desired in the clean channel. Turning the middle
control clockwise will increase the amount of depth in your
music. Setting the control all the way to the left will make your
music sound more hollow.
8. CLEAN CHANNEL – BASS:
Adjusts the amount of low
frequency boost or cut as desired in the clean channel. Adding
bass will increase the warmth of your sound.
9. CLEAN CHANNEL – VOLUME:
Controls the overall signal level
of the clean channel.Adjusting the volume control enables you to
produce sparkling clean sounds to crunchy, dirty blues. Turned
all the way to the left you will experience clean sounds. A setting
all the way to the right will produce moderate levels of distortion.
21. LINE OUT JACK:
Connects the ST-100A to an external line-
level device such as a mixing board.
22. LINE OUT LEVEL CONTROL:
Controls the output capacity of
the Line Out Level.
23. EFFECTS - SEND JACK:
Connects to the ST-100A to the input
off an effects unit.
24. EFFECTS – SEND LEVEL:
Controls the sending level output to
an effects unit.
25.EFFECTS – RETURN LEVEL:
Controls the input capacity of
the returning signal from an effects unit.
26. EFFECTS – RETURN JACK:
Connects the ST-100A to the
output of an effects unit.
27. FOOTSWITCH – GAIN AND CHANNEL SWITCH:
Switch
between Gain 1 and Gain 2 in the overdrive Channel. Also
switches between clean and overdrive channel.
28. FOOTSWITCH – REVERB INPUT JACK:
Connects footswitch
to turn Reverb On/Off.
29. SPEAKER SELECT SWITCH:
Allows you to select appropriate
ST-100A - Rear Panel Features & Descriptions
To reduce the risk of fire or electrical shock, do not expose this unit to rain
or moisture. Do not operate your ST-100A near a pool or other standing
water. Make sure all blades on the polarized power plug are fully inserted
into the power source. Ensure the powercord is not stretched, pinched or
otherwise abused. Ensure the power cord is routed to avoid foot traffic.
Your ST-100A amplifier should be cleaned only with a dry cloth.
WARNING: SHOCK HAZARD!
4
