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GT50H FRONT PANEL
INPUT
CLEAN
VOLUME
BRIGHT
NORMAL
Tube Lead
Series
1
2
3
1. GUITAR INPUT: 1/4" two-conductor jack.
2. CLEAN VOLUME: Adjusts the relative volume of the
clean channel.
AC IN
FUSE
TRIODE
25W
HEATER
ANODE
12W
250V/T 5A
250V/T 500mA
3. BRIGHT/NORMAL
frequencies on both the Clear and Lead channels when
TRIODE / PENTODE
switched to the "Bright" position.
CAUTION:
ENSURE THE DEVICE IS DISCONNECTED
~ 120V AC 50/60Hz 150W
FROM THE MAINS BEFORE REPLACING
T3.15AL/250V FUSE
THE FUSE. ONLY USE FUSES OF THE
SAME TYPE AND RATING.
4. HIGH GAIN/LOW GAIN: This switch increases the
preamp gain level on both the Clean and Lead channels
when switched to the "High Gain" position.
5. GAIN: This control increases or decreases the gain level
on the Lead channel.
6. BASS: This control increases or decreases bass
frequencies for both channels.
7. MID: This control increases or decreases mid range
frequencies for both channels.
8. TREBLE: This control increases or decreases treble
frequencies for both channels.
9. LEAD VOLUME: This control adjusts the relative volume
of the Lead channel.
10. PRESENCE: This control adjusts the upper high
frequencies when the Lead Channel is selected.
11. LEAD/CLEAN:
Switches
Clean Channels.
3
w w w . a c o u s t i c a m p l i f i c a t i o n . c o m
GAIN
BASS
MID
HIGH
GAIN
LOW
GAIN
4
5
6
7
PENTODE
FOOT
SWITCH
50W
25W
SWITCH:
Enhances
the
MODE
SEND
BOOST
CHANNEL
REVERB
LEVEL
HIGH/LOW GAIN
BOOST
between
the
Lead
LEAD
TREBLE
PRESENCE
VOLUME
LEAD
CLEAN
8
9
10
11
12. REVERB: This control adjusts the level of the spring
reverb effect.
13. MASTER: This control adjusts the overall volume of
FX LOOP
MIX
the amplifier.
GT50H
high
14. HALF POWER SWITCH: This switch reduces the power
transformer output level to half power without
4 0HM
DRY
WET
RETURN
OR
8 0HM
changing the sound of the amplifier. Switch between
DESIGNED IN CALIFORNIA
MADE IN CHINA
50 watts and 25 watts when in Pentode mode. Switch
between 25 watts and 12.5 watts when in Triode mode.
CAUTION: The amplifier should be switched to
"STANDBY" before changing the transformer power
switch setting.
15. STANDBY: The Standby switch is used in conjunction
with the Power switch on tube amplifiers. The Standby
switch should be left in the off position for 2-3 minutes
after turning the Power switch on. This allows the
tubes to come up to operating temperature and will
extend the life of the tubes. The Standby switch should
be turned to the off position before turning the Power
switch off. The Standby switch can be used to turn off
sound from the amplifier while keeping the tubes at
operating temperature. Finally, the Standby switch
should be turned to the off position when changing
the position of the Half Power switch or the Triode/
Pentode switch in order to protect the amplifier and
extend the life of the tubes.
and
16. POWER: Turns the power on and off.
REVERB
MASTER
STANDBY
50W PENTODE
25W TRIODE
25W PENTODE
GT50H
12W TRIODE
12
13
14
15
Acoustic Amplification
SPEAKERS
P.O. Box 5111
Thousand Oaks, CA 91359-5111
www.acousticamplification.com
?????????
8 0HM
16 0HM
OR
&
8 0HM
16 0HM
&
16 0HM
POWER
16
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