AMPEG SJ-12R Owner's Manual
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BASS
0
1
2
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9
10
DIMENSION
REVERB
0
1
2
3
4
5
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8
9
10
MODEL SJ-12RMODEL SJ-12R
GUITAR ACCORDION
VOLUME
0
1
2
3
4
5
6
7
8
9
10
ON
OFF
TREBLE
0
1
2
3
4
5
6
7
8
9
10
SUPERJET
MID
0
1
2
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10
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THE FRONT PANEL:
1. Guitar Input accepts a
standard 1/4” instrument plug
from your electric guitar. This
input is at 0dB level.
2. Accordion Input accepts
a standard 1/4” instrument
plug from high output electronic instruments. This input
is padded 6dB to compensate for higher output
sources.
3. Volume controls the overall output level of the amplifier. At lower volume settings
the sound will be clean. As
you push the volume higher
and crank your guitar the
sound becomes distorted.
4. Treble adjusts the output
level of the high frequency
and offers a cut or boost of
12dB at 6kHz.
5. Mid adjusts the output
level of the middle frequency
and offers a cut or boost of
16dB at 800Hz.
6. Bass adjusts the output
level of the low frequencies
and offers a cut or boost of
24dB at 50Hz.
7. Reverb-Dimension controls the amount of reverberation applied to the signal.
With the control at the “0”
position there is no reverb
applied; as the control is
turned towards “10” the
amount of reverb increases
accordingly.
8. Power light indicates the
amplifier is turned on by
glowing an iridescent blue
color.
9. Power switch is used to
turn the amplifier on and off.
THE REAR PANEL:
10. Power cord connects
the amplifier to a suitable
source of A.C. voltage. This
is a grounded, three-wire
cord and must be connected
to a properly grounded outlet. DO NOT attempt to
defeat the ground connec-
tion of the power cord! If
your amp was purchased
outside of the United States,
see the sticker next to the
A.C. connector for its power
ratings. Follow the above
guidelines.
11,12. Power Tubes: EL34 /
6CA7 (2)
13. Power Amp Phase
Splitter Tube: 12AX7A /
7025 (1)
14. Preamp Tube: 12AX7A /
7025 (1)
Replace tubes ONLY with
same types! Refer to
enclosed publication about
Tubes and Tube Amplifiers
for additional information.
15: Footswitch Jack is
located up inside the amplifier, just past the cabinet’s
covered back panel. Connect
the supplied footswitch here
for control of the Reverb
on/off and a switchable 15dB
of gain from 250Hz to 8kHz.
Thank you for selecting the Ampeg Classic SuperJet guitar amplifier. Inspired by the classic
Ampeg guitar amps of the sixties, this easy-to-use amplifier represents Ampeg’s quest to
provide you the finest instrument amplification systems available. In order to get the most
out of your new amplifier, please read these instructions before its use.
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