AMPEG SJ-12R Owner's Manual
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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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MODEL SJ-12R |
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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.
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