Thank you for selecting the Ampeg Classic Jet guitar amplifier. Revived from the sixties and ready for the nineties, 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.
The Front Panel:
JET II
MODEL J-12T
3 2 4 5 6 7 8 13 0 10 9 2 14 0 B 10 9 3 4 5 6 7 8 2 15 0 T 10 3 4 5 6
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. Tone controls the overall tonal character of the amplifier. Rotating the knob toward the �T� increases the higher frequencies, giving a brighter, more �crisp� sound. Rotating the control towards the �B� reduces the high frequencies, giving a darker, more �muffled� sound. The Tone control offers a cut or boost of 30dB at 4kHz.
5. Tremolo-Speed sets the rate at which the tremolo effect �vibrates.� The Tremolo-Intensity control (#6) must be turned up to hear the effects of this knob�s setting. 6. Tremolo-Intensity sets the depth of the tremolo effect. For slow, smoother vibrato effects try the Intensity control at around 6 and the Speed control at 1. For the really wild sounds, crank the Intensity up towards 8 (or beyond) and go from there. 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 connection 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: EL84 / 6BQ5 (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.
