AMPEG B50R User Guide

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Thank you for selecting the Ampeg Rocket Bass amplifier. Inspired by the classic Ampeg bass 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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1.Input accepts a standard 1/4” instrument plug from your bass.

2.Headphones allows the connection of a pair of stereo headphones for private practice sessions. The internal speaker is disconnected whenever headphones are used.

3.Volume controls the overall output level of the amplifier and the level of the signal at the Headphones jack (#2).

4.Bass adjusts the output level of the low frequencies and offers a cut or boost of 12dB at 60Hz.

5.Low Mid adjusts the output level of the lower midrange frequencies and offers a cut or boost of 11dB at 200Hz.

6.High Mid adjusts the output level of the upper midrange frequencies and offers a cut or boost of 11dB at 1.2kHz.

7.Treble adjusts the output level of the high frequencies and offers a cut or boost of 13dB at 5kHz.

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.

10.Line Out (rear panel, not shown) supplies a mono, unbalanced signal for connecting to a mixing console, tape recorder or external amplifier. (By using a TRS plug the signal is balanced – tip is “+”, ring is “-”.)

11.Power cord (rear panel, not shown) 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.