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Ampeg B-200R manual

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Table of contents for the manual

  • Page 1

    [...]

  • Page 2

    T able of Contents: Introduction .............................................................................................3 The Front Panel ...................................................................................4,5 Important Information About T ubes and T ube Products A Brief History Of The T ube ....................................[...]

  • Page 3

    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 this user ’s guide prior to its use. 3 Intro[...]

  • Page 4

    1. 0dB Input accepts a standard 1/4” instrument plug from your bass. This input is suited for use with instruments that have passive electronics. 2. -15dB Input accepts a standard 1/4” instru- ment plug from high output basses. This input is padded 15dB to compensate for higher output sources and is suited for use with basses that have active e[...]

  • Page 5

    13. Master controls the overall output level of the amplifier . 14. XLR Line Out supplies a mono line level sig- nal for connecting to a mixing console, tape recorder or external amplifier . The signal at this jack is pre-Master and post-EQ. 15. Phones allows the connection of a pair of stereo headphones for private practice ses- sions. The interna[...]

  • Page 6

    Important Information About T ubes and T ube Products: 6 A Brief History Of The T ube: In 1883, Edison discovered that electrons would flow from a suspended filament when enclosed in an evacuated lamp. Y ears later , in 1905, Fleming expanded on Edison's discovery and creat- ed the "Fleming V alve". Then, in 1907, Dr . Lee de Forest [...]

  • Page 7

    Important Information About T ubes and T ube Products (continued): 7 Preamp T ube T ypes And Usage: The tubes used in the preamplifier (12AX7, 12AU7, 12A T7, etc.) amplify the signal from your instrument and shape the sound. They are inherently microphonic (mechanically pick up and transmit external noises). Since these tubes are used in the critic[...]

  • Page 8

    Important Information About T ubes and T ube Products (continued): 8 The Nature Of T ubes: Why (And When) T o Replace Them: T ubes are made up of a number of fragile mechanical components that are vacuum-sealed in a glass envelope or bubble. The tube's longevity is based on a number of factors which include how hard and often the amplifier is [...]

  • Page 9

    Important Information About T ubes and T ube Products (continued): 9 Survival T ips For T ube Amplifiers: T o prolong tube life, observe these tips and recommendations: • After playing the amplifier , allow sufficient time for it to properly cool down prior to moving it. A properly cooled amplifier prolongs tube life due to the internal component[...]

  • Page 10

    10 System Block Diagram: 0dB INPUT -15dB INPUT ULTRA LOW MASTER LINE OUT/ HP LEVEL 12AU7 TUBE LIMITER WITH HORN WITHOUT HORN XO POWER AMP LF SPEAKER HEAD PHONES BAL. LINE OUT LOW ULTRA MID LO MID ULTRA HIGH HI MID HIGH HF SPEAKER LF SPEAKER GAIN[...]

  • Page 11

    11[...]

  • Page 12

    B-200R TECHNICAL SPECIFICA TIONS: OUTPUT POWER RA TING 220 W atts RMS, 4 ohm load, 5% THD, 120 V AC SIGNAL TO NOISE RA TIO 70dB T ypical POWER REQUIREMENTS 120 V AC, 60 Hz, 320V A 100/120 V AC, 50/60 Hz, 320V A 230 V AC, 50/60 Hz, 320V A GAIN 38 dB UL TRA LOW +7dB @ 40Hz UL TRA MID -6dB @ 600Hz UL TRA HIGH +7dB @ 5kHz BASS ± 12dB @70Hz LOW MID ± [...]