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Ampeg B4R manual

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Table of contents for the manual

  • Page 1

    Owner ’ s Guide for the B4R Bass Amplifier Made in the U.S.A. by[...]

  • Page 2

    2 Important Safeguards and Precautions: All Ampeg products are designed for continuous safe operation, as long as common sense is used and steps are taken to help avoid certain problems. Abiding by the following rules can help prevent damage to your amplifier , yourself and others. • The amplifier is equipped with a three-pronged AC power cord. T[...]

  • Page 3

    3 An Introduction to your new Ampeg B4R Bass Amplifier Thank you for making one of the best choices you will ever make for your musical career – choosing one of the finest bass amps available, the Ampeg B4R. This versatile and powerful bass amplifier delivers up to 1350 watts of unsurpassed musical power , and of fers several outstanding features[...]

  • Page 4

    4 The Front Panel Controls and Their Use -15dB 0dB GAIN INPUT BASS STYLE UL TRA MID TEXTURE MUTE PEAK 33Hz 80Hz 150Hz 300Hz 600Hz 900Hz 0 +12dB -12dB 1 2 6 7 5 8 9 3 4 18 1. 0dB INPUT : The signal output from an instrument (active or passive – typically passive) or a line level signal may be connected here by means of a shielded instrument cable.[...]

  • Page 5

    5 The Front Panel Controls and Their Use – Con’t. 12. GRAPHIC EQ: This switch activates the graphic equaliz- er . When a footswitch is used, this switch is disabled. 13. LIMIT DEFEA T : The B4R employs internal limiter circuits to help keep the power amplifier ’s output clean at extreme volume levels. (All amplifiers may begin to clip their o[...]

  • Page 6

    6 The Rear Panel BI-AMP SPEAKER OUTPUTS HIGH OUTPUT LOW OUTPUT CHANNEL B CHANNEL A CHANNEL B CHANNEL A 350 WATTS/CH. @ 4 OHMS, STEREO 500 WATTS/CH. @ 2 OHMS, STEREO 2 OHM MINIMUM LOAD 1000 WATTS @ 4 OHMS, MONO BRIDGE 4 OHM MINIMUM LOAD MONO BRIDGE + – *MONO BRIDGE: 1+ HOT, 2+ RETURN BIAMP: 1+ LOW HOT, 1– LOW RETURN 2+ HIGH HOT, 2– HIGH RETURN[...]

  • Page 7

    7 The Rear Panel – Con’t. 32. FOOTSWITCH: Connect a two button footswitch to this jack for remote Mute and EQ On/Off control. On the stereo 1/4” plug, the tip controls Mute and the ring controls EQ On/Off. When a footswitch is connected, the Mute switch (#3) can still be used; however , the EQ switch (#12) is dis- abled. 33. BIAMP HIGH/LOW OU[...]

  • Page 8

    8 Connections: In the example shown below , the B4R’ s two internal power amplifiers are bridged together to produce maximum output power . Set the Stereo/Mono Bridge switch to the IN (Mono Bridged) position and connect the system as follows: 1: Connect a heavy duty speaker cable terminated with a Speakon ® connector or dual banana plugs from th[...]

  • Page 9

    In the example shown below , the B4R ’ s two internal power amplifiers will power both a high frequency cabinet and a low frequency cabinet. The crossover point is determined by the Frequency control (#16). Set the Stereo/Mono Bridge switch to the OUT (Stereo) position and connect the system as follows: 1: Set the Full Range/Biamp switch to the I[...]

  • Page 10

    GAIN BASS STYLE UL TRA MID TEXTURE MUTE TREBLE PEAK GAIN BASS STYLE UL TRA MID TEXTURE MUTE TREBLE PEAK GAIN BASS STYLE UL TRA MID TEXTURE MUTE TREBLE PEAK GAIN BASS STYLE UL TRA MID TEXTURE MUTE TREBLE PEAK IN GAIN BASS STYLE UL TRA MID TEXTURE MUTE TREBLE PEAK OUT IN IN IN OUT OUT OUT 10 Some Suggested Settings ROCK: JAZZ: COUNTR Y : BRIGHT : FUN[...]

  • Page 11

    11 T roubleshooting In the unlikely event that your B4R should malfunction, take a few minutes to troubleshoot it before you call for ser- vice. Y ou can save yourself time and money by doing it yourself, and often the problem is something quite simple. If the problem isn ’ t covered above, or if the steps lead you here, then contact your Ampeg d[...]

  • Page 12

    P/N 47-618-03 . 07/99 Ampeg reserves the right to change specifications without notice. Ampeg is proudly Made in America. © 1999 SLM Electronics, 1400 Ferguson Avenue, St. Louis, MO 63133 U.S.A. T echnical Specifications OUTPUT POWER RA TING 1350 W atts Mono-Bridged @ 4 Ohms (1000 W atts Continuous) 840 W atts Mono-Bridged @ 8 Ohms (680 W atts Con[...]