Bass Amplifier Owner's Guide

ManualsBrandsAmpeg ManualsMusical Instrument AmplifierB4R

Owner’s Guide

for the

B4R

Bass Amplifier

Made in the U.S.A. by

Summary of content (12 pages)

PAGE 1
Owner’s Guide for the B4R Bass Amplifier Made in the U.S.A.
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B4R Bass Amplifier TABLE OF CONTENTS Important Safeguards and Precautions . . . . . . . . . . . . . . .2 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 The Front Panel Controls and Their Use . . . . . . . . . . . . .4,5 The Rear Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6,7 Connections: Mono Bridged . . . . . . . . . . . . . . . . . . . . . .8 Dual Mono . . .
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B4R Bass Amplifier 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 offers several outstanding features. All of the features and controls of your B4R are covered in detail within the pages of this owner’s guide.
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B4R Bass Amplifier The Front Panel Controls and Their Use 18 33Hz 80Hz 150Hz 300Hz 600Hz 900Hz +12dB 0 -12dB INPUT GAIN STYLE BASS ULTRA MID 7 8 9 MUTE 0dB -15dB 1 2 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. The signal at this jack is sent into the preamp at full amplitude. 3 PEAK 4 5 6 7.
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B4R Bass Amplifier The Front Panel Controls and Their Use – Con’t. 19 2kHz 5kHz 8kHz 20 21 22 LEVEL POWER ACTIVE TREBLE EFFECTS MIX MASTER FREQUENCY BALANCE 300Hz FLAT GRAPHIC EQ DRY WET 50Hz LIMIT DEFEAT 10 11 12 13 1kHz LO HI LIMIT 14 15 16 12. GRAPHIC EQ: This switch activates the graphic equalizer. When a footswitch is used, this switch is disabled. 13.
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B4R Bass Amplifier The Rear Panel 33 BI-AMP HIGH OUTPUT *MONO BRIDGE: 1+ HOT, 2+ RETURN BIAMP: 1+ LOW HOT, 1– LOW RETURN 2+ HIGH HOT, 2– HIGH RETURN CHANNEL B – MONO BRIDGE LOW OUTPUT + 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 CHANNEL B 23 24 23. CIRCUIT BREAKER: The B4R employs an AC line circuit breaker to help protect against damage due to excessive current demands.
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B4R Bass Amplifier The Rear Panel – Con’t. 33 34 35 36 BI-AMP 37 38 39 LINE OUT 40 41 EFFECTS LOOP PRE/ POST H UT LOW OUTPUT LEVEL GND LIFT BAL. UNBAL. 1+ HOT, 1– O GE + SEND CHANNEL A TUNER OUT 1+ HOT, 1– CHANNEL A OHMS, STEREO OHMS, STEREO UM LOAD S, MONO BRIDGE UM LOAD KER UTS RETURN B4R CH. B CH. A FULL RANGE POWER AMP B BI-AMP POWER AMP INPUT POWER AMP A PREAMP OUTPUT POWER AMP INPUT PREAMP OUTPUT FT. SW.
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B4R Bass Amplifier Connections: In the example shown below, the B4R’s two internal power amplifiers are bridged together to produce maximum output power.
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B4R Bass Amplifier 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: Biamp: Highs / Lows B4R PWR AMP B PWR AMP A PWR AMP B PWR AMP A 1 3 IN 3 2 HIGH FREQ. CABINET(S) (BIAMP) 2 OUT TO INPUT JACK (STEREO) LOW FREQ.
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B4R Bass Amplifier Some Suggested Settings ROCK: GAIN STYLE BASS ULTRA MID TREBLE STYLE BASS ULTRA MID TREBLE STYLE BASS ULTRA MID TREBLE STYLE BASS ULTRA MID TREBLE STYLE BASS ULTRA MID TREBLE MUTE Since so many variables affect the actual sound of any system, the following settings are offered as starting points to help you find the exact sounds your playing demands.
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B4R Bass Amplifier Troubleshooting In the unlikely event that your B4R should malfunction, take a few minutes to troubleshoot it before you call for service. You can save yourself time and money by doing it yourself, and often the problem is something quite simple.
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B4R Bass Amplifier Technical Specifications OUTPUT POWER RATING 1350 Watts Mono-Bridged @ 4 Ohms (1000 Watts Continuous) 840 Watts Mono-Bridged @ 8 Ohms (680 Watts Continuous) 2 x 675 Watts @ 2 Ohms (500 Watts Continuous) 2 x 420 Watts @ 4 Ohms (340 Watts Continuous) 2 x 255 Watts @ 8 Ohms (205 Watts Continuous) TONE CONTROL RANGE Bass: Ultra Mid: Treble: GRAPHIC EQ LEVEL GRAPHIC EQ RANGE 33Hz: 80Hz: 150Hz: 300Hz: 600Hz: 900Hz: 2kHz: 5kHz: 8kHz: SIGNAL TO NOISE RATIO FOOTSWITCH JACK POWER REQUIREMENTS Do