Page 2 - Important Safeguards and Precautions:; Always keep the total speaker impedance at or above the rated load.; CAUTION; TABLE OF CONTENTS; B4R Bass Amplifier
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...
Page 3 - An Introduction to your new Ampeg B4R Bass Amplifier; We recommend going over them before you use the amplifier.; Features
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 upto 1350 watts of unsurpassed musical p...
Page 4 - The Front Panel Controls and Their Use; POSITION 2: Traditional passive tone setting; loud playing without “muddiness”
4 The Front Panel Controls and Their Use -15dB 0dB GAIN INPUT BASS STYLE ULTRA 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 (activeor passive – typically passive) or a line level signal may beconnected h...
Page 5 - The Front Panel Controls and Their Use – Con’t.
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 DEFEAT: The B4R employs internal limiter circuitsto help keep the power amplifier’s output clean at extremevolume levels. (All...
Page 6 - The Rear Panel; jacks must be used when oper-
6 The Rear Panel BI-AMP SPEAKEROUTPUTS HIGH OUTPUT LOW OUTPUT CHANNEL B CHANNEL A CHANNEL B CHANNEL A 350 WATTS/CH. @ 4 OHMS, STEREO500 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,...
Page 7 - The Rear Panel – Con’t.
7 The Rear Panel – Con’t. 32. FOOTSWITCH: Connect a two button footswitch to thisjack for remote Mute and EQ On/Off control. On the stereo1/4” plug, the tip controls Mute and the ring controls EQOn/Off. When a footswitch is connected, the Mute switch(#3) can still be used; however, the EQ switch (#1...
Page 8 - : Connect a heavy duty speaker cable terminated with a Speakon; Mono; Dual
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 Spea...
Page 9 - Biamp with a
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...
Page 10 - Some Suggested Settings; Since so many variables; Rack Mounting
GAIN BASS STYLE ULTRA MID TEXTURE MUTE TREBLE PEAK GAIN BASS STYLE ULTRA MID TEXTURE MUTE TREBLE PEAK GAIN BASS STYLE ULTRA MID TEXTURE MUTE TREBLE PEAK GAIN BASS STYLE ULTRA MID TEXTURE MUTE TREBLE PEAK IN GAIN BASS STYLE ULTRA MID TEXTURE MUTE TREBLE PEAK OUT IN IN IN OUT OUT OUT 10 Some Suggested...
Page 12 - Technical Specifications
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. Technical Specifications OUTPUT POWER RATING 1350 Watts Mono-Bridged @ 4 Ohms (1000 Watts Continuous) 840 ...