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Ampeg introduced the new B4R this summer. The rackmount head boasts 1000 watts of mono-bridged power with new "texture" and "style" selectors for unique tone control.

The B4R's five position "style" control allows the player to choose from five different preamp settings. In addition, the "texture" control activates Ampeg's patented tube emulation circuit for a wide range of tones.

Other features of the B4R include: biampable operation, nine band graphic EQ, Optocoupler limiters, internal 24 dB/octave crossover, parallel/series effects loop with blend control, line out level control, XLR balanced output with ground lift and pre/post EQ line out switch to name just a few.

Ampeg product manager Tony Moscal states that "the B4R was designed as a professional bass amp offering high power and the flexibility of solid state design with new sound options via new controls and patented tube emulation circuit."

The B4R is covered by Ampeg's five year warranty and lists for $1,249.00.


  • 1000 Watts Mono-Bridged @ 4 Ohms
  • 700 Watts Mono-Bridged @ 8 Ohms
  • 500 Watts X 2 @ 2 Ohms
  • 350 Watts X 2 @ 4 Ohms
  • 200 Watts X 2 @ 8 Ohms
  • High Slew Rate Mosfet Power Amp Design
  • Input Gain Control With Peak Led
  • Dual 1/4" Inputs
  • Footswitchable Mute Function
  • Solid State/Tube "Texture" Switch
  • Three Bands Of EQ
  • Nine Band Graphic EQ
  • Graphic EQ Level Control
  • Panel Or Footswitchable Graphic EQ
  • Optocoupler Limiters
  • Internal 24 dB/Octave Crossover
  • Linkwitz-Riley State Variable Filters
  • 50 - 1K Hz Variable Crossover Point
  • High/Low Balance Control
  • Tuner Out Jack
  • Parallel/Series Effects Loop With Blend Control
  • Line Out Level Control
  • XLR Balanced Output With Ground Lift
  • 1/4" Line Outs
  • Pre/Post EQ Line Out Switch
  • 1/4" Biamp High And Low Outputs
  • Dual Preamp Out/Power Amp In Patch Points
  • Stereo/Mono Bridge Switch
  • Full Range/Biamp Switch
  • 1/4" And Bind Post Speaker Outs
  • 15 Amp Circuit Breaker
  • Continuously Variable-Speed Fan
  • Internal Fuses
  • Abundant Filter Capacitors
  • 1/8" Steel Front Panel
  • 16 Gauge Steel Chassis
  • Insulation Displacement Connectors
  • Relay Protected Outputs
  • Computer Assisted Circuit Board Layout
  • 19" X 15" X 5.25"
  • 39 Pounds
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