Genz Benz Streamliner 900 STM-900 900W Bass Amp Head   

Product #H70983


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Tube preamp, 900W of power, and a simplified yet powerful tone stack.

The Streamliner™ STM-900 bass amp head from Genz Benz boasts a 300-volt, all-tube Class A preamp driven by three 12AX7 preamp tubes utilizing six gain stages. The STM-900's preamp design features an intuitive and highly effective tone network which is a unique blend of a modified passive Baxandall network for the bass and treble along with an active, tube-driven mid filter with selectable mid frequencies. The versatile all-tube preamp exudes a fat and rich tone that remains articulate. It can be used to simply add warmth to your natural tone or it can be dialed in to provide a wide range of natural tube overdrive.

The Streamliner™ 900 also features proprietary 3 Dimensional Power Management analog technology that adds heft and girth to each individual note while enhancing the amplifier;s responsiveness and headroom. It provides the dynamic and three-dimensional tone and feel of an all-tube power amp design.

With its solid extruded aluminum panels, CNC machined solid billet aluminum faceplate and smooth-radius edges the Streamliner™ 900 chassis emanates the ruggedness and strength of a world-class touring machine. This brushed aluminum chassis is finished in an anodized Tungsten finish.

The powerhouse behind the Streamliner™ 900 is a Class D amplifier and SMPS module, enhanced with patent-pending P.H.A.T. (Proprietary Heat Abatement Technology) topology. This delivers robust and reliable, high output performance in a tremendously compact and convenient package.

Simply put, the new design of the STM-900 offers a more streamlined approach to finding your voice, yet it still carries forth the GENZ BENZ reputation for performance, reliability, and innovation.


  • 500 watts @ 8 ohms; 900 watts @ 4 ohms
  • SMPS and Class D power amplifier design
  • 300-volt, all-tube Class A preamp with 3 - 12AX7 tubes
  • Modified passive Baxandall EQ for the lows and highs
  • Active tube-driven mid EQ
  • Selectable 3-position mid frequencies: 220, 600, 2.5K Hz
  • Input mute
  • Hi Gain switch
  • Master volume
  • 3DPM™ power management
  • Patent-pending P.H.A.T topology
  • Full direct output interface
  • Effects loop
  • Headphone out
  • Aux input
  • Dual Speakon outputs
  • Variable-speed fan cooling
  • Patent-pending P.H.A.T. topology

A new level of power with simple, effective tone controls from Genz Benz. Order now.

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