M5-HPA High Pass Mono Block Amplifier with Black or Silver Faceplate

Combining the M5 High Pass Amplifier (M5-HPA), the included 30-inch HPA interface cable, and your Vandersteen speakers yields a fully-powered solution optimized by the factory. This eliminates the need for another amplifier and an external crossover, so plug your pre-amplifier into this M5-HPA, and you are ready to play. The Price Shown Includes High-content Silver and Copper BiWire 30" HPA Interface Cable.

Starting at $19,990 / Pair

Prices shown do not include duty, taxes, or freight

Available Finishes

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(*) indicates upgrade finishes.

Vandersteen Audio has done its best to photograph these wood finishes on each product page, but please know that while the woods we receive from our vendors are unfailingly high in quality, no two pieces of wood are ever exactly alike. This is dictated by nature. We promise that your speakers will look gorgeous, but not that they will precisely match the photos you see on our website or on our dealers’ in-store demo speakers.

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The dramatic reduction in distortion realized by Vandersteen’s patented Perfect-Piston™ drivers (US patent #8320604) made it clear to Richard Vandersteen that the next speaker performance frontier would only be achieved by designing a radical new state-of-the-art amplifier from the ground up. The resulting flagship M7-HPA inspired a more compact, practical solution: the M5-High Pass Amplifier (M5-HPA). This high-pass amplifier is excellent with Quatros, SUB THREEs (combined with any brand loudspeaker), and KĒNTO Carbons.

For years, Vandersteen has employed amplifiers custom-tailored to each design in Vandersteen’s subwoofers and the equalized bass sections in its powered-bass loudspeakers in conjunction with passive high-pass filters for ultimate performance. When employing the HPA Interface cables combined with a powered-bass Vandersteen speaker, the M5-HPA mono-block creates an entirely powered loudspeaker system in which the amplification over the entire frequency range is driven by perfectly tailored amplification.

Richard Vandersteen is responsible for the M5-HPA’s overall design and architecture; the amplifier was developed and built in a partnership between Vandersteen Audio and Dean Klinefelter, a talented designer and engineer.

M5-HPA Design and Performance Features:

  • 300-Watts Into 4 Ohms
  • Zero-Feedback Design With Dual Single-Ended Circuits Connected By The Speaker Load
  • All Signal Transistors NPN Bipolars
  • Minimal Circuit Path (only 5 parts in the signal path) 
  • 10 Separate Power Supplies
  • All Analog Circuit Logic – NO DIGITAL PROCESSING OF ANY KIND
  • Integral 200 Hz, 100Hz, 80 Hz, 40 Hz, and 20 Hz adjustable High-Pass Filter
  • Aluminum Chassis with Noise Isolation Feet from HRS
  • No Emitter Resistors in the Output Stage
  • Buffer for Output is the Supplied Interface Cable
  • DBS - Dielectric-Bias-System
  • Made in the USA

    To read about customer experiences, click here.

M5-HPA Specifications

-Frequency response:  20, 40, 80, 100, 200Hz (switchable) -200KHz -3db High Pass Amplifier
-Power:  150 watts 8 ohms, 300 watts 4 ohms, 120 volt line
-Input impedance:  200K Balanced
-Gain: 25db
-Distortion: .15% at 150 watts
-Signal to noise: -90db A weighted 2 volts out.  -110 db full power
- 12 Volt Trigger
-Dimensions: 8 X 10.5 X 15.25
-Weight: 42 lbs gross 32 net
  • Dec 14, 2022

    The famed John Atkinson reviews the Quatro Wood CT together with the M5-HPA high-pass amplifiers.

    John Atkinson

    See Full Review