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PW1

Hifi Products / Amplifiers / PW1

For many generations, true lovers of sound and music are inspired by vinyl playback. Even in these days of high performance digital audio playback systems it is hard to imagine a future without LP’s. There’s just something magical to it. 

Grimm Audio’s co-founder Peter van Willenswaard spent a life time designing and improving phono preamps, both in solid state and with tubes. Of all stages of audio amplification, phono preamplifiers pose the biggest challenges to a designer. With moving coil cartridges, deep bass signals of a mere 50 nV require no less than 90 dB amplification! 

“Vintage vinyl taught us that sound can be magical.“

For the PW1 “Phono Wizard”, Peter managed to develop a solid state phono preamplifier that matches his best tube based designs. Peter believes that designing a good phono preamp is not about achieving the lowest possible harmonic distortion as an isolated parameter. He searches for an elegantly minimalistic circuit design in which he optimizes the ‘electric environment’ of all the active components, in conjunction with a meticulously tuned power supply. Needless to say that passive components like capacitors and resistors are carefully picked.

The result is a well balanced design with Peter’s signature sound, that is very spacious, detailed and open, but at the same time rhythmically addictive and emotionally involving. 

The industrial design had to justify this quality. Michiel Uylings of MU1 fame matched the sonics with a simple but powerful cabinet shape and Grimm Audio’s design team made the copper shielded interior look like a piece of art. Truly a design for generations to come.

The PW1 has inputs for MM and MC elements and outputs on RCA and XLR. Thanks to a superiorly shielded power transformer there is no need for an external power supply.

PW1 features

  • Unique minimalistic electronic design
  • MC and MM cartridge inputs
  • RCA and XLR outputs
  • Gain and load settings under bottom plate
  • Internal silent linear power supply
  • Copper shielded interior
  • 100 x 100 x 250mm (WxHxD)
  • 5 year limited warranty
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PW1 downloads

  • Download the PW1 leaflet pdf
  • Read the PW1 manual pdf
  • Enjoy Introducing… the PW1
  • Read Designing the PW1 phono preamplifier
  • Learn about aligning your cartridge and arm

PW1 Reviews

  • Hifi Knights: PW1 conveys genuine emotions
  • HFN and The Ear: Best of 2025
  • Tracking Angle: PW1 is Classically Minimalist but World Class in Execution
  • Audio Satori: PW1 reveals the heart of vinyl
  • Hi-fi News: The PW1 will prove tough to beat
  • Hifi Advice: PW1 delivers everything
  • Analog Planet: PW1 is a captivating device
  • Lowbeats: PW1 has exemplary transparent sound
  • The Ear: PW1 makes vinyl better
  • Lite Magazin: PW1 unfolds enormous emotional power

Read all PW1 reviews >

PW1 News

  • Grimm Audio at Montreal Audiofest 2026
  • Terrason Audio and Eelco Grimm at Norddeutsche HiFi-Tage
  • Grimm Audio in 11 rooms at CAF show
  • Grimm Audio at Audio Video Show Warsaw 2025
  • Grimm Audio at High End Munich 2025
  • Grimm Audio at Axpona 2025
  • Alpha Audio interviews PW1 designer Peter van Willenswaard
  • Introducing… the PW1
  • Designing the PW1 phono preamplifier
  • MU2 and PW1 with Vivid Moya at iEar show

Read all PW1 news >

PW1 Photos

Cartridge loads can be set after opening a sliding panel on the bottom.

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Designed & made in the Netherlands

Designed & made in the Netherlands

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