Vahlbruch 6-PHI-4 Phase/Shifter

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Vahlbruch 6-PHI-4 Phase/Shifter

Vahlbruch

6-PHI-4 Phase/Shifter

4.7 Expert Rating

Product Info

Article Number: 574975
Model: 6-PHI-4 Phase/Shifter
Price: $251.90

* Prices may vary. Check retailer for current pricing and availability.

The Vahlbruch 6-PHI-4 nails that vintage vibe – think early Pink Floyd or a Leslie speaker emulation. It's a beautifully simple, analog phase shifter that's surprisingly versatile thanks to the stage switching. If you're after a warm, swirling modulation without digital complexity, this is a great choice for players into classic rock, psychedelic sounds, and beyond.

Product Description

  • Vahlbruch 6-PHI-4 Phase/Shifter
  • Effect Pedal for Electric Guitar
  • Pure analogue phase/shifter pedal with 4 and 6 hand-selected vintage 2N5952 transistors and silent MagTraB button
  • For 4-stage script logo phaser sounds or 6-stage Univibe and Leslie-like sounds.
  • True Bypass
  • Controls: Speed
  • Volume
  • Intensity
  • Switches: Stages 4/6
  • LED: Effect On
  • Modulation speed
  • Foot switch: On/Off
  • Input and output: 6.3 mm jack
  • Power supply connection: Barrel connector 5.5 x 2.1 mm
  • centre negative
  • Current consumption: 40 mA
  • Power supply via 9 V DC mains adapter (not included in the scope of delivery) Suitable optional power supply unit: Art.#409939#
  • Dimensions (W x D x H): 115 x 70 x 48 mm
  • Weight: 240 g
  • Handmade in Germany

*Note:* No baterry operation possible

PROS
  • • Hand-selected vintage 2N5952 transistors deliver a warm, organic phase shifting tone.
  • • MagTraB footswitch provides silent, reliable on/off switching – a welcome upgrade.
  • • Versatile 4/6 stage switching offers both classic phaser and Univibe-like sounds.
  • • Solid German build quality ensures durability and long-term reliability.
CONS
  • • Lacks battery operation, requiring a dedicated power supply which adds to the cost.
  • • Limited control range might restrict experimentation for users seeking extreme modulation.
  • • Relatively compact size could be a squeeze for pedalboards with tight space constraints.

Product Video

Key Features

Effect Type Phase/Shifter (Phaser/Univibe)
Controls Speed, Volume, Intensity
Bypass Type True Bypass
Stereo Mono
Power Supply 9V DC Barrel Connector (5.5 x 2.1mm, center negative)
Dimensions 115 x 70 x 48 mm

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Frequently Asked Questions

The 6-PHI-4 has a warmer, more organic tone than the Phase 90, lacking its harsher edge. It’s closer to a vintage Univibe in character, with a smoother, more liquid swirl.
While 2N5952s are still available, replacement requires soldering skills and careful component matching to maintain the intended tone. It’s not a beginner-friendly repair.
While a standard 9V DC power supply *can* work, Vahlbruch recommends a regulated unit to ensure consistent performance and avoid potential issues. Using an unverified power supply could impact the pedal’s stability.

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