Crazy Tube Circuits Golden Ratio (phi) V2

Compressor in Pedal Format!
  • Three independent analog compressor circuits: FET, OTA, OPTO
  • Switchable operating voltage: 9 V or 18 V for more headroom
  • Parallel compression via blend control for precise dynamic control
  • Compression ratio up to 20:1, attack time from 1 ms
  • Gain reduction LED for visual compression monitoring
  • True bypass, handmade in Greece
Bestprice
-4,00€ 204
instead of previously208
Article reduced to 03.06.2026
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Finance from 22,00 € per month
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Three Compressors in One Pedal - Purely Analog!

The Crazy Tube Circuits Golden Ratio F (Phi) V2 is a versatile, fully analog compressor pedal that combines three independent compressor circuits in a compact housing. With FET, OTA, and OPTO modes, it offers a wide range of tonal colors and dynamic behaviors selectable via a toggle switch. Thanks to the blend control for parallel compression and the option to choose between 9 V and 18 V operating voltage, the pedal adapts flexibly to different playing styles and instruments.

Three Tonal Characters for Maximum Flexibility

FET Mode

A feedback detector with FET transistor provides fast response and adds a characteristic coloration to the signal. Ideal for a punchy, slightly saturated tone.

OTA Mode

A feedforward detector that effectively catches fast transients and is excellent for limiting applications. Delivers a direct, tight sound with pronounced punch.

OPTO Mode

A hand-selected photoresistor combined with a feedback detector creates an organic, musical compression with smooth attack and release characteristics. Can be set very transparently.

Precise Control Over Your Dynamics

With controls for threshold, ratio, attack, release, blend, and volume, the Phi V2 offers comprehensive adjustment options. Compression ratios range from 1:1 to 20:1, and attack times start at 1 ms (FET/OTA) or 3 ms (OPTO). A gain reduction LED indicates the compression intensity, so you always stay in control.

Features

  • Compressor types: FET (feedback), OTA (feedforward), OPTO (feedback)
  • Controls: Volume, Blend, Ratio, Release, Attack, Threshold
  • Switch: 3-way toggle switch for FET/OTA/OPTO modes
  • Compression ratios: FET: 1.5:1–10:1; OTA: 1:1–20:1; OPTO: 1.5:1–15:1
  • Attack times: FET/OTA: 1–30 ms; OPTO: 3–33 ms
  • Operating voltage: 9 V or 18 V DC (internally switchable)
  • Current consumption: 50 mA
  • Bypass: True bypass
  • Connections: Mono In/Out (6.3 mm jack)
  • Dimensions: 125 x 72 x 55 mm
  • Weight: 350 g
  • Handmade in Greece

Scope of delivery

  • 1 x Crazy Tube Circuits Golden Ratio (phi) V2 Pedal

Specification

  • Product number 00113078
  • Colour Black

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Financing

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You can finance your order in convenient monthly installments from a value of €100.00.
Your contact persons

The hotline is currently not manned. You can reach us again on Wednesday, 20.05.2026 at 09:30.

Wednesday 09:30 - 18:00
Thursday 09:30 - 18:00
Friday 09:30 - 18:00
Saturday 09:30 - 13:30
Monday Closed
Tuesday 09:30 - 18:00