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Reverb
5.0 (2)
$226.54 6 available New
Thomann
4.8 (12)
$210.00 $208.00 $2.00 · All time low

Average Price: $217

High-end/Boutique

$50

$201+

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Price History

Based on price data from 1 merchant for "Crazy Tube Circuits (Phi) Golden Ratio FET / Optical Compressor V2". Prices shown reflect NEW condition. Tracking began Apr 19, 2026.

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Description

Unleash the power of precision and versatility with the Crazy Tube Circuits (Phi) Golden Ratio FET / Optical Compressor V2. Designed for both electric guitar and bass, this pedal is a game-changer in dynamic control, offering a fully analogue circuit that seamlessly integrates three distinct compressor types: FET, OTA, and OPTO. This unique blend allows you to tailor your compression with surgical precision, making it a must-have for any serious musician seeking that perfect, punchy tone.

The pedal’s intuitive control layout features Threshold, Ratio, Attack, Release, Blend, and Volume knobs, giving you total command over your sound. The Blend control is particularly noteworthy, offering parallel compression for the ultimate in tonal flexibility. A dedicated switch lets you toggle between the compressor circuits, allowing for quick tonal shifts and adaptability in any musical scenario.

Built with performance in mind, the Phi Compressor V2 includes true bypass for pristine signal integrity when disengaged, and a robust footswitch for reliable activation. It’s powered via a 9V DC adapter (not included) and features both input and output jacks to seamlessly integrate into any pedalboard setup. Handmade in Greece, this pedal exemplifies quality craftsmanship and sonic excellence.

Key Features:

  • Fully analogue circuit with FET, OTA, and OPTO compressor types
  • Controls: Threshold, Ratio, Attack, Release, Blend, Volume
  • Blend control for parallel compression
  • Switch for selecting FET/OTA/OPTO circuits
  • True bypass for signal integrity
  • Handmade in Greece
  • Power supply via 9V DC adapter (not included)

Product specs

Available since December 2021

FAQs

What type of compression does the Crazy Tube Circuits (Phi) Golden Ratio V2 offer?

The Crazy Tube Circuits (Phi) Golden Ratio V2 provides both FET and optical compression, allowing for a versatile range of dynamic control and tonal shaping.

Is the Crazy Tube Circuits (Phi) Golden Ratio V2 suitable for both guitar and bass?

Yes, the Crazy Tube Circuits (Phi) Golden Ratio V2 is designed to work well with both guitar and bass, offering transparent compression that maintains the character of the instrument.

How does the FET compression mode on the (Phi) Golden Ratio V2 affect the sound?

The FET compression mode on the (Phi) Golden Ratio V2 provides a fast response and a punchy, dynamic sound that is great for adding presence and sustain to your playing.

What power supply is required for the Crazy Tube Circuits (Phi) Golden Ratio V2?

The Crazy Tube Circuits (Phi) Golden Ratio V2 requires a standard 9V DC power supply with a negative center, commonly used for most guitar pedals.

Can the (Phi) Golden Ratio V2 be used for live performances and studio recordings?

Yes, the (Phi) Golden Ratio V2 is versatile enough for both live performances and studio recordings, providing reliable and high-quality compression in various settings.

Mike Hermans

Mike Hermans

Crazy Tube Circuits Golden Ratio

Video thumbnail for Crazy Tube Circuits Golden Ratio by Mike Hermans

Crazy Tube Circuits Golden Ratio

Mike Hermans

Mike Hermans

Video thumbnail for Crazy Tube Circuits Phi V2: Compression done right! by Living Room GD

Crazy Tube Circuits Phi V2: Compression done right!

Living Room GD

Living Room GD

Video thumbnail for THREE Compressors in ONE Pedal - Crazy Tube Circuits  - PHI Golden Ratio Compressor V2 by TheSuperFunAwesomeHappyTimePedalShow

THREE Compressors in ONE Pedal - Crazy Tube Circuits - PHI Golden Ratio Compressor V2

TheSuperFunAwesomeHappyTimePedalShow

TheSuperFunAwesomeHappyTimePedalShow

Reviews

PROS

  • Versatile with selectable compression modes (FET, OTA, OPTO) for various musical styles

  • Solid hardware with on-board options for increasing headroom and output

  • Low noise operation compared to other compressors

  • Clean blend feature allows mixing of dry and compressed signals

  • Three analog circuits offer tonal variety

  • Internal gain control adds grit and bite, especially in FET mode

  • Subtle EQ shifts between circuits for nuanced sound shaping

  • Can be used as a clean preamp or boost due to its overall tone quality

  • 18-volt internal setting enhances sound quality

CONS

  • Lack of scale markings on knobs makes precise adjustments challenging

  • Tendency to "pump" on sustained chords with certain settings

  • Lacks a dedicated tone control/EQ, limiting tonal adjustment options

  • Not suitable for users needing extensive control for live sound adjustments

Owner Insights

We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about Crazy Tube Circuits (Phi) Golden Ratio FET / Optical Compressor V2.

Features and functionality

  • The CTC Phi Golden Ratio V2 offers three modes of compression, including a popular Opto setting favored by bass players for its clarity.

    Source
  • The CTC Phi Golden Ratio V2 is noted for its ability to enhance single coil guitars, making them sound fuller without adding excessive low end.

    Source

Use cases and applications

  • The pedal is often used as a slight boost and light compression in the Opto setting, making it an "always on" pedal that subtly enhances tone.

    Source
  • Users appreciate the pedal's ability to create jangly tones, suitable for styles like Britpop and Indie, similar to Johnny Marr's sound.

    Source
  • The pedal excels in creating a "thick and juicy" clean tone when used as an "OD pedal for clean tone," without altering the sound's coloration.

    Source

User experience

  • Some users find it challenging to fully utilize the compression features, but note that the pedal excels when used for bass.

    Source

Comparisons

  • Compared to other compressors, the CTC Phi Golden Ratio is noted for its transparency, with some users favoring it over the visual feedback offered by the Empress.

    Source
  • Some users favor the Diamond CPR-1 for its tone-sweetening capabilities over the Origin Effects Cali76, citing its simpler control layout and unique tonal character.

    Source
  • The Crazy Tube Circuits Golden Ratio is praised for its versatility, being compared favorably to the Jackson Audio Bloom for its dual compressor sound capabilities.

    Source

Build quality

  • The CTC Phi Golden Ratio is praised for its robust construction, providing reliable performance in live and studio settings without concerns over build quality.

    Source

Critic Reviews

Crazy Tube Circuits Golden Ratio Phi v2 Compressor Review

compressorpedalreviews.com

The Crazy Tube Circuits Golden Ratio Phi V2 offers a standout blend of versatility and sound quality with three distinct compression engines packed into a compact design. Musicians can enjoy the crispness of the FET, the warmth of the Optical, and the punchy performance of the OTA engine, making it a playground for tone experimentation. However, the lack of dramatic differences between the engines may frustrate those seeking a quick, set-and-forget solution. While the comprehensive control options are a boon for detailed sound shaping, they could overwhelm less experienced users. Overall, it’s a solid choice for those willing to invest time in understanding its capabilities, but simplicity seekers might want to look elsewhere.

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