
Anthony Easton
The Ultraphonix MKII by Vertex is an overdrive pedal designed to replicate the tone and feel of a Dumble™ Overdrive Special (ODS) amplifier. It is 30% smaller than the original Ultraphonix and is voiced alongside four Dumble™ ODS amps ranging from the 1970s to the 1990s. The pedal is equipped with a RATIO control, allowing users to blend clean and distorted signals to their preference.
Key Features:
- Voiced alongside four Dumble™ ODS amps from the 1970s-1990s
- Quintessential D*style tone, note bloom, and harmonic overtones
- 100% Analog Circuitry
- Mechanical "True Bypass" Switching
- Assembled in California
- 9VDC center-negative power operation (adapter not included)
Controls:
- Volume
- Filter
- Level
- Ratio
Specifications:
- Input Impedance: 670 ohms
- Output Impedance: 100 ohms
- DC Voltage: 8.0-9.6V (9.8V MAX)
- Current Consumption: Less than 25mA
Dimensions:
- 4.6” x 2.125” x 1.8”
The Ultraphonix MKII provides users with ultimate control over their overdrive tone, with extra gain-shaping controls including Master Volume, Input Gain "Level," and Distortion/Saturation "Ratio." Additionally, the pedal features a "FILTER" knob for sculpting the upper-mids from 800Hz to 1.6kHz, allowing for additional presence and harmonic saturation. The pedal is designed to deliver a wide-open and amp-like sound at all volume levels.
The Ultraphonix MKII is a versatile overdrive pedal suitable for guitarists seeking to achieve the coveted D-style tone without the need for a Dumble™ amplifier.
Watch the latest video demos and reviews for the Ultraphonix MKII from YouTube. Stompbx updates this every six months to reflect the most popular reviewers and guitar pedal demos for each pedal.

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Anthony Easton
Anthony Easton
Anthony Easton
Anthony Easton
Anthony Easton
Anthony Easton
Anthony Easton
Anthony Easton
Anthony Easton
Anthony Easton
Anthony Easton