The circuit
The Mosferatwo is built around MOSFET transistors rather than the op-amp and diode arrangements common in overdrive designs. Karlsson counts three MOSFET gain stages, plus one for the input buffer and one for clipping3. Premier Guitar's news item on the pedal emphasizes the originality of the design: "Like all RhPf Electronics creations, Mosferatwo is not a clone, mod, or tweak, it's a fresh, fully original circuit built from the ground up"1.
The controls: Drive, Focus, and the Heart and Bite EQ
The pedal carries seven controls, and Karlsson notes that on the EQ and texture dials, more accentuation comes clockwise while counter-clockwise has a damping, smoothing impact3.
| Control | What it does |
|---|---|
| Drive | One knob covering two gain stages, spanning Boost > Drive > Distortion, for smooth transitions from subtle grit to snarling overdrive1 |
| Focus | Interactive control shaping both dynamic feel and frequency response, from bold and bloomy to tight and articulate1 |
| Level | Output level4 |
| Heart | Adds warmth and richness; a voicing switch offers Deep Resonant Lows or Punchy + Aggressive Mids42 |
| Bite | Adds edge and articulation4 |
The Heart and Bite pair form a two-part EQ: Premier Guitar describes them as "Two tuned boost controls with toggleable center frequencies, for sculpting warmth and cut through the mix with precision"1. The toggleable center frequencies mean each control can be shifted to a different part of the spectrum, not just boosted more or less1.
How it compares to RhPf's other pedals
RhPf's lineup includes several MOSFET gain pedals, and the Mosferatwo sits among them as one of the maker's two flagships. Karlsson reviewed the Mo(s)ghoul MOSFET distortion in August 2025 and drew the comparison directly: "where the Mosferatwo is more rounded, bolder, and fatter sounding"5. He also judged the Mosferatwo easier to dial in than the Mo(s)ghoul overall, and wrote that "I feel his high water mark to date is the Mosferatwo, while this Mo(s)ghoul runs that one fairly close in a number of ways"5.
RhPf has since released other MOSFET overdrives, including the Mosphoros, which Karlsson described as sounding quite a bit different from the Mosferatwo flagship6, and the Tri-Harmonic Phalanx, a three-band parallel gain stager6.
What reviewers said
Karlsson's review for Guitar Pedal X judged the Mosferatwo RhPf's high water mark to date, noting that it delivers pretty much instant satisfaction and is easier to dial in than the Mo(s)ghoul overall, though he felt that pedal runs it fairly close in a number of ways5. The same review describes it as "truly a wonderful Harmonic Overdrive"3.
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Questions
How is the Mosferatwo different from the RhPf Mo(s)ghoul?
Both are MOSFET gain pedals from RhPf Electronics, but Guitar Pedal X's Stefan Karlsson describes the Mosferatwo as more rounded, bolder and fatter sounding than the Mo(s)ghoul distortion. He also found the Mosferatwo easier to dial in overall, calling it his high water mark of RhPf's pedals to date, while the Mo(s)ghoul runs it fairly close.
Is the Mosferatwo a clone of another pedal?
No. Premier Guitar reports that, like all RhPf Electronics creations, the Mosferatwo is not a clone, mod or tweak of an existing design, but a fresh, fully original circuit built from the ground up. The circuit uses MOSFET transistors for three gain stages, plus one for the input buffer and one for clipping.
Can the Mosferatwo work as a clean boost?
The Drive control spans Boost, Drive and Distortion, so at its lowest settings it operates as a boost. Premier Guitar describes it as one knob covering two gain stages, for smooth transitions from subtle grit to snarling overdrive, which puts a clean boost at the start of that range.
Where can I buy the RhPf Mosferatwo?
Guitar Pedal X reports that the Mosferatwo is available direct from the RhPf Electronics Webstore, where it was listed at $179 as of July 2025, down from its launch price of $239.
Sources (6)
- RhPf Electronics Unleashes Mosferatwo Mosfet Overdrive, Premier Guitar, 2025-07-29
- Guitar Pedal X, Guitar Pedal X, 2025-05-29
- Guitar Pedal X, Guitar Pedal X, 2025-07-18
- Guitar Pedal X, Guitar Pedal X, 2025-12-04
- Guitar Pedal X, Guitar Pedal X, 2025-08-08
- Guitar Pedal X, Guitar Pedal X, 2026-03-05
