The Kessler FX Toxic Twins is a dual overdrive pedal redefining the genre with its exceptional transparency and versatility. Combining the classic tones of a Marshall Blues Breaker and an Ibanez TS9 Tubescreamer, this pedal isn't just two overdrives in one; it's a meticulously crafted sonic tapestry woven from high-quality components and a design philosophy focused on preserving your guitar's natural voice. Forget muddy, indistinct overdrive; the Toxic Twins delivers rich, harmonic enhancement, even when both circuits are engaged simultaneously.This in-depth review explores the Toxic Twins' unique sonic character, its ease of use, and its stunning build quality. We'll delve into its performance with both single-coil and humbucker equipped guitars, examining how its transparent overdrive enhances, rather than obscures, your instrument's natural tone. We'll also discuss its subtle tonal customization options and evaluate whether its premium price point is justified by its exceptional craftsmanship and sonic capabilities. Get ready to discover a dual overdrive pedal that transcends expectations.
Pros And Cons
- Dual overdrive with Marshall Blues Breaker style and TS9 style sides.
- Modded circuits based on the originals.
- Transparent overdrive; allows both sides to be on without significantly altering the sound.
- High-quality construction and meticulous design.
- Nice knobs.
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Introducing the Kessler FX Toxic Twins
The Kessler FX Toxic Twins is a dual overdrive pedal, offering two distinct overdrive circuits in one compact unit. One side emulates the classic Marshall Blues Breaker, while the other channels the iconic Ibanez TS9 Tubescreamer. This unique combination provides a versatile range of overdrive tones, catering to various playing styles and musical genres.
Unlike many other dual overdrive pedals that offer widely different sounds, the Toxic Twins maintains a certain tonal coherence. This is because both circuits share a design philosophy focusing on transparency and responsiveness.
The Sound of Transparency
The reviewer emphasizes the 'transparency' of the Toxic Twins overdrive. This doesn't mean the pedal lacks character; rather, it implies the ability to maintain the guitar's natural tone while adding gain and harmonic richness.
The pedal's transparency allows both circuits to be used simultaneously without muddying the sound, even at higher gain settings. This versatility is highlighted as a key feature, creating a smooth and musical overdrive experience.
Build Quality and Design
The Toxic Twins boasts a meticulously crafted internal layout, showcasing high-quality components and a clean build. The pedal's enclosure is described as visually appealing in an army green finish.

The inclusion of dip switches allows for some tonal customization, though the reviewer prefers to leave them in their factory settings, trusting the builder's expertise.

Performance and Versatility
The reviewer tests the pedal with both single-coil (Burgundy Mist Strat) and humbucker (PRS 594) equipped guitars, showcasing its adaptability. The sounds with both guitars are clean and clear, enhancing the already great quality of the guitars themselves.
The ease of use and overall sonic quality are key factors in the positive review, highlighting the pedal's suitability for a wide range of players and musical contexts.
Conclusion and Final Verdict
The Kessler FX Toxic Twins receives high praise for its unique blend of transparent overdrive, versatile tone shaping, and exceptional build quality. The reviewer highlights the smooth and responsive nature of the knobs and the overall sonic character.

While the reviewer acknowledges the existence of other dual overdrive pedals, the Toxic Twins stands out due to its unique combination of features and its overall musicality. The overall design, build quality, and sound quality make this pedal a fantastic choice for both casual and professional players alike.
The high-quality components and craftsmanship contribute to the exceptional build quality and tone. The price point may be higher than some comparable pedals, but the quality and versatility justify this cost.