Boss TB-2W Tone Bender

The Boss TB-2W Tone Bender is a limited-edition fuzz pedal from Boss, developed in collaboration with Sola Sound, the London company that made the original Tone Bender pedals in the 1960s¹. It is an authentic sonic recreation of the Tone Bender MK II, built into the classic Boss compact chassis, and released in a limited production run in 2021². It belongs to Boss's premium, Japanese-made Waza Craft series, where the "W" in the name signals Waza Craft and the "TB" stands for Tone Bender³.

The pedal carries the same knob designs and textured enclosure look as Sola Sound's Tone Bender, right down to labeling the enclosure in Sola Sound's original font, but housed in a Boss chassis⁴⁵. Each unit uses rare germanium transistors carefully tested for optimum tone, a three-way voltage selector, and selectable true or buffered bypass²¹.

A Tone Bender MK II fuzz in the Waza Craft series

The Tone Bender MK II was first introduced in the 1960s by Sola Sound, and its bold, rich voice and smooth sustain are, in the words of the announcement, "forever embedded in the annals of rock and pop music history"². Boss engineers set out to recreate that sound through meticulous analysis, working directly with Sola Sound rather than copying from secondhand schematics²¹¹.

The TB-2W sits in the Waza Craft series, Boss's line of premium Japanese-built pedals⁸⁹. Boss's own Waza Craft pages describe the series as one where engineers explore and analyze vintage designs, and note that while developing the limited-run TB-2W Tone Bender they examined many vintage fuzz pedals¹². The series later continued in fuzz form with the Boss FZ-1W, an original circuit rather than a recreation¹³.

The announcement described a refined circuit design intended to give ultra-consistent performance from pedal to pedal, a deliberate contrast with vintage germanium fuzzes, which vary widely unit to unit².

Built from Sola Sound's serial number 500 MK II

Rather than recreating a generic MK II, Boss and Sola Sound chose a specific reference unit: a "masterpiece" Tone Bender MK II with serial number 500, taken from Sola Sound's archive and used as the benchmark reference²¹. Premier Guitar's reviewer later filled in the backstory: the template was picked from Ant Macari's own trove of vintage treasures for its smooth-but-nasty character¹⁴.

• Reference unit: Tone Bender MK II, serial number 500, from Sola Sound's archive²¹
• Why it was chosen: Premier Guitar's reviewer described it as picked from Ant Macari's vintage collection for its smooth-but-nasty essence¹⁴
• Collaboration: Developed with Sola Sound, the company that produced the originals¹⁰¹¹

MusicRadar's Jonathan Horsley noted that circuit enthusiasts could presume the transistors would be a trio of Mullard 0C81D germaniums as per the reference pedal, though this was unofficial and never confirmed⁸.

The controls: Level, Attack and a three-way voltage selector

The control set mirrors the original MK II: two knobs labeled Level and Attack, plus a three-way voltage selector¹⁰². There is no tone knob; the voltage selector does the tone shaping work.

Premier Guitar's reviewer explained the voltage switch in detail: its three positions offer 7V, 9V and 12V settings, emulating a fading battery, standard 9V operation, and higher headroom, which the reviewer described as a Waza Craft touch that expands the pedal's dynamic range¹⁴. MusicRadar summarized the same switch as a way of "adding headroom or choking the fuzz for more extreme tone"¹⁵.

The bypass is also selectable: true bypass or buffered bypass operation, which Pedal of the Day called useful for inserting the pedal into different signal chains⁶².

Germanium transistors and the limited run

Each TB-2W uses rare germanium transistors, carefully tested for optimum tone, in the classic three-germanium-transistor fuzz topology of the original²¹¹⁴. Premier Guitar's reviewer reported that the whole effort hinged on Boss engineer Ikegami and his crew finding a reliable source of germanium transistors with consistent, matched values, and that they sourced enough to reliably build 3,000 TB-2Ws¹⁴⁶. Pedal of the Day gave the same figure: only 3,000 were made⁶.

Gearnews reported at announcement that the run would be limited purely because parts would be hard to source, with the release slated for spring 2021¹⁰. The pedal arrived in Q2 2021 as planned².

What reviewers said

Premier Guitar reviewed the pedal in 2023 and was positive about the result, writing that for a classic three-germanium-transistor fuzz it generates copious gain, and concluding¹⁴:

The same review framed the central question of the project as whether Boss could build a MKII that honors a MKII's many quirks and idiosyncrasies while living up to Boss's own manufacturing standards¹⁴. Pedal of the Day highlighted the sourcing and testing of the rare germanium transistors as the heart of the circuit⁶. Ed O'Brien of Radiohead, speaking in a Boss interview, named the Tone Bender Boss did with Macari's as a collaboration he liked¹⁷.

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