The Formula B Super Plexi is a pedal that emulates the sound of a Marshall JTM45 amplifier, a legendary British-made amplifier known for its warm and crunchy tone. This pedal is designed to provide a versatile overdrive and boost, allowing guitarists to achieve a wide range of tones.

Formula B

Demo by Revelation Cable Company

Demo by Living Room GD

Product Page

Review by The Gear Page

Review by delicious audio

Super Plexi

Der 4558 ist ein Overdrive, der um den berühmten OP-AMP 4558 herum gebaut wurde.
Und er ist unsere Vision des klassischen TS808.
Alles super ausgewählte Komponenten ohne Tantalkondensatoren und mit Originaldioden.

The 4558 is an Overdrive built around the famous OP-AMP 4558,
And it's our Vision on the classic TS808.
All super selected components with nos tantalum capacitors and original  diodes. 

Demo by Diego Leanza

Demo by Giovanni Invincible

4558 OD

Manual download

Vintage Vibe MK2

Three different sound flavour to choose. From the classic crunch with pronounced midrange frequencies, to SRV glassy tone. Up to the Mayer-style low-gain boost, and much more.

With the TS4558 you really get the sound of three overdrive pedals packed into one box.

Demo by  Isaia Marcolongo

TS 4558

Formula B shows us its reproduction of the famous Tone Bender MKI. It sounds very aggressive and it cut very well through the mix

Mini Bender mk1