Stefan Karlsson

Director : Auteur : Author : Curator : Image Wrangler : Editor-in-Chief

"Going the extra mile on musical devices exploration and pushing the boundaries for what's possible or practical"

Blog

Drunk Beaver's Pedal Drop #42 is a brand new custom circuit - the Kubiansk Sub Fuzz - Dual OpAmp Twin Sub-Octave Fuzz

GPX BlogSep 4, 2026 14:09

The Kupiansk Sub Fuzz is an entirely custom design, a Vitalii original! It’s and OpAmp-based fuzz circuit (NOS Soviet KR574UD2V dual op-amp). The ...

Key 12A*7 Preamp Tube Types and Characteristics

GPX BlogSep 3, 2026 11:29

It’s been a while since I did my Key Power Amp ...

Ligma Electronics' 'You Need To Wake Up' is an interesting Mix of Room Reverb and Granular Buffer Effects

GPX BlogSep 2, 2026 22:57

There’s a lot going on with this pedal - with multiple functions on each control - whether Knob, Toggle-switch or Footswitch. The top ROOM REVERB ...

A Few Scant Details...

Co-Founder, Director of Marketing and Client Services at Affino, as well as Founder, Director, Author / Auteur at Guitar Pedal X - which started its life as a rather informal Blog on the Affino.com corporate site. I curate, write, photo-edit and retouch everything you see on this site - to give you as broad a scope of what's out there so you can better inform your gear-buying decisions.

I'm a long-term ever-budding and exploratory musician, home-player and avowed Guitar Gear enthusiast - with a predilection for Effects Pedals in particular. Generally very passionate about the Arts, Design, Architecture and Music above everything else...

Guitar Pedal X