Lemon Bass

Project overview

Bass pre-amp based on Orange AD200B Mkll, replacing the original unit tubes for more convenient dual opamps that make it more friendly to your pedal board while keeping a great tone with deep, dynamic low-end and a creamy yet focused mid-range.

Introduction

The Lemon Bass is an original circuit developed by Bajaman for FreeStompboxes, inspired by the now-iconic Orange AD200B MkII bass amplifier, emulating its gain structure by replacing the tubes from the original head for more convenient OpAmps, making it pedal-friendly while keeping its wide spectrum of vintage and modern tones.

This modern classic can cover every tonal spectrum you need, from Vintage Soul to Classic Rock, high-fidelity Funk to grinding Metal.

In this model, you can place Q1* as an SMD transistor or the classic through-hole version. Choose just one of both. Remember, the SMD J201 are more consistent quality-wise than its through-hole counterpart, which is plagued by fake Chinese counterfeits.

Controls

• Volume
• Gain
• Pre-amp
• Bass
• Mids
• Treble

For further analysis on this circuit take a look at this thread on Free Stomp Boxes Forum.

For any technical questions regarding this build don’t forget to check out our Facebook Group and our forum at Free Stomp Boxes.

Lemon Bass – Building Docs

Lemon Bass – Drilling Template