Product Format Clarification

This product includes digital design files only — no physical PCB is shipped.

With these files, you can order PCBs directly from a manufacturer (e.g., JLCPCB, PCBWay) for as little as $2 for 5 boards.
Typical production time is 3 days, and international shipping starts at $12, taking about 4 days via DHL to most locations.

You’re free to edit the design and add your own branding.

Upon Purchase, You’ll Receive:

• Eagle CAD files (.SCH & .BRD) — fully editable and compatible with KiCad

• Industry-standard Gerber files for PCB fabrication

• Quick-start guide explaining how to use the files

• Download link for the free version of Eagle CAD

After purchase, you will receive a payment link by email. Once the payment is completed, the design files will be sent to you within 8 hours. We’re currently working on automating this process, but for now, orders are handled manually.

Note: You must use these files with a PCB manufacturer to produce your boards.
No pre-assembled or pre-made circuit boards are included.

These design files are intended for personal use and small production runs of your own pedals, not for resale as kits or standalone PCBs.

Project overview

Check the latest onboard preamplifier from the house of Dark Glass, now in the form of a pedal! 

The original Tone Capsule Bass is an active circuit that usually goes installed inside the bass and is a new, uncommon take on its type. Instead of the typical Bass / Mids / Treble, it features Low, Mid, and again Mid for entirely new possibilities.

Introduction

Hey there! I’m so excited to share this amazing product with you. This board is like a little piece of magic, taking the revolutionary Darkglass Tone Capsule Bass Preamp and putting all its tonal possibilities and flexibility into a compact, easy-to-assemble PCB.

Our innovative preamp is designed to keep your instrument sounding just as amazing as it always has, but with added options for you to explore and create your own unique sound. Say goodbye to boring traditional Bass-Mid-Treble controls and hello to the exciting world of the Bass Capsule with its Low, Mid, and Mid controls. Plus, the second mid-control can be adjusted to deliver a higher-end spectrum, giving you the clarity and definition of a traditional Treble control without any harshness or noise.

I was hooked from the moment I tried it and I know you will be too. I can’t wait for you to experience this unique preamp for yourself!

Controls

Potentiometers

• HIMID
• LOW
• LOWMID

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

Bass Capsule – Building Docs

Bass Capsule – Drilling template