Befaco FX Boy DIY Kit
Best rewarding project for DIY audio enthusiasts.
The Befaco FX Boy is a versatile multi-effects module for Eurorack systems, inspired by the concept of game cartridges. It features CV control over all parameters, including a built-in, CV-controllable four-band EQ that can be routed pre or post-effect. The module supports hot-swappable cartridges, each designed by a different manufacturer and offering unique effects like fuzz, phaser, flanger, delay, granular synthesis, wave folding, bit crushing, and distortion. This open design allows users to create their own effect cartridges.
$360.00
Owner Satisfaction
4.5
/ 5
Category Rank
202
/ 388
#202 in Speaker Components & Kits
Price vs Category Average
+116%
Above average
Who it's for
- Aspiring electronics hobbyists and modular synth enthusiasts new to DIY
- Sound designers and musicians seeking nostalgic or experimental digital textures
- Modular synth users looking to expand their rack without breaking the bank
Who should skip it
- Novice builders or those without proper tools and electronics assembly skills
- Busy individuals seeking immediate plug-and-play functionality from their modules
- Users who prefer guaranteed working products and minimal technical hassle
Key Specs
CV control over all parameters
CV control over Dry/wet
CV controllable four-band EQ
EQ routable post or pre-effect
Selector for two different flavors of each cart
Hot swap for all carts
Includes breadboard
Features
- Hot-swappable game cart effects
- CV control over all parameters
- Built-in CV controllable 4-band EQ
- Selectable effect flavors per cart
- Open specifications for custom carts
- Designed in collaboration with multiple manufacturers
What customers say
Customers consistently praise the engaging and well documented build experience, finding the instructions clear and the components high quality. Many highlight the satisfaction of completing the kit and the excellent sound character of the resulting effect. The overall consensus points to a rewarding project that delivers a robust and musically useful module, making it a popular choice for those seeking a hands on approach to expanding their setup.
Know before you buy
The kit includes the main module and a breadboard for custom development, but you will need to acquire or build specific effect cartridges to get sound processing. The system is designed to be modular, so you can curate your own collection of effects.
Yes, the FX Boy is an open-design platform. Befaco provides the necessary specifications, allowing you to design and build your own custom cartridges using the included breadboard or your own PCB designs.
The built-in four-band EQ is fully CV-controllable and can be routed either pre-effect or post-effect. This flexibility allows you to either sculpt the incoming signal before it hits the effect or refine the processed output.
Yes, the cartridges are designed to be hot-swapped safely while your system is running. This makes it easy to experiment with different effects during a live performance or a studio session without needing to power down your rack.
Because the platform is open to various manufacturers, the library includes a wide range of processing tools such as fuzz, phaser, flanger, delay, granular synthesis, wave folding, bit crushing, and distortion.
While the kit is well-documented, it does require a moderate level of soldering skill to assemble the main module and the cartridges. If you are new to DIY, ensure you have the proper tools and take your time with the assembly process.
Still have a question?
Ask Hayley anything about this product before you decide.