Chaos Custom Shop is a Polish boutique effects builder based in Lgota Mokrzesz, hand-assembling guitar and bass pedals with a focus on customization. The shop is known for replicas and modified takes on classic circuits — Tube Screamer, Klon, Bluesbreaker, Rat, and King of Tone among them — alongside its own designs spanning overdrives, fuzz, equalizers, compressors, and utility tools. A signature offering is fully personalized graphics: customers can specify a band logo, signature, photo, or custom artwork on the front panel of an order.

The lineup leans heavily toward bass-oriented and pedalboard-utility tools. Notable products include the Twin Drive Bass+ (a two-mode bass overdrive with blend, boost footswitch, and switchable clipping), the HPF High Pass Filter, the Sub Sonic Filter, the Big Blender, the Bass Equalizer, and the Terminal X5 patch box. The brand sells primarily through its own webshop at chaos-fx.pl and a Reverb storefront, shipping handmade builds across Europe.

Within the Polish boutique pedal scene — alongside builders like Hexe, Taurus, Sitek, and G-Lab — Chaos Custom Shop occupies a niche as an affordable custom-order specialist rather than a mass-production brand, with each unit assembled to order.

Chaos Custom Shop has 2 products cataloged on Equipboard, including Switch Effects Pedals and Effects Pedal Accessories.