DIY Eurorack Builds

Summer

Dual 4-input summing mixer ยท Isaac Beers

MakerIsaac Beers
TypeDual 4-input summing mixer
MountingMixed
Width4 HP
LicenseProprietary (No licence published)
Difficulty ๐Ÿ”ฅ SMD (0805)
Summer module
Photo: synthCube

Knobless dual summer. Two identical circuits mix audio or CV, each with four inputs at fixed 0.5x gain and right inputs normalled to the left so a single patch gives unity. Mult cables let you reach 1.5x or 2x. Dual parallel outputs per section. 0805 SMD with through-hole panel parts. Around 45 to 65 USD.

This is a third-party open-source design, listed here as a build reference. Specs are researched from public sources; check the source repo and store for the current BOM, panel, and revision before ordering parts. Corrections welcome.

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