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3-to-1 Precision Adder

Price range: 8,00 € through 55,00 €

Eurorack utility module with two independent precision adder channels (3 inputs → 1 output each). Ideal for combining Control Voltages with zero offset error. Perfect pitch tracking guaranteed. Also works as a straightforward audio mixer. Available as PCB, kit or fully assembled module.

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Description

The 3-to-1 is a DC-coupled precision CV mixer / adder for Eurorack modular synthesizers. Each of the two independent channels sums three input voltages into a single output with no measurable offset: what goes in is exactly what comes out.

Key features

  • 2 independent channels, each with 3 inputs → 1 output
  • Precision DC-coupled signal path, no offset drift
  • Accurate CV addition/subtraction
  • 0.1 % matched resistors in the op-amp feedback loops
  • Per-channel offset trimmer for null calibration
  • Can also be used as a plain audio mixer
  • Standard Eurorack power connector (±12 V)
  • Cliff CL1384 jack connectors

Schematics and documentation.

Additional information

Configuration

PCB, PCB + Front panel, Full kit, Assembled and tested

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