Eurorack Module

Pre

Low Noise Preamp for Microphones and Pickups

The Pre module allowes the embedding of signals from electro dynamic sound sources such as microphones or pickups (e.g. e-guitars) in modular synthesizer equipment. Its high amplification together with a very low noise floor allows the processing of even very low input signals (such as from dynamic microphones). The module is equipped with a ‚Sensitivity‘ knob to adapt it to different input levels, coming from different pickups or microphones. A red LED indicates when the level is overdriven, causing the signal to become saturated; here the preamp soft clips the signal. Additionally, a trimmer on the back of the module allowes the setting of the max. output gain – between 3Vpp and 18Vpp. Further, there is a jumper to optionally supply an electret microphone with +12V power supply, provided on the middle ring of a 3-pole jack.

 

Pre Banana Version

Banana
Pre Minijack Version

Minijack
  • Very low noise
  • Adjustable input sensitivity
  • Soft clipping behaviour with red indicator LED
  • Output gain trimmer (max. output signal ca 18Vpp)
  • Optional +12V power supply for electret microphones
  • Available with banana or 3,5mm minijacks
  • Eurorack module
  • Width: 5 HP
  • Dimensions: 128,5 mm x 25,2 mm
  • Depth: 40mm
  • Supply voltage: ±12V
  • Current consumption (postive rail, without load): ≈10mA

Documentation

PDF Download

Documentation title

Pre minijack drawing

Panel
Pre minijack side view right

Side view right
Pre MJ front view

Front view
Pre minijack side veiw left I

Side view left I
Pre minijack side view left

Side view left II