Sputnik Modular Preamp/EF

Eurorack Module EF / Preamp from Sputnik Modular

Preamp and Envelope Follower

http://sputnik-modular.com/efpreamp/
Specs
  • 110 mA +12V
  • 20 mA -12V
  • 28 mm Depth
8 HP Envelope FollowerExternalPreAmp
Module Detail Page
User left

What's the impedance of the preamp input? I found nothing on the webpage and in the manual.