Bastl Instruments

Quad line output & headphones amp

High quality line outputs for your modular in compact format.*

With line level clipping indication which is handy for both recording and live performances.

Headphone output can be quickly switched allowing you to listen to one of the stereo channels.

Ciao! is also great for jamming because you can separately create a sound on your headphones and then flip a switch to mix it into the final mix directly with this module.

*Please note: This module's PCB is 113,5 mm long. Check the space between your rails to make sure the module fits your system. It cannot be fitted into some particular eurorack cases!

See the product page for instructions/downloadable content.

- More details in the Description below. -

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  • total 4 line outputs
  • 2 balanced outputs (left and right)
  • 1 stereo output (can be used as second headphone output in emergency)
  • headphone output
  • switch to select what plays in the headphones
  • switch to mix channel A to channel B
  • internal normalisation allowing mono to stereo conversion
  • line level clipping indication per channel
  • volume control per stereo channel


  • 5HP width
  • PTC fuse and diode protected 10pin power connector
  • 35mm deep 
  • current consumption: +12V: <40mA, -12V: <40 mA
  • the PCB is 113,5 mm long! It cannot be fitted into some particular eurorack cases!


See the product page for instructions/downloadable content.


Data sheet


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