Heed Audio Thesis Lambda Pre-Amplifier

  • The Thesis λ (lambda) is a preamplifier for the analogue-blooded fans. You can choose between five of your analog sources and adjust the volume with an RC handset, but that is all you can get from the digital world by this clean-cut preamp. On the analogue side, however, it is the most refined preamplifier ever built by Heed.

    The amplifier circuit of the Thesis λ is the pure version of the Thesis α’s analogue section. With the lack of digital circuitry, there is no reason to compromise anything. Aiming for the best possible sound quality, the Thesis λ offers an unexceptional PCB design, unique to our Thesis line preamplifiers.

    In a standalone mode, it is a very robust and capable device with its sturdy internal power supply. There is, however, an option to upgrade this remarkable performance to an even more astonishing level. The Thesis π external power supply adds more clarity, more accuracy and a great bunch of smoothness to the presentation.


    • 5 analog inputs
    • upgradeable analogue power supply (see Thesis Pi)
    • fully remote controllable
  • Inputs: 5x analog
    Outputs: 1x preamplifier output / 1x tape out
    Power supply options: internal / Thesis Pi
    Max. consumption: 60 W
    Dimensions (WxHxD): 22 x 8.5 x 36 cm

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