icOn 4PRO balanced preamp

£3,799 ex. VAT

Passive preamp with 4 different input/output configurations are possible with input and output selector, truly balanced with 2 pairs of autoformers, 120mm high enclosure (W 134mm x L 260mm) The input signal should be differential balanced with ground reference. The “floating” balanced signal (from an output transformer) can be handled as single-ended only.


After receiving your order we will confirm the expected delivery date and send you a proforma invoice for a 50% deposit, please read the T&C for more information. Please do not ask us to undervalue customs declarations. Customs duties and VAT are governmental taxes and not paying them is actually committing fraud and against the law. We won’t risk being sued for tax evasion. Thank you for your kind understanding. If you have any questions or need more details please contact us.


  • Volume positions: 68
  • Volume range: 75 dB, from +3dB to -72 dB
  • Max. input level: 8V RMS single-ended / 16 V RMS differential balanced
  • Volume step size: 58 x 1 dB and 9 x 2 dB steps (the 2 dB steps are scattered at low volumes)
  • IR remote control: with Apple remote
  • optical encoder and touch button for the manual operations
  • true balanced with 2 pair autoformers
  • balance, mute and stand-by mode
  • AV pass-through as an option
  • LED display with 2 brightness and night mode
  • FET switches for the autoformer taps' selection
  • Dave Slagle autoformers
  • remote-controlled output selector
  • 3 different input / output configuration:
    - 2 XLR IN / 2 XLR OUT (without output selector)
    - 4 XLR IN / 1 XLR OUT
    - 3 XLR IN / 2 XLR OUT

Shipping cost:
United Kingdom: £50
Europe: £100
United States: £120
Rest of the world: £150

What others say

“The first listen gave me a pleasant smile. The audio comes through liquid, smooth and airy. I can just say, that I can retrace everything that I have read in the web about the icOn. Congratulations for creating such an outstanding device.”