smart AVC preamplifier with remote


SOLD OUT! Treat yourself to a smart icOn preamplifier with $700 – $1.500 off. Don’t miss this fantastic opportunity!



smart AVC preamplifier with remote


SOLD OUT! Treat yourself to a smart icOn preamplifier with $700 – $1.500 off. Don’t miss this fantastic opportunity!


icOn passive preamplifier is

  • a passive magnetic preamplifier (AVC) built around Dave Slagle’s world-class autoformers
  • without colouration, noise or distortion, but has unrivalled transparency enabling you to enjoy the original recording to the full
  • fully controllable from your listening position with an easy to use Apple remote
  • capable of unlimited life of noise-free switching on account of using FET switches instead of rotary switches or reed relays
  • adjustable in 1 dB volume steps, which allows a smooth control of volume having a range of 75 dB with 68 steps
  • unbalanced and “true” balanced (with 2 pair autoformers) models with flexible input/output configurations
  • highly functional with balance, mute, optional AV bypass, display with night mode providing control at your fingertips
  • the most versatile and future-proof passive preamp family on the market with customizable features through firmware upgrades
  • contemporary design with clean, sleek lines in a minimalist enclosure with high WAF
  • highly innovative with unique features seldom found in passive preamplifiers regardless of price
  • designed and built in the UK

As seen in

icon hifi critic audio excellence
“As far as sheer sonic excellence, maturity and completeness go, it sits as high as my reference linestage that now sells for roughly £17’000 before VAT and is the best one I know, okay? That’s why if you’re in the market for a preamp and don’t intend to purposely inject chunky syrupy flavor into your system, auditioning icOn 4PRO prior to anything else is my best advice.”
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“Today’s award wrote itself… One this good and flexible is simply more globally relevant than many will have thought. Being priced fairly and built to a high standard makes it a true standout.”
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icon hifi critic audio excellence

“Now with refined system design, excellent ergonomics and improved sound quality, the remote controlled icOn4 is a no-brainer for overall value.”
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*icOn4 is the previous model


People don’t just buy what they need. They buy what they want. which needn’t be the same. Case in point? Active preamps. Most modern digital sources will drive most modern amplifiers to full output. No extra gain is required, just signal cut/attenuation plus sure selection. What do active preamps do in this context? Look at it this way. 2+8 -9=1. Two is your source signal voltage. One is the signal strength needed to play at your desired loudness. Adding more gain symbolized by eight only to knock it down by nine is wasteful. A passive simplifies the math. 2-1=1. It’s pure signal cut, no boost. At the very least it’s more efficient so greener. It also should incur fewer losses from less signal manipulation and produce less noise and distortion.

Srajan Ebaen

icOn 4PRO passive preamp
passive preamp

How does it work?

icOn uses a high  performance microprocessor, sophisticated firmware to control not only the basic features like volume, source selection, but also balance, instant mute. AV BYPASS, night mode, sleep, etc..

These features are simply missing from other passive transformer based preamps, meaning icOn 4PRO has a much higher level of versatility from the comfort of your armchair.

For volume level adjustment, icOn uses high-quality FET switches to select the autoformer taps, ensuring contact error and noise-free operation, which conventional rotary switches are prone to.

Furthermore by the use of these FET switches the signal path is kept remarkably short, thus reducing possible interference to a minimum.  This compares to the more common rats nest found in many TVC/AVC passives which can be prone to interference pickup.

Most people find that the autoformer volume control sounds significantly better than even the best potentiometer or stepped attenuator. And it’s not a subtle difference; most people report that the autoformer has such an open, effortless sound that they would not consider going back to a resistive device.

Most frequently asked questions

How long does it take to burn in my new icOn preamp?



If you ask me about the icOn’s burn (break) in time I would say: that for my icOn preamps there is no burn-in time. The copper wire and magnetic cores don’t change in short term (within a few years). But a lot of icOn customers stated that they have experienced improvement after approx. 100 hours of music listening. My understanding and experience are that this improvement happens in the listener’s brain and not inside the preamp. The autoformers produce quite a different sound than the resistive passive attenuators or active preamps. Our brain “learns” this new sound experience, and adapts to the complete lack of background noise and distortion, the higher transparency. Some audiophile calls this adaptation as the “burn-in”. I’m an engineer and music lover too but like to stick with the scientific and engineering facts. Maybe I’m wrong with the science, who knows? So as usually – YMMV … your mileage may vary 🙂

I did read a review where a different wall wart was used with the icOn and there was a slight improvement despite the passive sound path. Can I make my icOn even better with a LPS (linear power supply)?


Linear power supply

Sorry, but a linear power supply doesn’t improve the sound of an icOn 4PRO. The icOn’s external wall wart power supply doesn’t have a direct connection with the signal path – because that is a passive circuit – and is galvanically separated from the icOn’s inner power supply circuits. The light of the display and the microprocessor’s operations can’t sense any difference between an smps and a linear power supply.

The problem with an smps in general in the audiophile community is the “generalisation”. Yes, 20-30 years ago it was absolutely true that in most cases the linear power supply was better. Today this is simply not true. Today there are amazing high-frequency switching devices, and new circuits which offer better result than a traditional 50-60Hz linear power supply. Audiophiles don’t have proper measuring equipment, A/B testing gears to hear and see the reality. And the “maybe I can hear a difference” bias is based on the outdated knowledge of “self-made experts” without any technical background.

Some facts which are never considered by the power supply “experts”:
1. If the switching frequency is 100 – 1000x higher, filtering and suppressing the noises is much much easier. (50kHz – 1MHz instead of 50 or 60Hz).
2. The noise and EMF from an smps are proportional to the current used. There is a huge difference between an smps of a power amp and the low current smps which I use.
3. Today’s digital audio electronics are full of small smps’, hidden from the audiophiles’ “critical eyes”, embedded on the pcb. They don’t know about them, they have no problem with them. But my “poor” wall wart is very obvious and immediately it is “suspicious”.
There are dozens of other factors which aren’t considered by audiophiles. My absolutely honest opinion: my smps solution isn’t worse than a pure linear power supply.

But I hear my audiophile friends, that some of them prefer something more “substantial” than a small wall wart ps. My new optional icOn power supply (expected around autumn 2022) will be a “hybrid” – like some other very popular audiophile power supplies – combining the best advantages of both the linear and switching power supplies.

The icOn models

The long-awaited NEW icOn 5 is now available for order.
Learn more…

The expected delivery time is approx. 1-2 weeks. Prices don’t include VAT on our website. We charge 20% VAT for UK customers. The buyers outside of the UK might have to pay VAT alongside any applicable customs fees or duties at the point of import.

You can choose between USD, GBP and EUR prices on the product page.