Tom Evans Audio Design

Lithos: So what the hell is it and why do I need it?


When we invented the Lithos circuit, we always knew that it was a ground breaking event, but it has gone on from strength to strength and the latest versions are now cutting edge designs that offer unparalleled effectiveness.

We have two main types of Lithos circuit, the Lithos 7.4 Local Regulator Circuit and the Lithos 6.1 High Current Regulator Circuit.

Lithos 7.4 is a local regulator circuit which is predominantly used in the power regulation of a gain stage. Look at it as regulating the fuel that your exotic supercar runs on. You wouldn't buy a Lamborghini and run it on paint cleaner! Many people believe that a Battery is a great way to run a phono stage because it generates little noise since it doesn't have to use A/C voltage to produce the D/C that the components need. To some degree this is true, but because of the effectiveness of a Lithos 7.4 regulator circuit, you would need to have a battery the size of a small room to get the same rock solid effect.

Each Lithos circuit contains over 50 hand selected and individually measured ultra high grade components.

The Lithos virtually eliminates the power supply noise (don't believe manufacturers hype when they say their power supplies have been developed to produce no noise -
ALL power supplies produce noise) that is inherent in the basic design of power supplies, by reducing the noise floor into the Nanovolt domain. The further this noise floor is reduced, the more resolution and Dynamic range the components have to work with. The idea is to push the noise floor down below the level of the quietest piece of information on the recording. Many circuits in other designs have a noise floor that exceeds relatively audible information from a recording.

As an example, an Original Groove Anniversary featuring our older Lithos version 7.3 was tested in a well known German magazine and they were startled to find it had a signal to noise (dynamic range) of 108dB. To put this into perspective, you will find it almost impossible to find any other phono stage in the World with a signal to noise ratio of even 100dB (dynamic range) at a 20kHz bandwidth at
any price.

Our newer Lithos version 7.4 has further improved on this figure by reducing this by +/- 18 db in a 20kHz bandwidth! The outcome of this has revealed far more micro-dynamic details in the recordings we know and love. Truly the ability to hear things from a recording that no other Hi-Fi Component in the World can allow through.

Great, I finally understand what a Lithos circuit is and I definitely want it in my Hi-Fi components, however, why are there two types?

Lithos 6.1 is a High Current Regulator. This means it supplies circuits that use multiple local Lithos 7.4 in them, even further reducing the operating noise floor.