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Mediator Step-up Transformer

(3 customer reviews)

 1.219,01 ( 1.475,00)

The Mediator is a plug & play step-up transformer. The Mediator transformers are fully custom built. After a lot of listening and testing we have designed a fantastic sounding step up transformer. The housing is completely CNC machined from a single piece. The transformers are decoupled and encapsulated in a special resin. This ensures optimal decoupling and a low resonance. The RCA cinch connectors are high quality ETI SF-08 connectors. The signal pin of the ETI FS-08 is milled from one piece of 99.99% pure silver (IACS 105). The connector and also the return pin are milled from a single piece of specially treated ultra-pure copper (IACS 102) and then silver-plated.

The Mediator sounds sparkling, has a beautiful midrange with lots of detail and space. In short, we think the Mediator is one of the best step-up transformers available on the market.
Note: this is a custom made product. It is made to order and therefore we cannot accept returns. Lead time is 1 week from order.

The mediator is available in three versions:

Mediator 20
Step-up ratio = 1:20 with a gain of 27 DB.
The Mediator 20 is suitable for cartridges with an output voltage up to 0.35 mV.
Like an Ortofon SPU Classic.

Mediator 10

Step-up ratio = 1:10 with a gain of 20 dB.
The Mediator 10 is suitable for cartridges with an output voltage of 0.35 mV up to about 0,8 mV.

Mediator 5

Step-up ratio = 1:5 with a gain of 14 dB.
The Mediator 5 is suitable for cartridges with an output voltage of 0,8 mV to 1 mV.
Like some EMT cartridges.

How to calculate the Step-up gain for MC cartridges.
The gain of a step-up is specified in dBs. When you multiply the gain of the step-up with the output voltage of your element, you have the gain at the Phono amplifier. For most elements up to 0.35 mVolt output voltage you need a step-up ratio of 1:20 (27 dB). Above 0.35 mVolt a step-up ratio of 1:10 (20 dB) is recommended.


Step-up ratio

Gain (dB)

Mediator 5



Mediator 10



Mediator 20



Ortofon ST-7



Mediator specification:

  • Frequency respons: 10 Hz. - 80 kHz./ -1 dB.
  • T.H.D. 20 Hz.: < 0.006%
  • High Permeability Nickel Core
  • Double Shielded and decoupled
  • Dimension: 140 x 85 x 90 mm.
  • Weight: 985 g.

3 reviews for Mediator Step-up Transformer

  1. Kashef

    One word: Enchanting!
    When I unpacked the red jewelry box and connected it to my system, I was ill prepared for the shock – and awe – of a lifetime. In duet with my Shindo Giscours preamplifier, which is in a much, much higher price bracket, the pair sang more beautifully than any choral work and presented music in a full-bodied way than did Ben Webster when he ‘met’ Gerry Mulligan. Your creation is, it would seem, now the most important link in the chain of my arguably ‘high-end’ system. And all of this for a price which can only arise out of a philosophy and not a marketing strategy. You have indeed reached out to the mass with a true ‘audiophile’ component, a jewel of a product Für Das Volk.

  2. Frank Koevoets

    Great Transformer! I makes my SPU meister MKII sing ! It beats the triple priced Ortofon ST80 in musical performance with an SPU. Highly recommended!

  3. marcel

    Dat kleine dingen tot grote prestaties in staat zijn was al bekend, dit is er ook één.
    Toen ik het kleine juwelendoosje binnen kreeg, zag ik al dat de afwerking prachtig en vakkundig is. na de plaatsing in mijn systeem, kan het inspelen beginnen.
    Inspelen is echt nodig, en vrij lang, 50 a 60+ uur, in tegenstelling tot sommige apparatuur, neemt de mediator geen “stapjes”, maar gaat heeeel geleidelijk steeds mooier klinken, na 20 uur merk ik dat hij steeds gedetailleerde en vloeiender gaat spelen, richting de vijftig uur wordt hij echt briljant, WOW!!, dit is echt een bijzondere SUT.
    Ik kan hem aanraden voor elk systeem, SUPER!!

    It was already known that small things are capable of great achievements, this is one of them.
    When I received the small jewelry box, I could already see that the finish is beautiful and professional. after the placement in my system, the break-in can start.
    break-in is really necessary, and quite long, 50 to 60+ hours, unlike some equipment, the mediator does not take “steps”, but gradually starts to sound more and more beautiful, after 20 hours I notice that he is playing more and more detailed and smoother , towards fifty hours it becomes really brilliant, WOW!!, this is a really special SUT.
    I can recommend him for any system, SUPER!!

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