RP8K-VT currently not available

This is something really new, although as an E-OTL it takes advantage of our long experience in this kind of design topology, starting from the 2005 made RP4 up to now.

In the years many things are changed and we refined our design, this time we also made some

Really innovative solutions without going far from our tradition.

And for what we believe to be the best E-OTL you can dream, we have designed the best possible case.

A minimalist look made from a single block of aluminum CNC engraved make the case a solid and fascinating unibody, with many advantages not only from look but even in general quality mechanical and electronics. No vibrations, heavy shield from external EM interference and great heating dissipation, are some of them. When assembled the RP8K-VT is like a solid metal brick.

From the VT input stage to power SS there are no coupling capacitor, this eliminates a contaminating component, and assures a transfer of signal in the best and less contaminated way. IF we consider the direct coupling plus the total absence of negative feed-back (a circuital solution that makes easy the design and tuning but introduces negative effects like artifacts and impurity at medium to high frequencies) then you can understand our great attention to sound quality.

How a relatively simple electronic circuit, like in 8K, we were able to obtain such great performances?

Simple: we try to make always the circuits as simple as possible near to the theoretical ideal circuit design. Less manipulation to sound, and better is the result. This in the real world is not always simple to obtain and the manufacturers prefer to adopt solutions (like feed back or coupling capacitors between stages) that make life simple.

Our solution is : to make the circuit as simple as possible, and reach the high performance by an accurate design and an obsessive selection of components.

The SS power stage, directly coupled to input stage is the power stage (called also current stage) this stage gives current to the output and has not to interfere to the sound quality. We adopted a Bipolar Transistor in current mirror solution. This is totally transparent to sound quality but gives to the signal a great current. This makes possible to couple to 8K any load from 8 to infinite Ohm. Having a great current at output means more solid basses, great punch, and great dynamics.

What was our goal? To design and make an amplifier with all the great features of vacuum tube amplifiers joined to a high current SS output, in order to have great transparency, silk mid-highs, solid deep and energetic basses. All this enclosed in a luxury look box made by a single engraved brick of avio aluminum. The result is the RP8K-VT.

This product is made in Europe in respect of CE regulations by professionals and qualified laboratories under supervision of RudiStor R&D LABS