NAT Plasma R

Jeff Dorgay – Tone Publication 2009:

"An excellent value. I enjoyed my time with the Plasma R and feel it offers a very substantial helping of “8-10 thousand dollar preamplifier sound” with a much more reasonable pricetag. For 90 percent of the audiophiles out there, this could easily be your last preamplifier."

Les hele testen; her

Anthony Nicosia - SA Equipment September 2009:

"This has been a fun review as the NAT Audio Plasma R tube preamplifier has allowed me a greater glimpse into the world of high end audio and my own musical collection. On some songs it drew me into the music a few more steps then I had previously experienced while with others it showed a layering of the performance that was previously hidden from view."

Les hele testen; her.

Phillip Holmes – dagogo.com:

"The Plasma R is a well built preamp, using affordable tubes, and should last a long time. Even if it is outside your budget, I’d try to audition it anyway. In most important ways, the Plasma R is very musical while remaining accurate. Tonal balance is slightly warm and forgiving. In the areas of dynamics and imaging, it is extremely competitive with more expensive units. I heard nothing that took away from the enjoyment of music. Without reservation, I can recommend an audition if you are in the market for a linestage."

Les hele testen; her

(norsk info kommer)

NAT standard model Plasma Dual Mono Line Stage moves to R-remote extension after seven years of producing. There are two high current 6N30P-DR tubes per channel build zero feedback line stage. This concept results in lower output impedance, to control all types of interconnect cables( for driving of power amplifier ).

Ten(10) tubes works in perfect simmetry means five(5) per each channel.

Power supply combine vacuum tube rectification and double regulated stabilization realized with stabilotron tubes (plasma effect) and the last generation of solid state. Plasma power supply has very low and constant output impedance through a very wide frequency response.

Sound quality is totally independent against power supply instability, because all stages in preamplifier contain stabilisation.

Plasma Dual Mono Line Stage has superior sound characteristics.

Design Features

- full dual mono construction with 10 tubes(5 for each channel)
- zero feedback design
- all triode pure class A configuration
- double regulated, hybrid output high precision power supply
- high current super tube 6N30P-DR double triode (military grade), long life over 10 000 hours

- plasma effect are used for stabilization in power supply realized with OD 3 tube (new old stock)
- vacuum tube power supply rectification with EZ80 tube
- all polypropylene capacitors in power supply
- two low density silent transformers custom made for NAT
- soft start operate

- infrared remote control made from solid block of aluminum
- hard wired in power supply
- gold plated teflon insulated RCA jacks
- hand assembled all aluminum modulated chassis
- extensively used computer numeric control machines (CNC)