RP8.1 discontinued

Released on June 6, 2011, the RP-8.1 represents the latest update of the RP8 series — the highest level, the state of the art in our research in E-OTL headphone amplifiers. The updated look is paired by a new tuning, making it our best E-OTL ever.

RP-8.1 is a no-compromise device from any point of view. The sound joins the warm signature of tubes with the punch and dynamics given by solid state power output, based on bipolar transistors.

The oversized and overfiltered double (one per channel) power supplies deliver a clean and abundant current, in order to easily manage any power requirement even under the most stressing situations.

Frequency response is almost flat from near 0 Hz up to 100 kHz, and although RP-8.1 does not use any global negative feed-back in the circuitry, it has a totally black background with no hum or hiss at all.

Thanks to the great damping factor and the high output current the RP-8.1 can handle any kind of headphone no matter of impedance or sensitivity.

As a standard feature, the RP-8.1 offers a "pre-out" set of RCA (output controlled by volume knob) making it an extraordinary preamplifier.

The great quality construction meets an accurate selection of components including a special selection of crio-treated selected tubes.

Launch price (2011): US $2,350 with an introductory offer of $1,900. Price in 2013: US $1,900 worldwide / €1,490 in the EU (VAT included).

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