RPX-308 currently not available

*(Quad Mono is RudiStor trademark and means Dual-mono Balanced made by four Single Ended Amplifiers)

RPX308 is the latest development of the lucky RPX300 family. More refined, more "top level", and even more compact (5 cm less deep).

RPX-308 is a pure Class A amplifier, working both in balanced or unbalanced mode either in input and output, or in any combination of them. The high current output, the absolute zero negative feedback (local or global) and the great capability of controlling the transducers make RPX-308 produce an astonishing transparent and dynamic sound.

The power supply is completely new, based on a high current switching unit that totally separates the amplifier from the noises of the power line, it is followed by 2 RC filters in order to make the current as clean as possible and with a reserve of back up power more than enough to support the most terrible transients. The result is a great control of transducers (any type, no matter of impedance) and great dynamics joined with transparent sound. The absence of any negative feed-back circuitry eliminates from sound all those artefacts in the highs that are common to many solid state amplifiers. The sound is round, deep, dynamic and absolutely natural either in balanced or unbalanced mode.

Like all our top productions, "the RPX-308" uses only discrete components.

It is well known that a headphone amplifier is always a great preamp for power unit driving speakers, as well as for amplified boxes, so a top unit like the RPX-308 MKII becomes an unbeatable preamplifier. This is not a standard option but can be implemented on customer request.

Due to the high output current, and the great damping factor it can drive in the same way headphones of any impedance do. More than one headphone can be connected at the same time.

RPX 308 Operative modes

• Balanced Input to Single Ended Output
• Balanced Input to Balanced Output (full Balanced mode)
• Unbalanced Input to Balanced Output (through an internal phase splitter)
• Unbalanced Input to unbalanced Output (traditional SE dualmono amplifier)

RPX-308 VIDEO

Headphone Outputs

• Balanced left and right
• 2 x 6.4mm jack (unbalanced out)
• All the output can be used at the same time

Preamplifier output ( optional +250 US$ )

• Balanced Out XLR
• Unbalanced Out R-L RCA

Two sets of input (balanced and unbalanced) output can be controlled by volume knob to use as a preamplifier (option).

The RPX-308 is a result of the research done at RudiStor R&D labs, uses only discrete components from the time when RPX-300 used four independent high current power amplifiers based on bipolar transistors, and is a pure quad mono amplifier. The amplification units work two per channel, with splitted power supply, again ....it has zero negative feedback. Some real, no compromise solutions.

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