RP-9 currently not available

The RP-9 is the latest and probably the last design on the base of RP6-RP7 and RP8 family of products; step by step we believed to have reached the top and the highest level this kind of amplifier can offer. Right now it is 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 of ever. RP9 it's a no-compromise device from any point of view. The sound matches the warm signature of tubes with the punch and dynamics given by solid state power output based on bipolar transistors. The improvement over the RP8 (apart the evident look):

• Improved power supply for even cleaner sound
• Improved heating management that now is more dissipated by the side wall instead of the cover
• 3 mm aluminum cover with engraved logo and windows to admire the illuminated internal and give a contribution to overall cooling.
• The amplifier as any A Class becomes warm but never really hot.
• New larger and more absorbing foots

Frequency response is almost flat from near to 0 Hz up to 100 kHz, and although RP-9 do 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-9 can handle any kind of headphone no matter of impedance or sensitivity.

The RP9 has two outputs having the same level of volume autoadjusting in base of sensitivity and impedance on headphone. So no problem in any matching of the headphone.

As a standard feature, the RP-9 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 cryo-treated selected tubes.

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