Musical Fidelity M1HPA P Reinvents the Headphone Amplifier A Stereophile Class-A Rated Component Almost twenty years ago, Musical Fidelity defined the headphone amplifier category with the original X-Can. A super-sweet tube design, the original X-Can was affordable, upgradeable and most importantly made music fun to listen to. Fast forward to the 21st century and Musical Fidelity has finally unleashed the most potent headphone amplifier they"ve ever made, the M1HPA. a choke-regulated internal power supply and the new gorgeous monolithic chassis style which Musical Fidelity first introduced with their pure Class-A AMS series. "The M1HPA sounded exquisitely and addictively detailed with grab-ass bass and astonishing purity of tone. Sam Tellig"s reference!" - Sam Tellig, Stereophile, Class A rated Component Class-A Design A pure Class-A amplifier, the M1 Headphone Amplifier is quite a big step up from even Musical Fidelity"s more recent offerings. An entirely new circuit, the M1 HPA is far more transparent, more resolved and much more powerful. The M1 HPA is also smoother through the midrange and treble with an overall more refined presentation. Bass, a long-time MuFi strength, is now at a new level of power and control. "Unrestrained and raucous, yet at the same time it was detailed and full of texture. Given its sound, the M1 HPA is a bargain of a preamp." - HiFi News Low Output Impedance The M1HPA"s output impedance is very low at less than 1 Ohm. This is critical as it allows the M1HPA to be impervious to headphone selection. A low output impedance means the amplifier is more capable of driving difficult loads with ease. The M1HPA"s powerful amplifier section delivers gobs of current into any impedance, making it capable of driving virtually any headphone. USB Input The M1DAC features a B-style USB input, which accepts sample rates up to 48kHz. Like all other digital signals, the M1DAC upsamples all incoming USB sig