英国/音乐传真 M1HPA 耳机放大器

产品规格：
New from Musical Fidelity is a a four-input upsampling digital to analogue converter, the M1 DAC, and a novel headphone amplifier, the M1 HPA, which has both analogue and USB inputs, and can double as a simple preamplifier.
The DAC goes on sale at around ￡399 early in July, while the headphone amp will follow late in August at ￡499.
The M1 DAC has conventional and balanced electrical digital inputs, an optical digital in and a USB connection, will lock onto any S/PDIF signal at 32kHz, 44.1kHz, 48kHz, 88.2kHz, 96kHz or 192kHz, and can also upsample to 24-bit/192kHz.
It also uses choke filtration on the mains input, and the company says its technical performance is "pretty well as good as any at any price.
"There’s no secret or mystery about this. We use top quality digital components in carefully designed circuit configurations which are subtly implemented on brilliant PCB layouts.
"Looking at the M1 DAC’s total measurements and comparing them to any DAC up to ten times its price you will see that, on balance, the M1 DAC is equal to or better than any."
The company is similarly bullish about its M1 HPA pure Class A headphone amplifier, which has line and USB inputs, loop-out stereo output, a variable line output and two headphone sockets.
It says that "Distortion is incredibly low (less than .0005% across the band) frequency response is ruler flat. Noise ratio is outstanding, and extraordinary low output impedance means that it can drive any headphone with complete linearity and low distortion."
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