“This review is based on matching the Mini X with Hifiman He-500 Headphones. You may be reading this review, unsure what to make of this Amp, asking how can a cheap sub $200 amp offer the power needed for an expensive Headphone such as the Hifiman He-500? If you have done your homework you will find this is the stereo amp everybody is...” --fluidz
UPA-200 represents a true breakthrough in audiophile-quality amplification. At last, a truly affordable stereo power amplifier that can satisfy the most discerning aficionado, and at the same, is affordable to anyone with a desire for real quality. Our advanced engineering and design techniques have resulted in an amazing new amplifier. Its rock solid performance and affordable price point...
Basic parameters: Size:185*155*65mm Input voltage:AC110V or AC220V avaialbe Applicable to the headphone impedance: 32 ohm -600 ohm Frequency Response: 20HZ-20KHZ This amp using Original BD139 BD140 This is a assembled and tested amp. package include: finished A1 headphone amp X 1