“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
“I've had this since 2009. It is a very nice and versatile amplifier. I use it almost every night before going to bed or sleep. I bought many accessories, the rechargeable battery and charger, plus the more expensive IC upgrade. It has a very nice stereo quality and is powerful enough to drive power hungry headphones. This portable amplifier has quenched any thirst in me for other ampfliers. I...” --vhbaske
“ ****Note**** As always, these are strictly my opinions. I try to present these products as honestly as possible and try to describe them as best as possible. As always, YMMV. ****NOTE**** FISCHER AUDIO MYSTIFY PORTABLE HEADPHONE AMP SPEC’S: Frequency “flatness”: +/- 0.5db Dynamic Range: 110 db Total Harmonic Distortion: 0.001% Intermodulation...” --LFF
“ My first review! I'm a bit of a newb, so please take what I say with a grain of salt! The Great: -This little amp is positively packed with features--and you'll use them all. Even the ones that you think you won't, like the 'flashlight' mode, or the 75 Ω button. (Makes for a great way to quickly lower the volume if someone is talking to you.) -It's got some...” --metalsonata
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...
Frequency range: 10Hz-20kHz Amplitude-frequency responce (AFR) irregularity within the frequency range: 0.3 dB Dynamic range: 110 dB Harmonic distortions: 0.002 % Intermodulation distortion (CCIF) 0.006 % Interpenetration of channels at frequency 1 kHz: -73dB Rated input voltage: 0.5 Maximalinput voltage: 3.5 V Maximal output voltage at the non loaded output: 10 V Maximal undistorted power...