“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
“ Here is my personal review of HPBA-2S fully implemented by Qes Labs. But first I want to point out some things. -I come from the world of professional audio.I don't consider myself an audiophile in the true sense. I have always tried and continue to seek the maximum of transparency and neutrality coming off my sources. I did audio mastering for some years so you can imagine what kind of...” --fradoca
“ ****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
“ It really falls in between a portable and a desktop amp. Sounds excellent. A bit heavy, but a very solid build. A handy mini-usb input connects directly to my laptop without installing any driver. Tested with an Accuphase CP800 cd player, Beyerdynamic DT-880 and AKG K-271 studio. Sound is revealing, detail retreiving is impressive. Stravinsky's Royal March reveals an optimal soundstage...” --TheHighBuilder
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...