“Darkvoice 337: Introduction A little background: the Darkvoice 337 uses the 6AS7G dual-triode for its power/output tube which, while definitely delivering that special touch of midrange magic that I personally only experience from tubes, it is a far less syrupy tube than many. In fact, in the better amps, it’s a gutsy, powerful, neutral, very wide range amplification device. It does have a lot...” --Skylab
“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
“ ****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
“ Good tube amp for the price. In EU Woo amps are too expensive, in US I would have bought a Woo most likely. But this amp is very nice! Edit: I upgrade a few parts inside (power resistors and output coupling capacitors) and now I can vouch this amp is world class! Such a pretty sound and power, it is scary good! ” --telecaster
“ I was lucky enough to pick this critter up from the FS/FT forum for a good price (thanks!). After spending a little time with it, I have to say I'm pleased. I've tested it with my Beyer DT770pro/80ohm and Senn HD205. Didn't do much for the Senns, but the Beyers seemed to become tighter and more responsive. It did give the highs a bit of a shrill feeling at loud...” --hdufour
The model uses two imported pentodes EF80 to amplify signal from the left and right channel respectively and tow imported triodes 6080 or 6AS7 with low internal resistance as cathode output of the two channels. The left channel and right channel are supported by different power supply.
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...