“Before listening to this charming little amp, I was very skeptical about overall tube amp idea. But this amp changed my mind greatly. First of all, I have to admit it's design and build quality - it's really great, amp looking very stylish. As for sound, I have to mention, that it's really giving "warmth" to sound. This is hardly explainable by words, but old rock, for example, starts...” --cleg
“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 purchased this tube amp on eBay for 75 dollars in new condition. This is my first tube amp of any kind. The only other headphone amplifier I have owned is the Fiio E5. First of all, I will state the entire listening set up I have that I use with this in order to provide a more solid frame of reference for the review: My turntable is an Audio-Technica LP-120 turntable with...” --professorwiki
“ I got this small amp from a local marketplace. It sounds OK when I got it, too warm, almost no treble. After I got the schematic and tips from google I did some mods with this baby and now it sings! What I did: 1. Cut some traces for crosstalk improvement 2. Make better grounding, measure voltage difference between in and out, make sure its not more than 1mV 3. Change the...” --Jazzyfi
“ ****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
Powerful, synamic and sweet TUBE sound With Electro Harmonix 6922 TUBE Cute and Beautiful looking Pure Class A Tube amp, No op amp IC Low voltage, good safety Powerful for any Headphone Technical Specification: In Put Power DC24V Input Sensitivity 100mV Input Impedance 100KOhm Out-Put Impedance 20~600 Ohm Gain 30dB Frequency response 10Hz-60KHz +/-...
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...