Posted 20 hours ago

Nobsound Mini Bluetooth Power Amplifier Stereo Hi-Fi Digital Amp 2.0 Channel 50W×2 with AUX/USB/Bluetooth Input Wireless Audio Receiver PC Sound Card with Power Supply (Black)

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About this deal

There was reported that Russian tubes sound much better, and the tubes with golden grids make the best sound. Me and others were not so lucky, I can only conclude there is very little quality checking on these. A circuit diagram is very difficult to draw, because the circuit is on both sides of the board and the details are too small. Filterless Class-D amps for the above reasons are usually only used in amplifiers of less than 5 Watts and also designs where the amplifier is mounted directly onto the speaker to avoid EMI issues. New: A brand-new, unused, unopened and undamaged item in original retail packaging (where packaging .

Vintage amplifiers usually have more “fun” in the sound, mainly due to far from flat frequency response and THD levels. I would not recommend this product if you want to keep your speakers safe and avoid having massive EMI issues. Desire to learn and share knowledge of science required as is 20 years of participation in forums (not all true). Where does the signal on the cathode 6n1p and on the cathode and anode 6p15p comes from, if the signal comes on the 6n1p grid only when tubes are removed?As such I would bet this amp does not meet the FCC Part rules section 15B which is a requirement by law and as such most likely is even illegal to distribute in the US.

There is general consensus in the audio world which of the pins are assigned to a signal as used by HIFIMAN for instance.StereoNET (Australia) is part of an international network of publications owned wholly by Sound Media Group (Australia).

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