Report that Chinese manufacturer Nobsound's tube amp was a complete fraudulent product
A user who purchased the tube amp 'MS-10D MKII' sold by the Chinese-based audio maker 'Nobsound' reports that it was an empty and inferior product.
Exposure of fake Chinese tube amplifier Nobsound MS-10D MKII. --Stereo Amplifiers & Pre-Amps --StereoNET International
Exposure of a fake Chinese tube amplifier Nobsound MS-10D MKII --YouTube
When Mr. Oleg Grounine who purchased the MS-10D MKII disassembled the product, an empty box was installed on the amplifier so that it looked like a real amplifier. The box should have contained three transformers, one for the power supply and one for the channel that connects the speaker to the vacuum tube, but only one was included.
When Mr. Grounine confirmed using an oscilloscope etc., it was confirmed that the signal did not change even through the amplifier and was transmitted to the vacuum tube, but it is a complete mystery what kind of route to follow. Grounine reports that the circuits on the product are also difficult to see and very difficult to reproduce.
Amazon | [TYSJ] Nobsound? MS-10D MKII Power Amplifier / Headphone Amplifier Stereo / Preamplifier / Vacuum Tube Amplifier Bluetooth / USB / Headphone Compatible | Nobsound | Power Amplifier
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in Hardware, Posted by log1p_kr