The amp and speaker combination works really well with jazz/folk/accoustic music but can get a bit muddled with complex music like rock or orchestral music. They could have very easily been honest and up front with this product, and they would have been successful. Most purchases from business sellers are protected by the Consumer Contract Regulations 2013 which give you the right to cancel the purchase within 14 days after the day you receive the item.

I put the tubes back and then I found exactly the same signal after tubes got warm up on the grid and the cathode of the 6n1p tube and on the anode and cathode of the 6p15p tube. Read more My first unit had a problem with the AUX section and the seller sent a new one immediately.

The audio is detailed and transparent and quite revealing that my Mordaunt Short MS15 speakers, although lacking a bit of bas. I can safely say, 100% goods sold are fake (not cheap) and they do it openly, and authority don't care. Rubbish Chinese amps like this one are getting rarer - the majority of them now have excellent build quality and aspire to be a hi-end product. These kits have been put together after many hours of listening tests to confirm the valves performance in any given application.

In other words you are likely to damage the speaker voice coil by driving a speaker with such a signal.Class-D amplifiers work by switching the output between ground and the supply voltage at a high frequency. From my experience any decent vintage amp/receiver from 70s is much much better then any Chinese class D amplifier.

There is general consensus in the audio world which of the pins are assigned to a signal as used by HIFIMAN for instance.They look to be packed with features and a cursory glance at youtube shows a guy who loves the entire line and thinks that they’re plenty powerful. However, in this case it is safe to assume that the actual distortion that occurs inside the speaker will be magnitudes higher than the specs shown on the Nobsound data sheet since it is lacking the output filter. Probably because the one amp is the basis for many many amplifier types that all look different when under the bonnet it's just the same SS amp. A circuit diagram is very difficult to draw, because the circuit is on both sides of the board and the details are too small. The fact is that most speakers will exhibit fairly high eddy losses at those switching frequencies used by Class-D amplifiers.