During the last weeks at my former employer's company, not starting new projects any more, I have offered to help out at the technical service department, repairing all kind of so called professional audio equipment. It gave me a wonderful insight in cause and result of trying to sell the cheapest products in the market.
No need to list individual cases because the broad lines very quickly emerged of which the most omnipresent and shocking at the same time was that the people who build these apparatus have little to no knowledge of what they are building. Followed by: Everything is copied mostly even copied from copies, and: Try to save on every single item that is part of the product you make.
As a technician, for me it's hard to imagine building, let's say a 2x 1000W power amplifier only by copying from a well known brand, while not understanding the schematic, yet building thousands of it and selling them all over the world.
We received a sample of a record player ( and now I do give another example ) who's arm and cartridge pound on the delicate record with about 600 gram while anyone who ever used a record player knows this should be around 3 gram.
Notifying the manufacturer to decrease the arm weight by, for example, increasing the counterweight, he replied proposing to ad a little weight in the form of a screw to..... the head shell of the cartridge, even increasing the total weight. They had probably never before seen or used a record player.
But those who make these products are not the only ones to blame. We, as a customer often seek the cheapest product available. Be it in the grocery, car-parts shop or when buying an amplifier. Traders answer to that desire in searching for sources to buy products for the lowest price. But ignoring the remarks from product specialists then, is what causes these products to end up on the repair workbench or waste bin all to soon.