Clunk, what I am saying is that the £30 dvd player is poor quality CD audio. Cheap components, poor circuit design and scant regard for audio quality are imposed by its pricing point. The CD audio part is on a chip costing less than $1, it also does the DVD bit too, and as long as it goes from 20Hz to 20kHz, everyone's happy. I'm not saying that it doesn't carry out the functions asked of it, it just does them rather more poorly than a more expensive unit.
You must accept that there are different quality levels in all products, plasma tvs, cars etc... A Kia Pride may get you to the same place as a Lexus, but the ride was horrilble, the engine was underpowered, all because of cost constraints. Everything in the mass market is built to a cost, rather than to a high quality. The low volume companies strive to keep high standards, but quality costs!