I really love black colour hifi , and I have a soft spot for Sony, no matter what others said about their (lack of) seriousness for proper hifi. That said, you should really invest in a nice ES CD player and Amp :)
Excellent sound equipment of the Sony "ES" series, however the sound quality is much better to listen to with its original speakers for that equipment, the fidelity is very wide in addition to the high range of sound especially for bass bass. The speakers you use for the "test" belong to one of Sony's third-generation equipment where the equalized and programmed equalization system is no longer used, in other words they are generic speakers that are not compatible for the equipment quality of hifi you have, I recommend you get the originals and so you will see the great difference in sound quality that a Sony ES series needs, as well as the fantastic Dinapower sound equipment.Regards.
John Bender Yes, I agree with your view. Better speakers can give better sound quality than these small book shelf speakers. And I think the way he has placed the speakers, the vibrations are felt to the system itself.