Hello There. Just Passing along some cool tips today! Most Cd plyers are designed with cheap And outdated Parts That are upgradable sometimes simply by Replacing the opamps and r recovery diodes in the power supply. There are alot of other things like Clocks, Discrete output stage ect. Do A audiogon.com search under Burr brown ( Op Amp upgrade ) To start things off. I replaces the Stock 1$ 1.00 opamps in my rotel and made a big diffrence Digital Glare is gone and am able to use some cool old stock tubes in my frontend of my poweramps. Also look at audioasylum.com under tweeks. Vr-4's are kicking ass. They dominate the whole frontroom now. Wife dosent care they look Fantastic