I would respectfully disagree with the comment regarding advances in technology. Unlike computers which have a absolute quantifiable measure of advance which is distinctly advantageous and readily usable to virtually all users, I don't think the advances on some fronts of the audio arena are necessarily a good thing in all cases. There are prodcuts designed and built decades ago that, arguably, will still hold their own against more modern designs and to some folks actually sound better than modern counterparts. Indeed there are no absolute terms in audio, and the charts, graphs and numbers seldom tell the whole story, nor do they always correspond directly to the aural experience of the component being measured. Certainly the digital front-end would be a possible exception with advances bringing it closer and closer to the sound of LP's.......er, ah, hey, wait a minute!!!
Marco