"Nor was there any skimping on the software technicalities, for the Highway Hi-Fi music discs were heavy, quality pressings of 135-gram vinyl with ultra-fine gr

"Nor was there any skimping on the software technicalities, for the Highway Hi-Fi music discs were heavy, quality pressings of 135-gram vinyl with ultra-fine grooves—over 216 grooves per centimetre." 135g Vinyl isn't that high quality when market releases between 120 and 140g especially compared to the high-end 180g Grundman [0] on my desk.... what I didn't know was this was the birth of the 33rpm LP that I bought and listened too as a kid. "But the players had made a mark: microgroove records were an indirect spin-off, serving as slabs of vinyl that were capable of holding one hour of music. These 60-minute discs were being pressed and sold in their millions by the mid-'70s. The neatly titled Gold Hour Records was one of the biggest labels to benefit from that format's success." The 33rpm 'microgroove' record is what we now know as the LP or Long Play record. [0] http://www.youtube.com/watch?v=tSwejSlZFFE http://www.youtube.com/watch?v=tSwejSlZFFE