Originally Posted by
dave2010
Do your discs sound any good? It would surely be very hard for anyone not on the inside, or with forensic knowledge and test equipment to be able to verify or counter the claims, particularly if the recordings sound acceptable enough. The master disc might show signatures due to the material relaxing in a different way from a full speed master, but then a stamper would be produced in order to make the discs, and if there wasn't a huge run of discs, the finally produced records would probably not show any signs of how the master had been produced. If the run was large, then it would be even harder to tell, as each sub master would introduce more errors I think.
I think looking at the HF response and distortion in the HF might be the best bet, but at the end of the day, as with many things, you probably won't have any definitive answers. If the records sound very poor, then I would tend to assume the claims are invalid. Otherwise, if they sound spectacularly good, the claims are perhaps true.
It would be interesting to know what you think of the discs, and what you yourself decide about their production.
all the half speed mastered albums I own were bought used, some from a Canadian reviewers collection and sound outstanding. As for the new ones being offered I haven't bought any to know how good they are and why I was asking the original question. As some are from abbey road studios I would expect them to be genuine, but how good they sound I wouldn't know and as all the Beatles albums Ive heard don't sound all that I probably will stick to older mint copies.
Bakoon 13r Denon DP80 Stax UA-70 Shure Ultra 500 in a Martin Bastin body with jico stylus, project ds2 digital Rullit aero 8 field coils in tqwt speakers
Office system, DIY CSS fullrange speakers with aurum cantus G2 ribbons yulong dac Sony STR6055 receiver Jvc QL-A51 direct drive turntable, Leema sub. JVC Z4S cart is in the house
Garage system another Sony receiver, cassette deck
System components are subject to change without warning and at the discretion of the owner.