Shure Audio Obstacle Course Records


Anyone have these LPs? I stil have my Era III  and Era V. Every couple of years I put them through their paces. I guess I'm showing my age! 
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@ zavato,
I have the era IV. One of the best test records made. I use the resonance test band for testing arm and cartrige compatibility. Highly recommended!
My brother in law has the Era II, along with an ancient Dual with his V15 Type II cartridge. All of which he bought in the late 60's.