When I acquired a used 080 system in 1971, I spent many a happy hour listening to my opera LPs. After getting married in 1974 I rarely spun these items. In the late '90's I purchased CD versions of these same recordings. Something wasn't the same. The vocals were now shrill and overly bright, while the orchestras seemed thin and sorely lacking in dynamics and bass. In short I found the CDs hard to listen to for any extended time, and try as I might with my loudness control I could not replicate the (to my ears) great sound of the LPs. I thought it was both the CDs and perhaps that overly bright JBL sound that was causing my displeasure.
Recently I installed a new top-of-the line Shure stylus which I had hoarded when it was discontinued. I put on the LP and...presto ! That warm, dynamic sound was back and sounded just fine on the old 55-year old speakers.
These CDs were mastered in the late 1980's but I doubt they will ever be re-mastered using newer technologies owing to costs. So guess I'll have to stick to the old LPs !!