Found a 1967 Decca stereo test LP in a secondhand shop - How To Give Yourself A Stereo Check-Out (SKL 4861). Although my system sounds pretty good I've been using the test record to check it's set up correctly. One track deals with tone controls. You hear low, mid and high frequency warble tones. According to the narrator (Jack De Manio) you should hear them at the same volume. If you don't, you need to adjust the tone levels using the tone controls. (Remember tone control knobs?) When I listened, the midrange frequencies were by far the loudest, high and low frequencies sounded quieter, the high frequencies much quieter. My Arcam amp doesn't have tone controls so there's nothing I can do about that. Unless someone out there knows better. So, assuming my Arcam FMJ A19 has been designed and built to give me the correct tone levels, and my fairly new Nagaoka MP-200 has been correctly set up (it was done for me by a hifi pro), the only conclusions I can draw are that either my hearing is impaired or things sounded different in the 60s...