plyscds wrote:Yes, Audio-Technica makes...(made?)... a heavier counterweight for the "PL" and "LP" 120s. Using the stock low mass counterweight perched on the back edge of the tonearm with an unusually massive cartridge setup (like a P-mount cartridge in a 1/2-inch adapter screwed to a universal headshell) to play an unusually heavily warped 45rpm record will see the stylus leave the record surface after climbing the leading side of the warp. This is the barbell effect. Using the same massive cartridge setup with the more massive counterweight positioned nearer the tonearm pivot point at the same tracking force will permit the stylus to stay with the warped 45 record, but you wouldn't want to let this go on too long out of concern for the long term health of the stylus and cartridge. Matters do not reach this level of "interesting" at 33-1/3 rpm.
(That experiment was performed with a record and stylus which had been taken out of service.)
I have a heavier A-T counterweight, and for normal record playing I see little need to bring it out of it's box.
Thank you plyscds,
After having read your comment, my question is; do I need this upgrade in the AT LP 120 to use an Ortofon M2 Red?. Anybody here who uses it with no upgrade and with no issues?