Quote Originally Posted by Ed_in_Tx
Speaking of old Stanton cartridges, one popped up on ebay I've not seen, only imagined it probably existed since there was a Pickering 4500Q CD-4 cartridge... a Stanton 780/4DQ. How rare are those? I suspect it's placement in the lineup would be similar to the Pickering 3000-Stanton 881? 780 like a "calibrated" 4500Q?

There was never a Stanton equivalent for the XUV/4500Q, which, in my opinion, was the best cartridge ever manufactured for the playback of CD-4 records. The Stanton 780 was more likely the Stanton equivalent of the earlier XUV/2400Q design, which frankly, was pretty horrible. Even Walter Stanton himself, in a rare statement of this type, stated the design was "a bad one." The early CD-4 cartridges from both companies tracked heavily (as did others from Audio Technica) and sounded simply awful.

The XUV/4500Q was a major departure from them, utilizing (for the first time) samarium cobalt as the magnetic material, and a super-thin cantilever. It was the first - and only - CD-4 cartridge capable of tracking at 1 gram. It had the misfortune to have been introduced almost simultaneously with the collapse of the quadraphonic market, but the XSV-3000 evolved as the stereo deriivative, employing a less drastic stylus deisgn, designated "Stereohedron" instead of "Quadrahedron," and it was an enormous sales success, morphing into the Stanton 881-S.