Super hard to find speakers. The Spendor S20 is the forerunner of the 3/1. In 2018, a Spendor dealer, Gene Rubin posted the following note on an Audiogon forum: The Spendor S20 was the most musical, most satisfying speaker Spendor ever made. Serial numbers 237 & 238 Tested and sound stunning. Some cosmetic dings on the wood. See pics for all angles and close-ups of the biggest blemishes. Don't have the original boxes or jumper cables, but will pack carefully. Size (HxWxD mm): 15” (h) x 10” (l) x 8.5” (w) Weight: 21 pounds HF Unit: SCANSPEAK D2010 19mm soft dome LF Unit: SPENDOR 160mm Homopolymer Polypropylene cone Normal Impedance: 8 ohms Frequency Response: +/- 3dB 70Hz to 20Hz Pair Matching: 1dB Power Handling: 70 watts Sensitivity: 84dB/1 watt/1 metre Maximum SPL: 100dBA at 1 metre Input Connections: 4mm terminals/bi-wired option Crossover Point: 4kHz