Quoth Sir Larry:

Bueno. What's this 20 ohm 30 watt "square ohm" resistor they're
talking about? Anything like "cam dusters" or "Kanutin valves"?
http://www.adelcom.net/MOTOROLA_ksn1005b.htm

Not even muffler bearings.

I think they refer to the same wire-wound style as the 10 W beige parts
shown in:
http://www2.neufeld.newton.ks.us/ima...2/100_2505.JPG

--Winston