Maxgain. I'll tell you where I got the folk lore. Straight from the Vandersteen 2WQ owner's manual. So I guess Richard Vandersteen is the guilty party in spreading such tall tales.
From page 3 of the 2Wq manual:
"Using the chart on the bottom of the WX-2, locate the value one setting below the actual input impedance of your main amplifier.(For example, if your amplifier had an input impedance of 100k, you would select the 50k value.)
Also in the 2WQ owners manual(page 5):
(When 2Wqs are used with Vandersteen VSM surround speakers, the crossover should be set two settings below the surround amplifier's input impedance. This will avoid interaction with the VSM series speaker's integral high-pass filter.)
From page 3 of the 2Wq manual:
"Using the chart on the bottom of the WX-2, locate the value one setting below the actual input impedance of your main amplifier.(For example, if your amplifier had an input impedance of 100k, you would select the 50k value.)
Also in the 2WQ owners manual(page 5):
(When 2Wqs are used with Vandersteen VSM surround speakers, the crossover should be set two settings below the surround amplifier's input impedance. This will avoid interaction with the VSM series speaker's integral high-pass filter.)