From the Stereo Buyer's Guide, 1981 (I didn't check other years):
ON THE SPECS 1TUMBLEWEED POSTED IT SAYS 20- 20,000 HZ . i just noticed in the picks of crossover jack with specs on speakers say 20- 28,000 hz AS SEEN IN PICS I POSTED LINK TO . i will have to start a new thread looking for the...