What JBL who invented the shorting rings on woofers ... to reduce
inductance ... ?but what about this patent ?
http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PALL&p=1&u=/netahtml/srchnum.htm&r=1&f=G&l=50&s1=3935399.WKU.&OS=PN/3935399&RS=PN/3935399
Who is the clever manufacturer that popularized it all ?
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