[Vintage-Audio] Update On AR-4 Info

[Gerry Steffens]

It is strange that no one has addressed the physical aspects of speaker
connection like thrust force, cone travel, response to wave-shape (wave
front particularly), etc.  In addition to more modern literature, you
might check out some of the speaker documentation put out by Jensen,
Western Electric, Utah and others as early as the 1930s.  It tends to be
more specific than the newer info regarding polarity.  I learned my
lessons the hard way on a mid 30s L-18 Jensen (18 inch theater and later
organ speaker) hooked to a parallel, push-pull quad of 2A3 single
plates.  I had been warned but being a younger know-it-all engineer, I
though I knew better.

One of the businesses in which I am a participant is a speaker repair
shop.  Y'all just keep hookin' those critters up backwards so they suck
the cone in instead of forcing it out on the leading edge wave-front of
a good firm drum beat and crank the volume to the max too!  Daddy wants
more boat-anchor radios and some more vintage audio equipment.

Cheers,

Gerry

Collecting & Restoring E.H. Scott, 
McMurdo Silver, Hallicrafters, Zenith 
Transoceanic and any other interesting 
Radios and audio equipment since 1959
Gerald Steffens P.E.