[Vintage-Audio] AR-4 Puzzle

[Duane Fischer, W8DBF]

Hi All, 	
	
I just received a pair of AR-4 speakers. There are no markings of any kind to
indicate the polarity of the speaker terminal screws. Looking at the rear,
standing vertical, tweeter adjustment shaft to the right: what polarity is the
top terminal? 	
	
If anyone has any specifications on these speakers, such as:	
	
type of tweeter	
size of mid range/woofer (same speaker) 	
crossover frequency 	
actual frequency response	
minimum continuous RMS required to drive them    	
	
Thanks guys. 	
	
DBF