http://www.audioheritage.org/vbullet...reply&p=336969
you're right, when launched the Cabaret series was designed with the K series and alnico magnet. Actually you have got the earlier version
From JBL doc a pair of 4623 is a good choice for sound reinforcement system (string instruments) in a room with an auditory from 150 to 250 people ...
For home use i'll prefer listening the 4628 with the medium added ...
Others pics i have forgotten about crossover plus drivers wiring color conventions (according to pdf JBL tech doc)