4716 wiring problem ?????

[greg32]

Hi , i have picked up a pair of these cabinets which have proven to be in great shape, all the drivers are working well. i have stripped them down and made a small repair to the baby bum horn flare which has gone very well, my problem is the crossover schematic from jbl http://www.jblproservice.com/pdf/Sound%20Power%204700%20Series/4716A.pdf is very ambiguous regarding the polarity of the 2132 woofer, any input would be great. the schematic says blk + and red - i dont want to get the polarity wrong. best regards Greg

[Allanvh5150]

Hi, As is usually the case with this type of crossover, the bass output is 90 lagging phase and the Hi output is leading phase, resulting in a 180 phase difference between the two drivers. To restore the phase, one driver is wired out of phase. The schematic is correct.

Allan.

[greg32]

Thanks Allan, i understand the phase relation between the high and low branches of the circuit but was confused with the woofers polarity as shown on the crossover schematic , all good now thanks
Greg