Pulse153 crossover PCB PUBLIC

Not provided.

A friend of mine was having some trouble with an amp & brought it & 2 Yorkville Pulse153 250 watt speaker cabinets to test it. He did tell me that in 1 of these speakers the horn wasn't working so I opened it up first removing the jack plate at the rear. This plate contains the passive crossover components & 3 twisted pair cables: 1 pair to the 15" speaker, a 2nd pair to the horn & the last pair to a tweeter. I checked all of the PCB components good & went as far as removing the other crossover PCB (on the 'good' cabinet) for comparable readings. I rang out the speaker/horn/tweeter & also got good values (as compared to the other cabinet) but noticed on the horn cable (Brn/Blk pair) when it was moved the continuity was erratic.. The Stakon tabs on the horn felt pretty solid so I re-crimped the Stakon connectors on both ends of the cable as well as squeezing in a bit on the connectors' female 'curls'. Continuity checks worked out well which was good as it would be a royal pain to try & replace that big horn. So in this case the crossover is good & that 1156 lamp needs to be there to protect the horn & tweeter. It's too bad that Yorkville didn't include a recessed bulb socket & lens so that one could see if the bulb was good or not. This seems to be an older version of this series of cabinets as there are no Speakon connectors. The 2 Neutrik 1/4" phone plugs have shorting switches but they're not used (actually permanently shorted via PCB tracing).