I'm pretty sure the cab has the Electro voice 1828 driver. I'm sure any re-cone service would have the parts to repair it. Best to send the complete driver and let them do the repair. The mid horn bell is the Electro Voice 8HD mid horn that starts at 800 HZ. You can download the all the specs from Electro Voice.
The back of the input panel of the cabinet has a cover over the Bi- amp input which diconects the internal passive cross over and is a direct connection to the horn driver. That is only used if you have an external electronic crossover that will divide the signals into Hi out and Lo out.
Kustom made two versions, the standard Pro 3W and the Pro 3W SRO which would have the EV premium speaker. The two piezo tweeters add some sizzle above the 3K range.
If you can find someone to repair the driver, I think Peavey has an XT22 or something like it.
pleat
Thanks for that detailed post, I appreciate the info. Not that I've ever used them but I never realized the bi-amp jacks operated that way.
The driver isn't an 1828, as this one is round and has fins. I wasn't aware that these could even be repaired and would prefer to go that route. Any recommendations?