Bought some 4410A's from a guy in town. Listened to them at his home just to make sure they worked and brought them home.
I connected them to the system and found a tweeter was not working. Took tweeter out, checked it with a multi-meter and clearly there was a break in the voice coil. Spend two hours total fixing it. 4.1 ohms which matched the other tweeter. Cool. Still they did not sound right, not enough low end. Checked on line for wiring diagrams and some forum reading on JBL cross-over to driver wiring. Took out the drivers, checked the polarity of all drivers with a battery because the woofers were wired opposite of each other (good news!). Connected all drivers with the wire with the black stripe to the black/negative terminals on the drivers even though the woofer black terminal was the positive terminal.
Put them back together and onto stands 10" above the floor tilted up and put them into production. They sound awesome and the Pioneer HPM-100's with upgraded cross-overs are going on Craigslist today. No comparison. Should have changed them out for good JBL's years ago.
Anyway, still wondering about the driver wiring. The diagram shows that the tweeter should be out of phase with the other two drivers but the woofer terminals have confused me a bit.