I have a set of L100 Century Cabs, no drivers yet. My question is how do I find out if the crossovers used the 123A-1 or 123A-3 woofer? The cabinet numbers are 55619 A and 55624 A, any help would be appreciated. I have read that the two different woofers use different phasing. For the heck of it, here’s a pic of front of label.