I've been running an 810 with my lows going to the bottom 410 with replacement neo speakers (Deltalite IIs 2510s, freq range: 60hz-4k), but my buddy has a 1540 cab and I was wondering if I'd get more low end from the 15" if I swapped it out with an Eminence Delta 15LF (freq range: 40hz-2.2k). Just wondering if it would be a good idea to trade and invest in a new speaker. I've been trying to figure out the cab's tuning and volume for WinISD, but I'm not finding much information. Any help would be greatly appreciated! Thanks!