Here is a tip to tame some of the harshness in the mids from the XLS1500. Use the speakon out from the amp. Another user informed me that the pins from the Banana post are compromised with the quality from the speakon being much better. I re-terminated my cablse for speakon and it did wonders. Now the mid-range sits just right without the bit of glare or hardness it had before.