Heard thes at Carl's last Sunday. We had a stock pair of C-8 ltd's to compare. Rotated in and out in the same position with same accompanying gear.
I thought Rick's new external X/O improved an already good speaker considerably. The first thing I noticed was improved dynamics and sense of ease. Then the increased bass extension and detail. The mids opened up and everything felt less held back, less restrained. There was less hardness in the upper mids/ highs when the piano hit hard. I'll be talking to Rick at some point about the upgrade. Well done!