Overall, it sounds great. The mids/high-mids really seem to cut through and we were really impressed with the dispersion of the piezo array. My concrete basement isn't exactly the best testing ground, so we're anxious to hear it in a better room or outside.
After screwing around with our semi-finished OTop for way too long, we figured we better get some work done. We're building the next three at the same time to hopefully speed up the overall process.
Maiden voyage for OTop #1:

Group shots:


