I had original Walsh 2s from 1982-2008, a long time.
Once at an outdoor party I had them cranked to max off a high quality Tandberg 80 w/ch receiver. No problems. The music sounded loud and live in the adjacent field over 50 yards away. With good quality amplification, I always considered all OHM Walshes about as indestructible as they come. They still sounded great in 2008 though I never cranked them that loud probably and age will eventually do in anything. Plus its always possible to blow up speakers if one goes to extremes too quickly or an unexpected accident happens. Caution when testing the limits is always advised. I've always found a lower power amp that clips sooner is more likely to cause speaker damage than a higher powered one that can go loud without strain. In general I think teh OHM walshes are capable of going full range louder and clearer than most any other passive speaker in their price range. So you will be in a very good place to start after the upgrade. I am very confident of that.
Once at an outdoor party I had them cranked to max off a high quality Tandberg 80 w/ch receiver. No problems. The music sounded loud and live in the adjacent field over 50 yards away. With good quality amplification, I always considered all OHM Walshes about as indestructible as they come. They still sounded great in 2008 though I never cranked them that loud probably and age will eventually do in anything. Plus its always possible to blow up speakers if one goes to extremes too quickly or an unexpected accident happens. Caution when testing the limits is always advised. I've always found a lower power amp that clips sooner is more likely to cause speaker damage than a higher powered one that can go loud without strain. In general I think teh OHM walshes are capable of going full range louder and clearer than most any other passive speaker in their price range. So you will be in a very good place to start after the upgrade. I am very confident of that.