Comparing old and new amplifiers has left me impressed with the size power and convienience of the new class d offerings but not blown away by a better sound so to speak. I admit that my class d tasting experience is limited to Peavey, Mark Bass, Trace elliot and a few Ashdown models. However when upgrading tired old drivers i have been literally blown away by the results. Various threads have mentioned significant advances in speaker design and technology but I was looking for a little more substance in an answer! What has changed? Can anyone summarize? I understand that being TB we are likely to go of on crazy tangents..... But on Friday that's allowed... I am less interested in cab design but hey I'm sure it will come up.... Pleasant weekend to all.. and if already covered......my apologies.