I think I'll stay out of the marketing discussion and get right to the point of the initial question. How does multiwave sound? I've been running multiwave in a P300 for about 3 weeks (it took about 3-4 weeks from web order to delivery). There are multiple multiwave choices, some are easily discernable, others more subtle (e.g., I couldn't hear a difference). What I have found is that the image depth increases and most notably the transient attack (e.g., cymbals, snare drum)is much more sharp/quick. These differences are clearly evident and repeatable. All for the better. Heat: I purchased the fan kit and the multiwave board and installed them at the same time (really, a no-brainer if you pay attention to the very detailed instructions). I can not hear the fan unless I put my ear very close to the unit. Does it get any hotter than before the install? I can't really tell. The unit does get warm to the touch, no question (it did before too). The unit has worked flawlessly since I bought it about 2 months ago. I'm running a tube preamp, a DAC and a transport into it and running less that 100W. Hope this helps. Bob
