According to the dealer the 300 is more "tube like", generally understood as "warmer" sounding.
I have been using the Spectral DMA 400's for about a year. I have used the Spectral 360's and 180 in my system. The context is a full Spectral system (4000SL CD player and DMC30SSII preamp) all signal cabling is the top MIT Oracle MAX SHD. Loudspeakers are Magico Q5's. The sonic improvement from the 360's to the 400's is quite staggering. There is an immediate sense of the frequency extremes being extended. The whole presentation is at once more dynamic, lively, and spacious, with much more inner detail resolution. If the 300 amp ends up sounding like a less powerful pair of 400's that may very well become the "sweet spot" of the Spectral amplification line. At this point, were it my main amplification, in the context of an all Spectral audio system, the 300 amplifier would be the lowest model that I would consider (Assuming that it is cut from the same sonic cloth as the 400's). Swithcing from these new reference amplifiers to their previous models is similar to throwing a light blanket over your loudspeakers!



