Here are some pics of my HPM 1500 I purchased a couple weeks ago.
These speakers sound fantastic. I am very happy with my purchase, However, I don't understand these super tweeters. I don't hear any sound from them when I put my ear real close. I asked the seller what was up with that and he replied the super tweeters were for subtle accents to the high frequencies. I thought he might be feeding me a line but I purchased the speakers anyway based on price and how great they sounded. When I have the time I will take them into the local stereo repair guy and have him take a look. At this point, I am not too motivated to haul them around. I'm having too much fun listening.
The mids and highs on these speakers are super fine. I come from a collection of dark headphones(hd 650, lcd 2, dx1000) so it is nice to fall in love with the higher frequencies. Bass just seems right and can go deep. I really have no reference point as these are the best speakers I have owned. If I have to sink some money into them at some point, I won't mind.
Alrighty..........time to que up some pink floyd!!