Hi JLM
I think you pose a very interesting question. A good friend of mine who is an audiophile with a lot of experience of good equipment was happy with his set-up (unusual for an audio nut!), which featured Apogee Stage speakers with a Sunfire sub and pretty high quality amplification (Krell KSA-100S, Electrocompaniet 4.5 pre). He bought the NF Ref9, and spent some months comparing it to the Krell, mostly favourably - although it wasn't the slam dunk I was expecting. The Ref 9s were crystal clear and very detailed, with great imagery (especially in combo with the Apogees), but after some time he noticed some harshness on vocals that began to bother him. I could also notice it once he pointed it out. Anyway...
Recently, he purchased a pair of acclaimed pro monitors from JBL, which are active: the LSR 6328P. He now has a quality of sound that is unsurpassed in his experience in just about all aspects. I have heard them a couple of times, and found them quite incredible; they have a clarity that knocks off anything else I've heard while still sounding very natural, with fantastically tight, gutsy bass and imagery that is simply sensational. Undoubtedly, they bring rock to life in a way that I have not experienced before - and they seem just as good for any style of music.
The only drawback is that they are most suited to near-field listening, which is always his preference, but not necessarily mine. I haven't heard them in a more "normal" loungeroom situation.
Anyway, since my friend purchased the JBLs, I have been thinking about changing to active speakers. I certainly like the NF Ref9s, and have no doubt that the SEs are better again, but they would have to be to equal the wonderful sound of these active JBLs. Yours is the first squeak I've heard from any source other than my friend that acknowledges the tremendous quality of sound that is possible in a domestic audio context using active speakers. I am most interested in Jason's response.
Cheers