Is it possible to have an accurate speaker

Well, if you want an easy answer you can take the many different, and opposing, opinions that you will surely get in response to your question (I like Mapman's, btw) and try to find some kind of concensus or distillation. Or, if you want a truly meaningful answer that will ring true no matter all the cries of: "you used different amps", "no two halls sound the same", "you don't know what the recording engineer had in mind", etc., you can make a commitment to listen to A LOT of live music over the course of, say, the next six months; and then you will have a better sense of what the ONLY true reference is all about. It won't tell you which speaker is accurate because there is no such thing; but, it will tell you which speakers get closer to being "accurate" than others. And some actually do a decent job of it; sometimes sounding "warm", other times sounding nasty and shrill and everything in between.

Without getting into details about diffraction loss or baffle step compensation, if you want them "warmer", move them closer to the wall.

The late Brian Cheney did some very impressive live vs amplified sound comparisons at a few hifi shows that must have been difficult to set up and the results were very impressive. Surprisingly, the general public didn't seem very interested in the most honest, no excuses, speaker demonstration.

As a professional musician I have heard some post production studios and even some sound reinforcement setups that were very well done. So depending on ones subjective criteria I would say yes there are some very accurate speakers who performance are very dependent on the room and the execution of their setup which, as a whole, is no small task.

In all, the one thing all this has taught me is that there is no such thing as a full range speaker unless it contains a separately and very robust amplified bass design.

As a (long, long time) professional musician and professional live sound tech I'm AMAZED at the ability of tin eared or otherwise incompetant live sound techs to make a good system sound bad, or they lack the skills to make a mediocre system sound good. My local well equipped concert venue (I name names...The Center for the Arts in Natick, MA, or "TCAN") recently managed to make Shelby Lynn sound like she was playing from inside a small can. She wasn't. This was one of many recent poor sounding shows there...at $45 per ticket (Lynn) the crowd deserves better.

Agree Wolf. As a long,long time play around gia ta playa and concert goer I am amazed at how bad most of the venues sound. I can't beleive how bad they make some incredible musicians sound. If that was how I was introduced to them I wouldn't be as interested in them. A lot of times I say to myself 'I can't wait to hear real music again from my hi-fi system'. And then my dog slaps me and says 'that's not real'! Hey but it is a lot lot better in some cases.