Speaker impedance patterns - how to read them?

Thanks to all, twoleftears's post is useful and yes, my question wasn't meant to trigger a 'who cares?' answer..
BTW, I know about sensitive (not efficient) speakers, and the two links in twoleftears's post are clear about the sensitivity/impedance pattern issue.
I'll read the threads,
best
M.

millercarbon,

are you talking about me? Because if it's so, the discussion ends here.

I shouldn't even have started it. The point of abuse has been reached soon..
And as far as you are concerned, the late Maurice Chevalier is reported to have said: Men choose a woman in such a dim light they'd never buy a dress in. I suppose this applies to you.
Well I prefer to know what I buy. Thanks to all, I am leaving the thread.
M.

clearthinker,

thanks, those are the criteria I am currently considering of importance; as for the Asperger affair, I am always amazed at how people feel entitled to throw judgments and epithets into the discussion because they are safe this side of the Internet... But I am no newbie to forums.

rudyb,

if the only determining factor were one's ears, audiophiles wouldn't spend a lot of time, money and mental energy changing and listening.. I find it funny that most of them buy a car, a fridge, a pair of shoes with the outmost care then rely on absolute lack of science and on hearsay to assemble a music system that is supposed to rely on science to do its job properly. Nothing wrong with some objectivity I think. Thanks for your opinion.

Max 

Hi all,

thanks very much for the several interesting and useful replies. And for the kind welcome, I am new to this forum.
I've bookmarked a few links and will read the pages carefully; on the other hand, I am well aware of what some, like tablejockey, have said - it's not a good idea to rely entirely on specs, and that's what I am not going to do. My starting point with this thread was to take advantage of the solid background of many to bypass, for once, the usual criterium of just listening and to try and find a bunch of speaker systems that match well my amp on an electrical basis. To do that, I needed to learn how to correctly interpret an impedance graph.

I think that with an amp like mine - which I am keeping because I like it, sonically and visually - it may be better to use a speaker system with not necessarily an extremely high sensitivity - which in my experience is often paired with low impedance, at least in critical points on the FR - but with a regular, highish impedance pattern. I too think that 87/88dB or so and a minimum 6ohms should be good companions for my tubes.

Earlier this afternoon I listened again to a pair of Naim n-Sats, which I used to have; they are not at all of anyone's taste, but have some nice qualities. They are a sealed box and the 'woofer' is about six inches. I am not saying that I like them more than anything else, but they surely would be a sensible choice. Unfortunately, they have an idiosyncratic voicing and can only satisfy certain room acoustics. But I got a better impression of them from a more aware listening.

Thanks to the careful reading of a number of papers I didn't know, I now have a clearer idea of what to look for; one year ago I would have based my choice on brand, looks, number of drivers... Now I know better and I can demo speaker systems with a clearer idea of what can be ruled out soon and what can be tried at home.

Thanks for now for the precious help,
greetings from rainy Italy.
Max

Hi,
thanks. I'm reaching the point where knowledge is not enough to solve problems but is enough to create some...

I can add a pair of Klipsch Heresy IIIs to the system and I think that'll be the answer. Conceptually contemporary. From this point on, it's a matter of amp and speaker dealing with it. So to speak.