Schweik:"Guran,if you dont like the thread,do not post".
RE:I guess you didn't start a thread for it to be "liked" but to initiate some exchange of views on a subject.The title however may invite to sales promotion 'in disguise' as I said before and this risks making comments questionable ( if positive) as being possible advertisement for a particular maker - or in reverse (if negative) as mistreatment of business etiquette.I know this may seem unavoidable in the 'free world of internet' but it may still be worth considering.
It is different when speaking of makers out of business but my objection there was that we all have so little 'reference material' that individual opinions may risk distributing rumour more than fact.

Schweik:"but also different quality steel,can give a different sound to the reeds.[please correct me if I am misinformed]".
RE:According to reports I have got there has been very little difference in delivered "reed steel qualities" at least for a 100years but certainly some differences occur.That is for *steel*. There have been brass and some iron alloys been used for reed making causing more difference in reed physics.There *has* however been quite a lot of marketing gimmicks related to "reed steel" from several makers in history - all of them claiming having "the hardest steel". The most important factor causing practical differences in "reed qualities" IS the processing.

Schweik:"different action[hook lever or rivet]can affect action response "
RE: Depends what you mean by "response".There is no reason to believe that there is any significant difference regarding sound "response" related to the type of action, conditionally that the whole mechanism is in good shape of course.Wear or damage of the parts will act differently though depending on the construction.

Schweik:" plus lightness of springs"
RE:Worth to consider. Some players seem to believe that lighter springs may make 'fingering' faster and that may be true of course for the *fingering* itself but on the contrary regarding sound "response".

Schweik:" but also the skill/knowledge of the concertina maker/repairer in getting the concertina to respond in a certain way,is vitally important".
RE:Agree, it IS the quality of reeds, the setting of the reeds and the adequate functioning of valves that do most.

Schweik:"however [imo]certain things are very difficult to improve,for example Jones that have broad reeds,are going to require more air,to push the reed to make it sound"
RE:Hardly correct.The width of the reed has no effect on onset time and 'air resistance' ought to be unimportant too.The width itself has no importance for pitch either so my guess is that the choice of broader measures was related to some choosen processing feature meant to contribute to "softer tone" - IF that is a true effect related to the Jones reeds...It may seem so, but I don't say I am sure about it.

Schweik:"ok, these broad reeds last for a long time, but they are not going to be very useful when the player wants to play quick reels.[or is it some other fault that makes broad reeded Jones slow]"
RE:I wonder If that saying "last a long time" has any factual bearing.It was also advertised that they stayed better in tune.It would be interesting to know if that had any substance. I also wonder about the relevance of the saying that they are generally slow(er) but I suspect that might be true. IF it IS true we have to consider some other things. a)Just as you remark Dick, it is when *wanting to play fast* this is a negative factor.IF *wanting to play soft with a nice tone* the onset speed ( or max power) may be completely irrelevant. b)This possible slowness is expected to be perceived when playing Anglos at high speed for instance and to my knowledge the most common or known Jones Anglos, like comparable Lachenals, did not belong to the "top of the line" models generally speaking? Good comparable knowledge and experience from Jones Englishes on the other hand (and belonging to the "top of the line") I believe is rare.A risk for not so well founded rumours again...