I have suffered a dent in one metal cone due to an over inquisitive moggy .....used the old sellotape trick to pull it out but still have some minor indents.
Anyone know what effect this has on the sound ?

It shouldn't make a difference, but psychology it will as you have it on your mind that it's not perfect.

Is it an expensive tweeter and easy to change?

I once put me knee in to the driver of a Revolver RW45 speaker while attempting to move it. I just got my hoover and protective cloth and sucked it out, it was perfect. I don't recommend selotape simply because because you have to push more before it pulls, I'd prefer a straight pull.

The double Dutch version, just pulling your chain. doh

Yep, if it's just a dust cap it makes no difference. As long as the driver is still pistoning without being off centre all should be well! Bloody cats!!

Just realised it's your tweeter so it won't be "just a dustcap"! If you've got most of it back out I still can't see it making a huge difference as long as said tweeter is still centred.

There is only one known cure to set it right - replace it. Chances are that when it was dented, it was also bent off center, and unless you are willing to take it literally apart, you'll never be sure again.

When making my own speakers, I also bought 3 spare titanium tweeters, and one has been used up already. The cleaning woman wanted to dust it, she says she just touched it, blah, blah ... less than one hour after I warned her in plain language to stay away from the speakers. Say that to any woman, and you are waving not a red cloth, but a red blanket before a very pissed off bull.

Mark, you are into avionics, you know from your own experience that once a piece of metal has been bent, no matter what you do, it will have lost its natural rigidity and can never be the same again.

Thanks all........just been in touch with KEF.
They reckon it will be ok if its not to dented. Will only slightly effect dispersal of the sound which they say will probably be unnoticable to the human lug oles.
DVV....your quite right though so I will be replacing it soon.
PS...I used masking tape , not sellotape....sorry for not being exact in my description.

Those KEF tweeters uniquite? the ones in the centre can be a bit of a pig to change if I recall, quite tricky.

Cats are particularly sensitive to high frequencies and they're smart enough to know where these sounds come from..

I think it is advisable to replace both tweeters, that is, if your speakers are a few years old.

A brand new tweeter will take a while to 'settle down' and may sound a bit brighter than the old one.

I know, it's a pedantic point but every little bit helps to get the best out of a system Mark.

Are buying new pieces and spare for for speakers and Hi-Fi in general the same as what it is when you buy new pieces for a car?

Can you imagine what it would cost building a car from spare parts? I hope that's not the case for speakers and Hi-Fi.

Oh yes Mike, pretty much the same..

Spare parts in HI FI components come at a premium, if you want the genuine items.

Sometimes, with smaller manufacturers, you can't even find the part..