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New Tweeters: In or Out of Phase?

I fried a tweeter in a KEF 104.2 speaker and replaced it with a VIFA unit that has .5db higher sensitivity than the stock unit. The VIFA replacement does not indicate + - leads. Does anyone know how do I tell them apart and what are the sonic effects of incorrect wiring? The new tweeters are a great improvement over the orignal 1990 tweeters but are a little bright. I hope this reduces after burn in or is it that they're out of phase? Should I have gone with Morels whose sensitivty is rated at 2.5db less than the Vifa, but might have better matched the 2 midrange elements (from 1990) that might have lost sensitivity since their manufacture in 1990.
Thanks for any responses.
somec59

Showing 2 responses by somec59

somec59 OP
245 posts
 
Thanks for all the replies, here's the latest: The Vifa's do have a very small + - stamped on the inside of the plastic face frame, but I had to remove it to install the tweeters (I tested then with a 9V battery to determine correct polarity). I let them burn in for a week so they don't sound as bright, or is it that I've grown used to it. My girlfriend said she likes the mellow sound of the Shahinian/Theta living room system but she says that the 7:1 KEF hometheater with an 8 foot screen is overload. Please, no suggestions on getting a new girlfriend.
Thanks
somec59 OP
245 posts
 
Thanks for the great replies. It sounds like I should start with a .5 ohm resistor and put it in the line just before the tweeter (on the positive feed??). The crossover is buried somewhere inside between the upwards and downwards firing woofers and I can't get to it.
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