The March 2009 edition of Hi-Fi World wrote a small review of the B&W 683's.
According to their measurements, the magnitude of Z drops down to 3.5 ohms.
So I think an amp with a low Zout and that can provide lots of current is needed to drive these.
In many ways the 683 are a good value - getting the FST mid range unit and other trickle down technology.
However, looking at the frequency response, its clear the crossover could have been better.
... and speaking of marketing,
H-Fi World measured a rising output above 10KHz, lifting to + 5dB's at 16KHz.
... lets boost the treble so people think they are more accurate.
.
I find that tough to believe, but hearing is believing. As my Seas project is now on the stands doing just fine, (Clatiry on the tweeter) I will rebuild my Dayton/VIfa's with good caps ( it has electro's) and see before I built a total new crossover and put in the XT-25 VIfa's in them.
to say it in a other way. less good drivers with good caps sounds better den very good drivers and crappy caps
OK, OK. I'm ordering some less crappy caps ( Daytons), and then maybe some "good" ones to see how big the difference is on the cheap Vifa's in an older pair that are next on my list to upgrade. They have electrolytics in them. I'll test the caps before I swap the tweeters. I still contend, the difference in a $25 tweeter and $50 tweeter matters more that a decent poly cap from a great cap. I will keep my ears open and listen myself.
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