Yes I had visited this site before and I had already determined to sling 6 or so ohms across the piezo and cross them conventionally at either 3K or 4k actually adding about 0.68Mh to the 5" to stop things getting to bright in the upper mids and then padding down the tweeter till it all smoothed out (if at all!)But now it looks like these clones may not be anything like the originals and I could be on a wild goose chase. Still as I say, apart from being a bit " shouty " in the upper mids they dont sound that bad! but then again I am the wrong side of 55 and they old tin ear is beginning to take its toll.Incidently ,I emailed this CPC outfit and asked them for a response graph & surprise ,surprise the girl there says she will fax me one. If it looks anything like a KSN1038 Ill report back!