Deang Posted May 29, 2003 Share Posted May 29, 2003 I have two tweeters. They both pass the continuity check, and make sound when tested by hooking in place of my PC speakers. The problem is that when I set my multimeter to check the DC resistance -- one comes in at 1.8 ohms, and the other is 3.4 ohms. The tweeters are from the DQ-10's I'm restoring. The tweeters are identical. Any ideas what would cause this? Quote Link to comment Share on other sites More sharing options...
John Warren Posted May 29, 2003 Share Posted May 29, 2003 Are the part numbers the same? Has one been reconed? What about the tweeter networks, are they different to compensate? if so maybe the factory made a change. Years ago I purchased a pair of K33Es from a Klipsch "factory" authorized reconer (the reconer for Flanners A/V in Brookfield WI is a place called Wisconsin Recone). They were K33E factory baskets but the woofer DC resistances were 5.5 and 5.2 ohms, not even close to the advertised 3.2 ohms. I didn't even think to measure them before I bought them. I'm still stuck with them. Quote Link to comment Share on other sites More sharing options...
Deang Posted May 29, 2003 Author Share Posted May 29, 2003 They are the original Philips tweeters Dahlquist used -- they are both stamped "4 ohms" on the back of the magnets. I wonder if one might be a later model replacement. The only thing I can think of that would cause it is the voice coil winding. The new one either has more/tighter turns -- or heavier gauge wire. Beats me. Quote Link to comment Share on other sites More sharing options...
John Warren Posted May 29, 2003 Share Posted May 29, 2003 What are the PNs? I have a few Philips/Norelco loudspeaker catalogs from the 60s and 70s here might find it listed. Quote Link to comment Share on other sites More sharing options...
JohnA Posted May 29, 2003 Share Posted May 29, 2003 Could one of the voice coils be partially shorted? Quote Link to comment Share on other sites More sharing options...
John Warren Posted May 29, 2003 Share Posted May 29, 2003 Note that the 4Ohm rating does refer to the minimum value as a function of frequency. It may be still be valid for both drivers (who knows??) Quote Link to comment Share on other sites More sharing options...
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