geoff. Posted November 27, 2016 Share Posted November 27, 2016 Hello, long time Klipsch fan, second time caller. I upgraded my '86 Cornwall 2 tweeters to the k-107-Ti and replaced the K-77's in my my '84 Cornwall 1's with the k-79's from the swap. The '84 CW1's have the B-3 crossover with the same k-57-k squaker found in my CW2's. All other considerations aside, for now..., my question is: How, or can I tap the k-79 tweeter on the B-3 crossover to account for the decreased efficiency? The short answer is the one I am looking for, BUT I love to dream, so everyone's take on this will be well received. Let it roll! Quote Link to comment Share on other sites More sharing options...
Deang Posted November 27, 2016 Share Posted November 27, 2016 4 hours ago, geoff. said: How, or can I tap the k-79 tweeter on the B-3 crossover to account for the decreased efficiency? You can't. You'll need to put the K-77's back in or go with another 105dB/2.83v tweeter. Quote Link to comment Share on other sites More sharing options...
geoff. Posted November 27, 2016 Author Share Posted November 27, 2016 Thanks Dean. With my preamp treble full at a 5db gain the k-79's sing and the presence comes back. Being behind the motorboard likely does it no favours either. I was considering upgrading the crossover im my Cornwall II's with the Crites boards. If I used the crossover from there in place of the B-3's would I be back in business? The driver complement is the same. Thanks again for your input on this. Quote Link to comment Share on other sites More sharing options...
djk Posted November 28, 2016 Share Posted November 28, 2016 Move the tweeter crossover input up to the top tap on the autoformer and it will be the correct level. Quote Link to comment Share on other sites More sharing options...
Deang Posted November 29, 2016 Share Posted November 29, 2016 I thought it was already off of Tap 5 ... Maybe not better to run it off right off of input positive? Quote Link to comment Share on other sites More sharing options...
geoff. Posted November 29, 2016 Author Share Posted November 29, 2016 This is the autoformer from the B-3 crossover. Since everyone has been so helpful, I pulled the back off and took some more pics. Quote Link to comment Share on other sites More sharing options...
geoff. Posted November 29, 2016 Author Share Posted November 29, 2016 The taps aren't perfectly clear so I drew a diagram on the closest thing I could grab. Quote Link to comment Share on other sites More sharing options...
geoff. Posted November 29, 2016 Author Share Posted November 29, 2016 Looks like tap is the top tap, on the right. How would I run it off of positive in? Another shot of the crossover. Quote Link to comment Share on other sites More sharing options...
geoff. Posted November 29, 2016 Author Share Posted November 29, 2016 ...excuse me... looks like tap 5 is the top right tap. Quote Link to comment Share on other sites More sharing options...
geoff. Posted November 29, 2016 Author Share Posted November 29, 2016 Before I hit the sack, I would like to thank everyone for their help with this project. Quote Link to comment Share on other sites More sharing options...
CANT Posted November 29, 2016 Share Posted November 29, 2016 https://community.klipsch.com/index.php?/topic/159251-k107ti-vs-k77m/#comment-2012265 You'll need to convert your crossover to either a CWII or Chorus... neither of which is all that hard to do really.... Quote Link to comment Share on other sites More sharing options...
geoff. Posted November 29, 2016 Author Share Posted November 29, 2016 Thanks CANT, I think I will upgrade the crossover in my CW2's and relegate the old ones to the CW1's with the B-3 crossover, for now... I have yet a third pair of CW1's with the B crossover that will get the B-3 as an upgrade. If I don't sell them. They were going to become Cornscalas but the U.S.$ exchange rate here in Canada has put a real damper on that project. For now... Now...after plodding through the forum further, it seems DEANG makes crossovers too. Any thoughts about the crossover for the Cornwall 2's? My first pair of Cornwall's were the '84's with the B-3/k-77/k-57/k-33 compliment. I thought they were a game changer, having previously had Heresy1's, Heresy2's, Tangent 500's, Forte ii's Quartet's and RF-3's. None of them had the punch in the gut the Cornwall's have. I then stumbled upon another pair, the '79's with the B/k-77/k-55/k-33 that WERE destined to become Cornscala's. Not two weeks later I was graced with a pair of '86 CW2's and the difference IS immediately noticeable, in a GOOD way. Just last week I lucked into a pair of CF-3's and the BIG horn and SOLID bass is a another game changer. But the CW2's are staying. At low volume they outshine everything else. Quote Link to comment Share on other sites More sharing options...
Deang Posted November 29, 2016 Share Posted November 29, 2016 Too confusing to follow. Too many Cornwalls. Too many networks. Quote Link to comment Share on other sites More sharing options...
djk Posted December 1, 2016 Share Posted December 1, 2016 A B3 has a K77 on tap 4, a K79 would need to go on tap 5 (the input, like the CII). 1 Quote Link to comment Share on other sites More sharing options...
geoff. Posted December 1, 2016 Author Share Posted December 1, 2016 Tap 5 "appears" to already be in use. It is the top right in the picture. If you require any more shots of the crossover, please let me know! It would be great to find a simple wiring switch for this. Thanks for your time! Quote Link to comment Share on other sites More sharing options...
geoff. Posted December 1, 2016 Author Share Posted December 1, 2016 ...here is another shot of the autoformer... Quote Link to comment Share on other sites More sharing options...
djk Posted December 2, 2016 Share Posted December 2, 2016 "Tap 5 "appears" to already be in use. It is the top right in the picture. " So now you know where to hook the tweeter crossover to. Quote Link to comment Share on other sites More sharing options...
geoff. Posted December 2, 2016 Author Share Posted December 2, 2016 Please forgive my relative level of incompetance here, but what do I do with the wire already attached to tap 5? ...be nice... lol Quote Link to comment Share on other sites More sharing options...
Deang Posted December 2, 2016 Share Posted December 2, 2016 Leave it in place. Just solder the tweeter wire to tap 5 along with the wire that's already there. Quote Link to comment Share on other sites More sharing options...
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