cb_600 Posted October 25, 2017 Share Posted October 25, 2017 Hi, completely new to this forum, but have been reading on/off for years. Klipsch fan to the bone! (And from Norway, so pardon my some what pore english in advance.) I have just recently gotten hold on a pair of Heresy I in excellent condition, technical and cosmetic. I have hade the Forte II and Cornwall II before, both Crites upgrade. So I was wondering of do it to the Heresy as well, even tough they are 100%. But when I opened up the speakers i discovered that there is more to them. The speakers should be completely original, besides the backplate that has been changed. It had been changed for unknown reasons to the former owner, he had the speakers for seven years. But he had the original backplates with ID-stickers, so I got them in storage. To the point, I opened up the speakers by removing the backplates. Discover that the backplate i seriously heavy and filled with damping material, so the reason for change was a upgrade. Then I discovered that the crossover must have been modified as well, all the drivers and internal cabling seems original. My question is: Can some tell what kind of upgrade that has been done on this crossover, it looks like that it have ben added some more components to it. Thanks in advance for any help. Quote Link to comment Share on other sites More sharing options...
JohnA Posted October 25, 2017 Share Posted October 25, 2017 Not sure. I can't tell the circuit routing from just the picture. What sizes are the each of the capacitors? What is the resistor. If you can draw out the circuit, I'd love to study it. Quote Link to comment Share on other sites More sharing options...
cb_600 Posted October 25, 2017 Author Share Posted October 25, 2017 I can try drawing up the circuit and post it here. But to me It looks like there are more components than the usual upgrade I have seen here and in other forums. Quote Link to comment Share on other sites More sharing options...
JohnA Posted October 26, 2017 Share Posted October 26, 2017 Yes, you are correct. Here is the normal Type E. Quote Link to comment Share on other sites More sharing options...
Deang Posted October 26, 2017 Share Posted October 26, 2017 At first I thought it was an LCR in parallel with one of the drivers, and then I noticed that it's wired to the inputs. I would be strongly inclined to disconnect it. The rest of the filter just looks like a straight up Type E. Quote Link to comment Share on other sites More sharing options...
pzannucci Posted October 27, 2017 Share Posted October 27, 2017 Yes, looks like a trap of sorts to modify either impedance or frequency response of one of the drivers. Quote Link to comment Share on other sites More sharing options...
djk Posted October 27, 2017 Share Posted October 27, 2017 Dean is probably right, it's probably there to flatten out the huge impedance peak in the midrange. Looks like an early 70's network with the mylar caps, I would replace those caps and then see how it sounds. Quote Link to comment Share on other sites More sharing options...
pzannucci Posted October 28, 2017 Share Posted October 28, 2017 19 hours ago, djk said: Dean is probably right, it's probably there to flatten out the huge impedance peak in the midrange. Looks like an early 70's network with the mylar caps, I would replace those caps and then see how it sounds. Someone using tubes with high output impedance maybe. Quote Link to comment Share on other sites More sharing options...
moray james Posted October 28, 2017 Share Posted October 28, 2017 just a side note and a personal preference, I would not use metal clamps to hold those two caps in place, a small dab of adhesive will work just fine and sound a lot better. Here is a picture of the kind of stands that I use under my H3 they are four post Skylan Stands which are very solid and stable they are filled with sand that eats up a lot of vibration/energy and they sound as good as they look. 1 Quote Link to comment Share on other sites More sharing options...
cb_600 Posted November 6, 2017 Author Share Posted November 6, 2017 Finally, here's my attempt to draw up the schematics, hope it's understandably. As I see it, the extra crossover can be removed quite simply, the question is what it's for? I just can't see why it's there. So I'm going to try and remove it and see if I can hear any difference, some day soon I hope.. Quote Link to comment Share on other sites More sharing options...
cb_600 Posted November 6, 2017 Author Share Posted November 6, 2017 Forgot to thank you guys for your previous post. Thanks for tips and schematics, appreciate it. One more thing, thinking on swapping out the capacitors, as one of your tips, what capacitors is recommended i the reasonable price range? Or should I just buy Crites sonicaps kit right away? Quote Link to comment Share on other sites More sharing options...
DizRotus Posted November 6, 2017 Share Posted November 6, 2017 1 hour ago, cb_600 said: Or should I just buy Crites sonicaps kit right away? Gets my vote. It’s the easy way, as well as the Norway. Velkommen! Quote Link to comment Share on other sites More sharing options...
cb_600 Posted November 7, 2017 Author Share Posted November 7, 2017 Takk, I think.. But the Crites capacitors seems quite expensive, with shipping and taxes it will be roughly £90. Wouldn't these be just as good, if I got the specs right: http://www.dynabel.no/selvbygg/delefilterkomponenter/kondensatorer/mundorf-evo-oil/kondensator-mundorf-evo-oil-22uf Quote Link to comment Share on other sites More sharing options...
DizRotus Posted November 7, 2017 Share Posted November 7, 2017 1 minute ago, cb_600 said: Takk, I think.. But the Crites capacitors seems quite expensive, with shipping and taxes it will be roughly £90. Wouldn't these be just as good, if I got the specs right: http://www.dynabel.no/selvbygg/delefilterkomponenter/kondensatorer/mundorf-evo-oil/kondensator-mundorf-evo-oil-22uf If those, in the right specs, are a better value, then they would do nicely . Quote Link to comment Share on other sites More sharing options...
cb_600 Posted November 8, 2017 Author Share Posted November 8, 2017 Do you mean better value as in build and material quality, or do you mean measured values? (Sorry, but I have to take it in with teaspoon, have a slow mind) And in the schematics the capacitors are with 2uF, those I linked to had 2,2uF, would that have something to say? Quote Link to comment Share on other sites More sharing options...
DizRotus Posted November 8, 2017 Share Posted November 8, 2017 The former. How much less than £90 would the Mundorfs be? Quote Link to comment Share on other sites More sharing options...
cb_600 Posted November 8, 2017 Author Share Posted November 8, 2017 With local pickup, £33 for four capacitors. Quote Link to comment Share on other sites More sharing options...
JohnA Posted November 8, 2017 Share Posted November 8, 2017 Mundorf caps will be just fine. Solens are made in France and I've had good results with those, too. In a simple crossover like the Type E, changing a 2.0 to a 2.2 will not make a serious difference, but it is better to use the original values so the crossover points remain the same. A 2.2 uF cap will lower the crossover point 10%. Quote Link to comment Share on other sites More sharing options...
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