dstrachan Posted December 3, 2005 Share Posted December 3, 2005 I have done the cap upgrade on my Fortes and am pleased with teh results. Is it worth replaceing the old resistors? Al Klappenberger, while not offering any upgrades to the Fortes, has suggested I replace the inductor in the tweeter filter. Has anyone done this? Does it make for an improvement? ANything else X over related that I should try? What about basket damping etc? Thanks fo your help. Dave Quote Link to comment Share on other sites More sharing options...
jerohm Posted December 4, 2005 Share Posted December 4, 2005 This is NOT a commentary on IF it should be done, but more to give you an idea HOW it CAN be accomplished if you so desire... Quote Link to comment Share on other sites More sharing options...
jerohm Posted December 4, 2005 Share Posted December 4, 2005 A - exposed trace for soldering pad for inductor B - removed some extraneous trace to allow a slot to be cut to pass foil inductor lead. C - "elliptical" hole for inductor zip strap. These modifications were accomplished using a dermel tool (cutting wheel, grinding heads), small set of files, X-acto knife, soldering iron and a little patience. Quote Link to comment Share on other sites More sharing options...
jerohm Posted December 4, 2005 Share Posted December 4, 2005 This diaphragm's (+) wire seemed to have broken AT the connector. I took a single strand of copper wire from an electrical cord and managed to re-solder it to the connector (easy) and the original voice coil wire (that was a B!TCH). I applied clear fingernail polish over the 'new' wire and connection. Now it measures 8.6 ohms, the same as it's mate.... yeah DOES it work again.... Quote Link to comment Share on other sites More sharing options...
dstrachan Posted December 4, 2005 Author Share Posted December 4, 2005 Looks impressive. How does it sound compared to the original? It looks like this is the Forte II X over, correct? I have the Forte I which is P to P. Thanks for posting. Dave Quote Link to comment Share on other sites More sharing options...
Moderators dtel Posted December 4, 2005 Moderators Share Posted December 4, 2005 This is strange ,yesterday i loadid a pic of my Forte ll crosover in my computer but could not get it on the forum? Have to go back and read about putting the pic on the forum. I was going to ask if there was anything i could change that would make a difference in the mid and high freq, a little more high freq would help.How does it sound with the new parts, mine is 1992 model is that old enough to have a change in the xover from original. Quote Link to comment Share on other sites More sharing options...
popbumper Posted December 4, 2005 Share Posted December 4, 2005 Now THIS is a modified Forte II network....naw, really Jerohm, nice work on the changes. No sign of excessive hot glue or parts munging. These networks CAN be modified neatly in some cases, though I prefer to rework them completely. Of course, hearing a difference IS the point... Chris Quote Link to comment Share on other sites More sharing options...
dstrachan Posted December 4, 2005 Author Share Posted December 4, 2005 Popbumper, Now that is beautiful!! How much did these improve the sound? Have you done this for the Forte I's?? Quote Link to comment Share on other sites More sharing options...
popbumper Posted December 5, 2005 Share Posted December 5, 2005 I have built these networks for several speakers - Forte I and II, Chorus I and II, Academy, KLF20, KLF30 and KLF-C7. The improvements I personally have noticed are tighter bass, and cleaner midrange/highs; others have confirmed the same. Movie soundtracks are far more lifelike than they ever were before the mods. I am convinced that the most effective changes are those which address the entire frequency spectrum, not just part of it, which is why I chose to rebuild the entire crossover as opposed to doing only a partial rebuild. I DO however agree a partial rebuild WILL enhance the sound quality, as many have done. Chris Quote Link to comment Share on other sites More sharing options...
djk Posted December 5, 2005 Share Posted December 5, 2005 "a little more high freq would help" Add a 1µF cap from the input of the first 2µF cap in the tweeter circuit to the output of the second 2µF cap feeding the tweeter. This will change it from a Chebychev to a Cauer, and boost it a small amount (only 1dB~2dB). Quote Link to comment Share on other sites More sharing options...
colterphoto1 Posted December 5, 2005 Share Posted December 5, 2005 I have built these networks for several speakers - Forte I and II, Chorus I and II, Academy, KLF20, KLF30 and KLF-C7. The improvements I personally have noticed are tighter bass, and cleaner midrange/highs; others have confirmed the same. Movie soundtracks are far more lifelike than they ever were before the mods. I am convinced that the most effective changes are those which address the entire frequency spectrum, not just part of it, which is why I chose to rebuild the entire crossover as opposed to doing only a partial rebuild. I DO however agree a partial rebuild WILL enhance the sound quality, as many have done. Chris I have Chris's Kstack in my KLF-C7 and it is beautiful for dialog. Keeps up with my Cornwalls and is crystal clear. Very punchy across the entire spectrum. It had more effect on the low end than I would have thought possible. I would highly recommend his work. Easy swap out too! Michael Quote Link to comment Share on other sites More sharing options...
justonemore Posted December 5, 2005 Share Posted December 5, 2005 I agree with what Michael just said. I have a KStack in my Academy. The first movie I watched with it in was Kill Bill vol. 1. Before Bill had a lisp that bothered me and the KStack cleared it up nicely Quote Link to comment Share on other sites More sharing options...
jerohm Posted December 5, 2005 Share Posted December 5, 2005 Now THIS is a modified Forte II network....naw, really Jerohm, nice work on the changes. Chris Hands DOWN Chris, you (and the other guys implementation I have seen) win in the beauty contest! I KNOW NOW, that the alpha-core foils are a pain to work with. The Sonicaps are nice because of their size. The pictures were posted pretty much only to spark others with possible implementation ideas. My goal was to keep costs to a minimum and be completely reversible. Quote Link to comment Share on other sites More sharing options...
Deang Posted December 5, 2005 Share Posted December 5, 2005 No glue no glory. Quote Link to comment Share on other sites More sharing options...
popbumper Posted December 5, 2005 Share Posted December 5, 2005 Someone must be feeling guilty....I certainly saw NO mention of your name in this thread. Of course, now that you brought it up......;>). Chris Quote Link to comment Share on other sites More sharing options...
Garster Posted December 5, 2005 Share Posted December 5, 2005 I'm looking to upgrade a pair of Forte II's, what is the cost for your networks popbumper if i my ask Gary Quote Link to comment Share on other sites More sharing options...
popbumper Posted December 6, 2005 Share Posted December 6, 2005 Garster: Thanks for asking, my price sheet is at home, I will get back with you later today. Chris Quote Link to comment Share on other sites More sharing options...
popbumper Posted December 6, 2005 Share Posted December 6, 2005 Gary: I just emailed you with the cost of the Forte II networks, please let me know if you are interested, thanks! Chris Quote Link to comment Share on other sites More sharing options...
honch Posted January 14, 2006 Share Posted January 14, 2006 Chris, Could you email me the cost sheet for Forte II x-over mod. Thanks Bob Quote Link to comment Share on other sites More sharing options...
travisc Posted January 14, 2006 Share Posted January 14, 2006 Honch, welcome buddy those crossovers posted on page one were built for me, I sold them and the speakers to another forum member. Those crossovers are worth every cent and really not very pricey. I suggest e-mailing Chris, though he may lurk I dont see him around as frequently lately. Quote Link to comment Share on other sites More sharing options...
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