djk Posted May 20, 2015 Share Posted May 20, 2015 The KP450 has a network for the DH1506, it has two T2A autoformers. I might try a titanium diaphragm first though. Quote Link to comment Share on other sites More sharing options...
avguytx Posted May 20, 2015 Share Posted May 20, 2015 If you can afford to do it, do it. replace the capacitors first, and after a week or so, go after the resistors. Then you can sit in the chair and spend an evening telling yourself that it's placebo. You know, I might just do that, in exactly that way. I've spent months making one little change at a time, and listening to each of the differences in sound (if any) just for the sport of it. I try to be brutally honest with myself, but sometimes I'm just not sure what I'm hearing. I'll leave it to others to tell me its a placebo. (and they might be right!) Me personally, if I'm going to that trouble to the trouble of separating two boards from the terminal cup crossover, I'd go ahead and replace the resistors and caps at the same time. There's less chance of messing something up doing it once and, with larger caps going in place of stock caps, it would be easier to plan out and do at one shot. But that's just me. 1 Quote Link to comment Share on other sites More sharing options...
fmorelli Posted May 20, 2015 Author Share Posted May 20, 2015 I personally prefer this approach, likely because I have way to many projects and I like to finish what I start (it's easy to start a project. It's those that finish ...). On the other hand, for those that like to be studious and turn the crank to understand the bennies incrementally, I appreciate the step-by-step approach. But yes, if I end up doing this, I'll choose what mods to make, fire up the effort with a head of steam and drive it home. If the XO's come apart I suspect a complete rebuild is not a bad idea (I'm already in there with things apart). Hence why I was wondering if there was a parts list. Looks like that's going to need to be made. Filippo Quote Link to comment Share on other sites More sharing options...
wvu80 Posted May 21, 2015 Share Posted May 21, 2015 (edited) The KP450 has a network for the DH1506, it has two T2A autoformers. The CF-3 XO has a single T4A. I am compressing my pics, so this is a test to see if there is high enough resolution. These started at 3 MB each, the first one is low res, the second is med res. Let me know which works best for these posts. I'm thinking the second one at 272 kb. This pic is of the bottom level, the HF XO. FYI there is yet another cap below this which you can't see in this pic. I'll detail it later. Edited May 21, 2015 by wvu80 Quote Link to comment Share on other sites More sharing options...
CECAA850 Posted May 21, 2015 Share Posted May 21, 2015 I can't open the second one for some reason. Quote Link to comment Share on other sites More sharing options...
wvu80 Posted May 21, 2015 Share Posted May 21, 2015 (edited) I can't open the second one for some reason. You're too quick on the trigger. I took the 2nd one down and re-posted to get the one I wanted in there. I just tried it and it works now. If it doesn't open, try refreshing the browser. <Ctrl><F5> Edited May 21, 2015 by wvu80 Quote Link to comment Share on other sites More sharing options...
CECAA850 Posted May 21, 2015 Share Posted May 21, 2015 Works fine now. 1 Quote Link to comment Share on other sites More sharing options...
wvu80 Posted May 21, 2015 Share Posted May 21, 2015 (edited) Klipsch CF-3 B HF section (bottom of XO assembly) Top of Printed Circuit (PC) board Closeup of capacitors Reverse of PC Edited May 21, 2015 by wvu80 Quote Link to comment Share on other sites More sharing options...
wvu80 Posted May 21, 2015 Share Posted May 21, 2015 Klipsch CF-3 B HF section (Top of XO assembly) Note: The value in the schematic is 150V, the pic shows 40uF 100V and 25uF 100V Reverse of the HF PC board Quote Link to comment Share on other sites More sharing options...
red1302 Posted May 21, 2015 Share Posted May 21, 2015 WV80, thank you for the images of the CF-3 boards. John 1 Quote Link to comment Share on other sites More sharing options...
moray james Posted May 21, 2015 Share Posted May 21, 2015 had this on file Klipsch CF-4 Schematic.pdf 1 Quote Link to comment Share on other sites More sharing options...
wvu80 Posted May 21, 2015 Share Posted May 21, 2015 had this on file Nice find, Moray! I only gave you one "like" because the computer wouldn't let me give you a hundred! Quote Link to comment Share on other sites More sharing options...
djk Posted May 22, 2015 Share Posted May 22, 2015 "had this on file" Wow, 6dB of boost in the HF! (and the impedance dropping like a rock) Quote Link to comment Share on other sites More sharing options...
wvu80 Posted January 30, 2020 Share Posted January 30, 2020 Bump for CF-4 fans. Quote Link to comment Share on other sites More sharing options...
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