clevor393 Posted November 14, 2007 Share Posted November 14, 2007 I have had these speakers forever, they are not the newer KP 250 but the old ones. I have cooked the cossovers in the subs (KP 115) a few times and had to replace the med drivers in the KP 250 once. I just re-caped the whole network with bigger and better caps and replaced a med driver again....but I am still not happy with the sound ...the med horns are way louder than the rest and I have to eq the snot out of them just to listen to them. Nothing has changed the horns are still way to loud they always have been even before the re-cap. some pics KP 2.5 B network Before................................................................................................After Kp 115 before Kp 115 after Is it possable the network calls for a 16ohm med driver and Klipsch sent me an 8ohm driver making it way to loud. Thanks for all your help....Steve. Quote Link to comment Share on other sites More sharing options...
DrWho Posted November 15, 2007 Share Posted November 15, 2007 Does your new crossover have an autoformer? I don't see one in the pic. You could always just put the mid onto a lower tap. Quote Link to comment Share on other sites More sharing options...
clevor393 Posted November 15, 2007 Author Share Posted November 15, 2007 Does your new crossover have an autoformer? I don't see one in the pic. You could always just put the mid onto a lower tap. I have no idea what you are talking about. Autoformer??? Lower Tap???? All I did was replace the caps..... Thanks Quote Link to comment Share on other sites More sharing options...
BEC Posted November 15, 2007 Share Posted November 15, 2007 KP-250 network schematic. Bob Crites Quote Link to comment Share on other sites More sharing options...
clevor393 Posted November 15, 2007 Author Share Posted November 15, 2007 So what am I missing. I have that same schematic.....Like I said all I did was replace the caps. is there something missing? Quote Link to comment Share on other sites More sharing options...
clevor393 Posted November 15, 2007 Author Share Posted November 15, 2007 it has an autoformer ...I think... Quote Link to comment Share on other sites More sharing options...
BEC Posted November 15, 2007 Share Posted November 15, 2007 The device labeled T9A on the schematic is the autotransformer. It attenuates the midrange by 3db. The T9A only has one tap. Bob Quote Link to comment Share on other sites More sharing options...
clevor393 Posted November 15, 2007 Author Share Posted November 15, 2007 ok I'm starting to get it. I see it in the pic, it has three connections on it..1 input, 2. 3db to the mid horn and then whatever the third one does to the tweeter. ok I have that, could that be the problem? How do I test it? and could I have gotten 8 ohm replacement drivers for a 16 ohm setup......would that make it louder. is this setup 16 or 8 ohms??? Sorry for all the ?'s and I thank you all for your time and knowledge. Quote Link to comment Share on other sites More sharing options...
BEC Posted November 15, 2007 Share Posted November 15, 2007 If you did get an 8 ohm driver and it was supposed to be a 16 ohm driver, yes, that would be 3 db louder. If that is the case, you could replace the autotransformer with another one that had a 6 db attenuation tap to get back right again. Bob Crites Quote Link to comment Share on other sites More sharing options...
clevor393 Posted November 15, 2007 Author Share Posted November 15, 2007 something like this work...if I needed it.... http://cgi.ebay.com/New-Audio-Autotransformer-Pair-Klipsch-Crossover_W0QQitemZ110190740034QQihZ001QQcategoryZ14993QQcmdZViewItem Quote Link to comment Share on other sites More sharing options...
BEC Posted November 15, 2007 Share Posted November 15, 2007 something like this work...if I needed it.... http://cgi.ebay.com/New-Audio-Autotransformer-Pair-Klipsch-Crossover_W0QQitemZ110190740034QQihZ001QQcategoryZ14993QQcmdZViewItem Why, Yes it would. (He said modestly). Bob Crites Quote Link to comment Share on other sites More sharing options...
DrWho Posted November 15, 2007 Share Posted November 15, 2007 I believe Bob has all the autoformers you might need if you wanted to try out something with more attenuation. They work pretty much like L-Pads but aren't sensitive to the impedance of the driver (which means the frequency response stays constant). They do however implement phase shifts, which introduces other design considerations. I think it is 90 degrees for every 3dB? I'm not sure what's up with your speakers always having mids too loud - do you have any means of measuring the performance? I almost wonder if you didn't short a few windings in your woofer VC, thus reducing the Bl (though this is a very rare occurence). I suppose it's possible that your autoformer got burned up too. Anyways, I think measuring the frequency response would help you know what's going on so that you can get right to the root of the problem. It sounds like a more elaborate crossover rebuild is necessary. Quote Link to comment Share on other sites More sharing options...
DrWho Posted November 15, 2007 Share Posted November 15, 2007 Oops, looks like I took too long to write my post. Quote Link to comment Share on other sites More sharing options...
clevor393 Posted November 15, 2007 Author Share Posted November 15, 2007 something like this work...if I needed it.... http://cgi.ebay.com/New-Audio-Autotransformer-Pair-Klipsch-Crossover_W0QQitemZ110190740034QQihZ001QQcategoryZ14993QQcmdZViewItem Why, Yes it would. (He said modestly). Bob Crites Sorry hope i didn't offend anyone........I had no idea you sold this stuff, thats great, I'll get the stuff I need from you. So I am going to test the drivers first, see what I have for ohms.....do you know what they should be? Quote Link to comment Share on other sites More sharing options...
BEC Posted November 15, 2007 Share Posted November 15, 2007 A 16 ohm driver would probably read around 9 to 11 ohms with a meter. An 8 ohm around 6. Bob Crites Quote Link to comment Share on other sites More sharing options...
clevor393 Posted November 15, 2007 Author Share Posted November 15, 2007 Thanks Bob.........the way I look at it is, if I have a 16 ohm driver I can rule out the 8 ohm theory and move on to the next...... again Thanks. Quote Link to comment Share on other sites More sharing options...
clevor393 Posted November 16, 2007 Author Share Posted November 16, 2007 Brought home the Fluke today... 12 " 5.1ohm med 11.4ohm tweeter 7.7ohm does this look normal to you? where do i go next? How can I check the autoformer.... I also brought home my OTC meter, it can test digital freq data, if that means anything to you. I use that for testing some of the Ford MAP sensors..... again Thanks..... I'm going to pull the autoformer...(is that what they call it??) and ohm it. Quote Link to comment Share on other sites More sharing options...
BEC Posted November 16, 2007 Share Posted November 16, 2007 Those driver DCRs are probably about right. OK, to test your autotransformer. I usually just use my spectrum analyzer (since I have one) which reads directly in db to test them. So, for a test you might have the stuff to do, we could try this. Set up the T9A autotransformer after removing it with a resistor (10 ohms would be a good value) connected between terminals 4 and 0. Now connect an audio signal generator (set to 1000 hz) to terminals 0 and 5 and adjust the audio generator to a measured output of 1 volt ac. With that signal applied, measure the voltage across the resistor you connected between 0 and 4. Should read 0.707 volts. Bob Crites Quote Link to comment Share on other sites More sharing options...
clevor393 Posted November 16, 2007 Author Share Posted November 16, 2007 I looked at the autoformers real good and I think they are fine no signs of heat so I think I am going to buy those autoformers from you...and I did buy them..thank you. I have a friend that can test those so I'm going to take a day and visit him. One more ? on the med driver there is a white dot of paint next to one of the terminals ...I always took them for (+) am I ok with this? again thanks..... Quote Link to comment Share on other sites More sharing options...
BEC Posted November 16, 2007 Share Posted November 16, 2007 I think that is correct on the white dot being positive. Bob Quote Link to comment Share on other sites More sharing options...
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