BEC Posted March 19, 2006 Share Posted March 19, 2006 Chops, I personally like how the CT125 sounds producing the 4500 to 6000 range better than the K-55/K-400 producing that range. In fact, what the CT125 does with music in the lower part of its range was the first thing that attracted me to that driver. By the way, the same mod works on the Type B crossover. That has also been done. Bob Crites Quote Link to comment Share on other sites More sharing options...
Deang Posted March 19, 2006 Share Posted March 19, 2006 I've been playing with the crossover points and that tweeter off and on for the last two weeks -- I agree with Bob, but with this caveat: If anyone is even remotely considering moving away from the K-400/401 at some point in time -- stay at 6kHz. Quote Link to comment Share on other sites More sharing options...
bhendrix Posted March 19, 2006 Share Posted March 19, 2006 "If anyone is even remotely considering moving away from the K-400/401 at some point in time -- stay at 6kHz." Why do you say this, Dean?? Quote Link to comment Share on other sites More sharing options...
m8o Posted March 19, 2006 Share Posted March 19, 2006 I'm confused. [8-)] [*-)] Both the La Scala and KHorn specs on this Klipsch site, cite 4.5KHz as the crossover between the K77F and K55X... Is this not the case, or not the case with 'older' [pre-AL#] networks and I'm just too much of the neophite to know the context of this discussion [:$]? Quote Link to comment Share on other sites More sharing options...
BEC Posted March 19, 2006 Share Posted March 19, 2006 The 4500 crossover point is only on the AK/AL-4 crossovers. Not on any of the earlier ones. Bob Crites Quote Link to comment Share on other sites More sharing options...
Deang Posted March 20, 2006 Share Posted March 20, 2006 Focusing on the actual supposed transition points between the different networks is a waste of time -- it doesn't have near the impact on the acoustic response (sound) as the actual slopes and filter type. Quote Link to comment Share on other sites More sharing options...
Erik Mandaville Posted March 20, 2006 Share Posted March 20, 2006 Al: First, great work. It was also observed that, "The mod Bob suggests is crude, but it works." I understand what you are saying, but I agree that it works -- in fact quite well IMO. I tried the CT125 with both my own rebuilt type 'A' network, as well as with the one he outlined above. It seems many things have areas of subjective improvement, although I know what you are proposing has electrical elements that may be better for the equipment in term of electrical interaction and behaviour. Whether those factors would directly translate into audible improvements would be the subjective part of the equation. I agree that the new tweeters sound less hissssssy, which is something I noticed when listening for a couple of days strictly in stereo. I think this is one of their attributes that lends more realism to percussion sounds and cymbals. I hear more metal, and less hiss. The modified network with 4uf on the tweeter and series coil on the squawker are very smooth sounding, and I think the improvement here may be as much in the midrange as in the tweeter. Together, it sounds quite good IMO. Again, thanks for sharing this. Erik Quote Link to comment Share on other sites More sharing options...
Deang Posted March 20, 2006 Share Posted March 20, 2006 Might this be a first? No, we agree on the TEAC too -- so this is two. Whoa. Quote Link to comment Share on other sites More sharing options...
Daddy Dee Posted March 20, 2006 Share Posted March 20, 2006 I think Erik's observation on the 4500hz mod is right on the money. The benefit is derived as much from the squawker as the tweeter. Quote Link to comment Share on other sites More sharing options...
Erik Mandaville Posted March 21, 2006 Share Posted March 21, 2006 Dean: "Might this be a first? No, we agree on the TEAC too -- so this is two. Whoa." I bet there were at least three points of common ground over these past years! Erik Quote Link to comment Share on other sites More sharing options...
Daddy Dee Posted March 21, 2006 Share Posted March 21, 2006 For any newbies who might be lurking... I have gotten excellent advice from both of these guys. For the things, in which they acknowledge agreement with such good humor... my best advice would be: BUY the stock. Quote Link to comment Share on other sites More sharing options...
marting Posted March 22, 2006 Share Posted March 22, 2006 Just a question on the value of that inductor to roll off the top of the midrange. Is 500uH the same as .5mH? I thought that was right and ordered these: http://www.partsexpress.com/pe/pshowdetl.cfm?&DID=7&Partnumber=255-230&CFID=65390&CFTOKEN=74875329 Did I get the right thing? Martin. Quote Link to comment Share on other sites More sharing options...
BEC Posted March 22, 2006 Share Posted March 22, 2006 Martin, Yes, that one should be all right. Be sure to locate it as far away from any metal on the crossover as possible since the value of that air core inductor would be effected by any metal close to it. Bob Quote Link to comment Share on other sites More sharing options...
jwc Posted March 22, 2006 Share Posted March 22, 2006 Bob, do you see any reason to try this mod (lowering XO point) on the Cornwall. I'm not even sure you have a K600 laying around to test the improvement. The reason I ask is two fold. 1. We Cornscala fans may want to try such a mod. 2. I believe there are several folks out there with Cornwalls that have purchased your tweeters. Quote Link to comment Share on other sites More sharing options...
BEC Posted March 22, 2006 Share Posted March 22, 2006 jc, There are some out there who have done that mod with a Cornwall. I haven't seen any results posted yet, but I think it would be the way to go with a Cornwall also. I do like the mod on a Cornscala. By the way, I now have a very special inductor that UT has made for me to use in this mod. DCR or 0.08 ohms and a Q of 31 at 1 khz. Bob Quote Link to comment Share on other sites More sharing options...
Cut-Throat Posted March 23, 2006 Share Posted March 23, 2006 Martin, Yes, that one should be all right. Be sure to locate it as far away from any metal on the crossover as possible since the value of that air core inductor would be effected by any metal close to it. Bob What would be a minimum distance from inductor to metal? By metal I'm assuming you mean Cap Cans, T2A's? Quote Link to comment Share on other sites More sharing options...
BEC Posted March 23, 2006 Share Posted March 23, 2006 I don't know the answer to that for every case. If using an air core inductor I would want to measure inductance while placing it. Probably an inch is adequate clearance. Bob Quote Link to comment Share on other sites More sharing options...
3dzapper Posted March 23, 2006 Share Posted March 23, 2006 The horns too Kevin. Rick Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.