mboxler Posted December 29, 2021 Share Posted December 29, 2021 I'm building new AK-3's to replace my original AK-2 crossovers. Willing to spend up to $70 shipped. If none available in a week or two I'll just go with the Crite 3636's I already have. Thanks, Mike Quote Link to comment Share on other sites More sharing options...
OO1 Posted December 29, 2021 Share Posted December 29, 2021 59 minutes ago, mboxler said: just go with the 3636's perfect option Quote Link to comment Share on other sites More sharing options...
mboxler Posted December 29, 2021 Author Share Posted December 29, 2021 2 hours ago, RandyH001 said: perfect option Or is it... As I understand it, Klipsch developed the AK-3 to correct a phase issue with the AK-2. I assume the 5mh value was chosen so that it, in parallel with the inductance across taps 0-3 of a T4A, corrected the K-55M portion of that issue. My 3636's measure around 19mh across taps 0-3. This, in parallel with a 5mh inductor equates to almost 4mh across the K-55M. I don't know the inductance across taps 0-3 on the T4A. If it's 10mh, then the parallel inductance would be 3.3mh. If the inductance across taps 0-3 on the T4A is around 10mh, then perhaps I should use a 4mh inductor across taps 0-3 of the 3636 to get to the same 3.3mh parallel inductance? Quote Link to comment Share on other sites More sharing options...
OO1 Posted December 29, 2021 Share Posted December 29, 2021 19 minutes ago, mboxler said: Or is it.. The 3619 was discontinued ........next option is the 3654 or 3636 you can always reach out to @JEM Performance being they are the klipsch crossover repair center , they may still carry the T4A as new or used Quote Link to comment Share on other sites More sharing options...
Toz Posted December 31, 2021 Share Posted December 31, 2021 "Phase issue"? The mid level is 2db higher on the AK3 if I'm remembering right. Quote Link to comment Share on other sites More sharing options...
mboxler Posted December 31, 2021 Author Share Posted December 31, 2021 2 hours ago, Toz said: "Phase issue"? The mid level is 2db higher on the AK3 if I'm remembering right. Oct 1989: The AK-3 network was introduced to correct for a shift in the output of the K-55-M mid-range driver. I assume that meant phase shift, but maybe not??? It's only 1 db higher, but the woofer capacitor and squawker inductor were changed as well. Quote Link to comment Share on other sites More sharing options...
Toz Posted December 31, 2021 Share Posted December 31, 2021 I remember reading here at some point that the EV M driver didn't live up to the published efficiency that was used when designing the AK-2 network. The result was a recessed midrange. I've used both networks in my K-horns. I prefer the AK-2 network with it's knocked back midrange. I also padded down the K77 slightly to better match the K55M. I did keep the 100uF on the K33. Personally, I think the AK-2 gets a bad rap due to people repeating what others say. I will say that my experience with both networks is that there is not a night and day difference. Room acoustics and associated equipment may play an equal or greater role. 1 Quote Link to comment Share on other sites More sharing options...
Deang Posted January 1, 2022 Share Posted January 1, 2022 Comments regarding like drivers and networks are always all over the map. The list of variables for this runs off the page. I have heard several stories from reputable people regarding the AK-2/AK-3 "issue". Notice that the only difference between the AK and AK-3 is the woofer capacitor value (100uF vs. 140uF). Other than that, the networks are identical. Quote Link to comment Share on other sites More sharing options...
OO1 Posted January 1, 2022 Share Posted January 1, 2022 15 minutes ago, Crankysoldermeister said: the only difference between the AK and AK-3 I guess you mean AK-2 ,,,and AK-3 Quote Link to comment Share on other sites More sharing options...
Deang Posted January 1, 2022 Share Posted January 1, 2022 Nope. AK and AK3. Quote Link to comment Share on other sites More sharing options...
mboxler Posted January 5, 2022 Author Share Posted January 5, 2022 Stumbled across an old thread where Bob Crites posted several autoformer PDF's. The T4A was one of them, so I now know the specs. https://community.klipsch.com/index.php?/topic/87280-heresy-ii-crossover-schematic-cleaned-up/ 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.