SpeedLimit Posted March 21, 2021 Author Share Posted March 21, 2021 So, i am back... i tried many things ... with a second crossover board (see picture with the 2 boards).. The bass is crossed with the original cross of the AL-3 .. sometimes i changed the 136 µF capacitances with 77 µF, with 27 µF, without capacitances. I also tried the different crossovers mustang_flht calculated for me .. With the crossover from mustang_flht, it was better than with the al-3. It is not easy to make crossovers without listening. Thank you mustang_flht for what you have done for me. It is very nice of you. My La Scala clones are decided not to play well for me .. Something is perturbing. I do not know exactly what. At the end, i decided to replace all the old cap of the original Klipsch AL-3 crossover. i have put MKP cap. A little better but not enough to say it was a good idea. I have put 2 klipsch logos on my clones .. i hoped, it would play better with them ... :-)) So, now, i have read and read more times many discussions on this forum that handle around the La Scala and the crossovers. Some of you says that the type A crossover is perhaps one which give the better sound .. Only 6dB/oct slope and it seems to be not tiring to ear Do you think it is a good idea ? I will try to find better capacitances like oil capacitances (i don't know the real name in american : something like oil bath capacitors in metal tank) So i am open to any suggestions ? I am also looking for 2482 jbl diaphragm, because, i have 2 iwata horns for my JBL 2440 drivers but i would prefer to have phenolic diaphragm. I have seen that the 2482 diaphragm could go into the 2440 drivers. Next time i will show you my Iwata 2" horns. 1 Quote Link to comment Share on other sites More sharing options...
ClaudeJ1 Posted March 21, 2021 Share Posted March 21, 2021 On 3/13/2021 at 10:22 AM, SpeedLimit said: Thank you mboxler .. i have Eminence Kappa 15C woofer, Atlas sound PD-5VH squawker, b&c de 10 tweeters and klipsch AL-3 crossover ... and it doesn't sound good .. I do not know why. It seems that there is a hole between woofer and squawker. perhaps the new pd-5vh doesn't play at 450 Hz with the original (genuine) klipsch al-3 crossover. I have put the Kappa 15C in peavey fh-1 cabinet .. these cabinets are very close to la scala ones, a little bit bigger but not too much. It must or should sounds like the La Scala .. I have owned many of those and still do. Great mid bass bins. Quote Link to comment Share on other sites More sharing options...
Marvel Posted March 21, 2021 Share Posted March 21, 2021 The fh-1 is fine. Just a guess (really a guess... it's 4:00 am) but I would try a diffent horn than the one you made. Is the Iwata from AutoTech? Quote Link to comment Share on other sites More sharing options...
SpeedLimit Posted March 21, 2021 Author Share Posted March 21, 2021 The Iwata horns has been made by one of my friends. It is made with slices of plywood I will post pictures as soon as i am back at home 1 Quote Link to comment Share on other sites More sharing options...
mustang_flht Posted March 21, 2021 Share Posted March 21, 2021 If you still have some courage you can try this one I think it is not bad 😎 Connection approximately 460 Hz and 3800 Hz Quote Link to comment Share on other sites More sharing options...
SpeedLimit Posted March 21, 2021 Author Share Posted March 21, 2021 Hello mustang_flht yes, i can try this .. i just have to find 3,9 and 12µF caps .. I can try this while waiting for the arrival of my components to do the filter at 6dB / Oct like that of Bob crites slightly modified (A-4500 with change of the 2μF capacitor by 4 μF and addition of the self of 0, 5 MH in series with squawker) And now some pictures of my Iwata horns 1 Quote Link to comment Share on other sites More sharing options...
Marvel Posted March 21, 2021 Share Posted March 21, 2021 Those are really nice looking horns.I was thinking of the Autotech horns from Poland. This is one of their Iwata horns: 1 Quote Link to comment Share on other sites More sharing options...
mustang_flht Posted March 21, 2021 Share Posted March 21, 2021 4 hours ago, SpeedLimit said: Hello mustang_flht yes, i can try this .. i just have to find 3,9 and 12µF caps .. I can try this while waiting for the arrival of my components to do the filter at 6dB / Oct like that of Bob crites slightly modified (A-4500 with change of the 2μF capacitor by 4 μF and addition of the self of 0, 5 MH in series with squawker) And now some pictures of my Iwata horns Hi @SpeedLimit Afterwards, if you like a sound that is a little soft and not aggressive, I like to dig a little in the upper midrange around 4000 Hz. If you want I can calculate that easily. Quote Link to comment Share on other sites More sharing options...
SpeedLimit Posted March 21, 2021 Author Share Posted March 21, 2021 Yes why not mustang_flht but first, i must find the components needed for your last crossover. I don't have them yet. Quote Link to comment Share on other sites More sharing options...
OO1 Posted March 21, 2021 Share Posted March 21, 2021 1 hour ago, SpeedLimit said: Yes why not mustang_flht but first, i must find the components needed for your last crossover. I don't have them yet. --tweeking an AA is a lot easier than an AL-3 Quote Link to comment Share on other sites More sharing options...
ClaudeJ1 Posted March 21, 2021 Share Posted March 21, 2021 11 hours ago, ClaudeJ1 said: I have owned many of those and still do. Great mid bass bins. Oh, and the best sound I ever got out of them in may small office space in the basement of my house from 2000-2009 was with a square magnet K-33 woofer that I got in purchase/trade from a fellow Khorn owner who badly wanted my pairs of Chorus I and Chorus II surrounds for 7.1. They were replaced in another room with 1/2 dozen Peavey SP-1's, which I called 2-way "cheap Scalas," and much rarer to find used today. The ones in the office had EV-960 horns on top with DH1a drivers Sonic Impact chip amps (as tested by a Klipsch Engineer later on). A Behringer 24/96 Active Xover was feeding a PEQ'd signal to them. Funny thing is that because of ROOM GAIN, those suckers went down to an unbelievable 30 Hz. in that room, which never ceased to amaze me. This is what sold me on room gain in a manner similar to my discovery of the low bass that could be had from my Super Heresy 1 Modifications later on. Quote Link to comment Share on other sites More sharing options...
mustang_flht Posted March 21, 2021 Share Posted March 21, 2021 And here is a soft version, the hole of 3db approximately between 2KHz and 7kHz is voluntary. if it is too much we can calculate an intermediate version, A soft version with your 14µF to avoid looking for a 12µF, This is my favorite for testing 👍 Quote Link to comment Share on other sites More sharing options...
SpeedLimit Posted March 21, 2021 Author Share Posted March 21, 2021 I am dizzy. Some say to me to prefer the type A, others the type AA, I do not know anymore. If I read the Alkeng site, he says something else. I am not far from stopping everything and sell everything in spare parts. Quote Link to comment Share on other sites More sharing options...
SpeedLimit Posted March 23, 2021 Author Share Posted March 23, 2021 I have ordered 2,7 mH inductances (to make 2,5 mH after removing some rounds of wire), 13 µF (10 + 3) oil cap, 4µF oil cap, 2 inductances 0,5 mH, 2 transformers 3619 and 2 oil caps 2µF. Someone said me that oil caps are better with horn drivers, smoother. So i will be able to make type A or type AA crossovers. I just have to wait that the items arrive to my far island. Meanwhile, i will try (if i find the components) the crossover mustang_flht calculate for me. 1 Quote Link to comment Share on other sites More sharing options...
SpeedLimit Posted March 29, 2021 Author Share Posted March 29, 2021 Hello mustang_flht if i can ask you ... can you (using your software) say me what would be the response with my speakers with the Type A or AA crossover ? I am waiting for my ordered items (capacitances , inductances and autotransformer t2a) to build one of these crossovers. I think perhaps i will have to add an attenuation on the tweeter because it has more efficiency (sensitivity than the EV T35a). I show you 3 diagrams of cross. One is the type A, the other the AA and a variant of them. Quote Link to comment Share on other sites More sharing options...
mustang_flht Posted March 29, 2021 Share Posted March 29, 2021 Hi, Ok, I'm looking tomorrow. The only unknown is that I miss the characteristics of the T2A tranfo, in particular the mH. Okay, I'll find and simulate these filters. Quote Link to comment Share on other sites More sharing options...
SpeedLimit Posted March 30, 2021 Author Share Posted March 30, 2021 Thank you mustang_flht. i will get in a few days the 3619 transfo (the same that Crites sells) .. it seems to be like the T2A. Quote Link to comment Share on other sites More sharing options...
SpeedLimit Posted March 30, 2021 Author Share Posted March 30, 2021 and i forgot to say that I will also receive 2.7 mH self-windings (inductance) on which I will remove some wire windings to bring them back to 2.5 mH Quote Link to comment Share on other sites More sharing options...
Wirrunna Posted March 30, 2021 Share Posted March 30, 2021 Here is the T2A spec sheet 1 Quote Link to comment Share on other sites More sharing options...
mboxler Posted March 30, 2021 Share Posted March 30, 2021 15 hours ago, mustang_flht said: Hi, Ok, I'm looking tomorrow. The only unknown is that I miss the characteristics of the T2A tranfo, in particular the mH. Okay, I'll find and simulate these filters. I have always based my simulation (LTSpice) on an old post from Bob Crites (RIP). He measured 6.6mH across taps 4-5 of a 3619. Since those taps should equal 29.3% of the total windings, then I came up with 38.38mH across taps 0-4, and 76.76mH across taps 0-5. You probably should recheck my findings 🙂. Mike 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.