absolve2525 Posted January 12, 2018 Share Posted January 12, 2018 I recently picked up a pair of Lascalas with these crossovers. Stamp dated 1988 underneath. I tested the electrolytic caps, and they measure fine. I was looking at the crossover diagrams on the main page, and these appear to be the same as AK3 but without a protection diode on the tweeter? If so, they should sound pretty good? Im still trying to figure out how all of these crossovers compare. Are AL crossovers interchangeable with AK crossovers? I have 89 KHorns that came with AK2. Those are split, with woofer crossover parts in the KHorn bass bin. I bought Crites AK 4500 for those, but picked up some AA with oil caps last last year too. It's my understanding that the AK2 cut the midrange more to accommodate the EV K55m. Which drivers were standard for use with the AL2? Thanks guys! Quote Link to comment Share on other sites More sharing options...
jimjimbo Posted January 12, 2018 Share Posted January 12, 2018 27 minutes ago, absolve2525 said: I tested the electrolytic caps, and they measure fine What did you measure? Their stated values, or ESR? And if you measured ESR, what do you consider "fine"? Quote Link to comment Share on other sites More sharing options...
absolve2525 Posted January 12, 2018 Author Share Posted January 12, 2018 I measured their capacitance. I would just replace them anyhow, I have new caps on hand. Anyway... Quote Link to comment Share on other sites More sharing options...
Deang Posted January 12, 2018 Share Posted January 12, 2018 AL-2 was built for the K-55-M, and I believe they are 6dB down instead of 3dB down. I would recap and listen to them for a week or two. Quote Link to comment Share on other sites More sharing options...
absolve2525 Posted January 13, 2018 Author Share Posted January 13, 2018 Thanks for the info! Strangely, these came with round magnet alnico K77 and K55V not M. Apparently, some blown parts were replaced at some point. One midrange is solder-type, the other is push-type. I was able to find replacements on here from another member, so I will have alnico K77 and a pair of solder type midrange drivers. Would AA be a better match for these drivers? My 89 Khorns came with EV "M" drivers, and AK 2 crossovers. If I swapped out the AK2 for AL 2, what should I expect? Thanks! Quote Link to comment Share on other sites More sharing options...
Deang Posted January 13, 2018 Share Posted January 13, 2018 With those components, the AA is the "right" network. "If I swapped out the AK2 for AL 2, what should I expect?" That half of the AK2 network would be in your Klipschorn bass bin. Quote Link to comment Share on other sites More sharing options...
absolve2525 Posted January 13, 2018 Author Share Posted January 13, 2018 I understand that the woofer bass bin contains the woofer crossover. I had to bypass it in order to use Crites A/4500 crossovers. Thanks Quote Link to comment Share on other sites More sharing options...
Deang Posted January 13, 2018 Share Posted January 13, 2018 I guess I just didn't understand the question then -- why would you want to run a LaScala network in a Klipschorn, or visa-versa? Quote Link to comment Share on other sites More sharing options...
JohnA Posted January 13, 2018 Share Posted January 13, 2018 I don't have an AL-2 schematic, but based on the other, similar crossovers, an AK-2 should work just fine in a La Scala. The crossover points and response contouring will be a little different, but it should not be different enough to sound bad. For your current configuration, Type AA would sound better. The K-77-M is a better tweeter. A B&C DE120 on a Fastrac tractrix tweeter horn is an even better tweeter and it *could* be crossed as low as 2k, but 5k would be better. 1 Quote Link to comment Share on other sites More sharing options...
Deang Posted January 13, 2018 Share Posted January 13, 2018 In the low pass: AK-2 uses 4mh/140uf AL-2 uses 4mh/136uf basically identical In the midrange: AK-2 uses T5A/-6dB and 4mh in parallel with the K-55-M AL-2 uses T4A/-4dB and 5mh in parallel with the K-55-M Tweeter sections are identical I would imagine the midrange sections to sound quite different. Interesting. 1 Quote Link to comment Share on other sites More sharing options...
absolve2525 Posted January 13, 2018 Author Share Posted January 13, 2018 1 hour ago, Deang said: I guess I just didn't understand the question then -- why would you want to run a LaScala network in a Klipschorn, or visa-versa? I was trying to get a grasp of the differences between the crossover types and what is suitable for a Khorn vs LaScala. AL2 vs AK2 vs AA. You can use an AA in either, right? I figured you could do the same with the others. If there is special contouring involved for respective model, then that makes sense. Thanks! 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.