Reggie1349 Posted October 22, 2018 Share Posted October 22, 2018 I am trying to understand the different characteristics between the AL, AA, AL3 crossovers. Can you help? Quote Link to comment Share on other sites More sharing options...
Moderators Travis In Austin Posted October 23, 2018 Moderators Share Posted October 23, 2018 You need @BEC and/or @Deang. Many others have owned many or all of them and can help you compare, and they are going to want to know what speakers you have, drivers, etc. because that makes a lot of difference. Welcome to the Forum. Quote Link to comment Share on other sites More sharing options...
Moderators Travis In Austin Posted October 23, 2018 Moderators Share Posted October 23, 2018 I am also moving this to the Tech/Mids section as that is probably the most appropriate place. Travis Quote Link to comment Share on other sites More sharing options...
Reggie1349 Posted October 23, 2018 Author Share Posted October 23, 2018 Hello, I have a pair of La scala speakers. Quote Link to comment Share on other sites More sharing options...
BEC Posted October 23, 2018 Share Posted October 23, 2018 Of the three types mentioned, the AA, AL and AL-3, the AA is the oldest design and very popular even today. The AL is not considered by most to be a good crossover. It is overly complex and as they age, develop bad solder joints and are rather notorious for blowing tweeters because of bad connections. The AL-3 addressed the voicing problems of the previous AL and AL-2 and is considered by most to be a good crossover. Bob Crites 4 1 Quote Link to comment Share on other sites More sharing options...
Reggie1349 Posted October 24, 2018 Author Share Posted October 24, 2018 Thanks for the info! Quote Link to comment Share on other sites More sharing options...
Dave A Posted October 26, 2018 Share Posted October 26, 2018 Bob, What causes solder joints to go bad? I have seen plenty that were not good but they had continuity. Quote Link to comment Share on other sites More sharing options...
CECAA850 Posted October 26, 2018 Share Posted October 26, 2018 You can have continuity but still not carry current. For example you can have every strand of wire broken but one in a 10 ga wire and it will show continuity but won't light a bulb. Resistance through a solder joint will act the same way. Quote Link to comment Share on other sites More sharing options...
BEC Posted October 26, 2018 Share Posted October 26, 2018 17 hours ago, Dave A said: Bob, What causes solder joints to go bad? I have seen plenty that were not good but they had continuity. We used to discuss this a lot back in the olden days concerning the AL crossovers. Forum Member DJK has a lot of hands on experience with those. Here is what he said is usually the cause of the AL blowing tweeters. I think he suggested in another post that the iron the factory used was too small for some of the joints on the AL. 1 Quote Link to comment Share on other sites More sharing options...
Dave A Posted October 26, 2018 Share Posted October 26, 2018 28 minutes ago, BEC said: think he suggested in another post that the iron the factory used was too small for some of the joints on the AL. That I can believe as a lot of those joints show incomplete solder flow. It is one of the biggest problems in Tig welding too for beginners or those who just don't have the aptitude for welding. Not enough heat causes just as many problems as too much heat. Quote Link to comment Share on other sites More sharing options...
Panelhead Posted October 26, 2018 Share Posted October 26, 2018 From my experience too hot a tip can be compensated with reduced contact time. Too low just results in cooking the components. I use three irons with building. A 40 watt for the big stuff, a 25 watt for normal, and a 12 watt for the delicate items. Always use Kester 63/37 for everything. 2 Quote Link to comment Share on other sites More sharing options...
JohnA Posted October 29, 2018 Share Posted October 29, 2018 The Type ALs I had produced a howling resonance in the middle registers of a French Horn. Ugly. Quote Link to comment Share on other sites More sharing options...
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