paully Posted October 3, 2007 Share Posted October 3, 2007 I have decided to go ahead and move the crossover onto an outboard crossover and put in new capacitors. For the moment I am going to just use Solen and try boutique caps later. I will use screw down terminals so I can swap capacitors in and out. But I wanted to check some things. How hard is it to get the crossover out? Apparently it is inside the speaker on the back of the piece with the speaker terminals. I can see that I can just unscrew it but is the piece of metal glued to the speaker or does it just come out? Am I going to damage anything when removing it? How hard is it to get the other items off of the actual crossover that I want to save such as the transformer, inductors, etc Those appear to be glued on from the picture I have seen and I dont want to replace those if I can save them but wonder how much heat I need to put into it to get the glue to liquefy. Anyone who has done this with a Chorus or Forte I would appreciate some pointers before I destroy anything. Quote Link to comment Share on other sites More sharing options...
popbumper Posted October 3, 2007 Share Posted October 3, 2007 Paully: 1) Remove screws that hold the terminal cup to the cabinet 2) Gently pull the terminal cup out. The crossover is a double stacked PCB that is fastened to the terminal cup with 4 screws AND two solder connections; the autoformer sits right beside the PCB. 3) The screws are easy to remove, but the board is soldered to the binding posts; you MUST de-solder the posts and get them loose from the board; it's not a simple task, there is little room to maneuver a soldering iron, and the solder is thick. 4) With the board loose, you can access the components (oops - don't forget that the autoformer must be unscrewed too, so it can move). Now you have the board combo and an autoformer, and you must determine how to best mount it to another platform. You'll also need to figure out which components have the easiest access, what component sizes you will need to fit the existing boards, and then desolder/resolder everything. 5) Then, you need to figure out how you will interface the crossover board to the terminal cup - and how you will get three pairs of wires into the cabinet with the crossover outboard. Not an easy task. That's it in a nutshell. Or, you could simply purchase a ready made replacement crossover (like my K-stack), and send me the terminal cup to modify and prewire so you could avoid all the other things you'll have to do. Then, you can be amazed at the difference it makes, and join others who are enjoying the same result. Yes, that's a shameless plug - write me if you need more info - but seriously, the Chorus terminal cup and network setup is a nightmare compared to the Forte (or others), and your plan will be very difficult to pull off. I'm not saying it can't be done, or you can't do it, but it's not a simple, straightforward rework, and I would not recommend it to a first time upgrader. Your actual mileage may vary. Hope this helps to at least give you an idea of what would be involved. Chris Quote Link to comment Share on other sites More sharing options...
Audio Flynn Posted October 4, 2007 Share Posted October 4, 2007 the Chorus terminal cup and network setup is a nightmare compared tothe Forte (or others), and your plan will be very difficult to pulloff. I'm not saying it can't be done, or you can't do it, but it's nota simple, straightforward rework, and I would not recommend it to afirst time upgrader. ======================= Agreed That is why I waited to respond. It could be too much consternation for a novice solder slinger. I am poor at soldering when I have enough room let alone this crowded condition. Quote Link to comment Share on other sites More sharing options...
paully Posted October 4, 2007 Author Share Posted October 4, 2007 It does help and I appreciate it. I haven't done a crossover though I have built multiple amps and preamps. I will also have an electrical engineer here to help me out with the build who has been doing this sort of thing for 30 years. I will forward what you have written to him and then decide if it is really something I want to tackle. I will let you know if I decide not to rick screwing it up as I want to improve the sound not break my new speakers. Quote Link to comment Share on other sites More sharing options...
popbumper Posted October 4, 2007 Share Posted October 4, 2007 Looks like you have a support system to start with, good luck, and if you need any other assistance, be glad to help. Chris Quote Link to comment Share on other sites More sharing options...
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