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EdSomehow I managed to post the above list before I was able to edit it. It is a list of what I think I need in crossover parts. Hopefully it is legible. If not I can repost. Am I close?ThanksPeter
Hi EdThanks for the heads up. (Q) I just placed an order with the electrolytics. I read a lot of conflicting opinions regarding the them. What sticks in my mind most is that the tolerances can be way off. Do you have any qualms about using them? (A) Not in this application. I actually bought both and really didn't hear any discernible differences with this crossover, though it can be quite clear in other apps. Regarding their tolerance, perhaps I got lucky in the pairs I was sent, but here too I didn't detect any variances from side to side. Another slight advantage with the electrolytics is their size; they will fit neatly on the crossover board and allow the overall assembly to be smaller. You can always start with the electrolytics and upgrade if you feel improvements can be realized, but I really didn't hear much difference. (Q) Also, is the layout using the 8 ohm resistor (R3?) (+ _ L2 _ C2 _ R3 +)? Are you siliconeing your parts to the board or just using wire ties? I suppose the resistors should stand proud of the board slightly for cooling. I see that some like to eliminate any connection that is not a point to point solder connection. I'm thinking about using some barrier terminals at the inputs and then outputs to the speakers.(A) I'm not quite sure what you are asking regarding the layout of the 8 ohm resistor? I used hot glue to secure the components and prevent them from vibrating. Less of a PITA than silicone if you want to reconfigure later. Heat should not be much of a factor, as all three top drivers are very efficient and basically comprise the midrange on up in the SL. They will likely see minimal wattage. You will find that the only driver that gets a bit of a workout will be the LF (Usher). If I touch any of the resistors after hours of play time, they are no warmer than any other component on the board. I used terminals as a matter of convenience but agree that anything you can do to minimize the signal path is a good thing. You may even want to consider three separate boards, which could then be placed in proximity to their drivers, or arranged strategically on the inside rear wings (where a single large board might not fit). (Q) I still have quite a way to go, but I thought I would make up the crossover layout before I start gluing the bottom structure together. Hopefully that will lessen the chance of any unwanted surprises.(A) Always a good idea. When you actually wire them up, be sure to listen to each driver individually post crossover, and also be sure to check the phase relationship between drivers. I've made this mistake and find that a test cd, with signals recorded both in and out of phase can be very helpful here. This is especially true in OB, since the rear wave summed with the front wave can sometimes alter the perceived phase relationship at the listening position, even when the drivers are physically wired in phase. If you experience this, sometimes even minute adjustments in distance to any reflective surfaces can correct this. Thanks,Peter
Thanks EdIs this the layout for the midrange crossover? I erased the P1.
OB-sound is kind of joke
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