Speaker crossover mod. Your advice?
Bryon, help us help you by tracing a schematic diagram of all sections of the x-over. It's really easy to tell you to replace all the film caps with other expensive film caps, but that does no one except the cap seller any good. If you think that's beyond your capability, get someone else to do it. I find it easier to start with the output sections, not the inputs. Since the output wires are clearly labeled, you have a head-start on the project. . |
You can try another (more expensive ) cap as long as it has the same value and has the appropriate voltage of the focal one . More expensive isnt always much better though and ive tried a lot believe me , duelund being the rolls royce of caps. If you dont replace the same value you will change the intendid balance of the speaker. I dont think there will be any manufacturer guarantee either. mundorf is also good stuff , i use a silver / oil at the moment with the diamond tweeter . |
I have created schematics for the crossover. It was tricky at first, but easy after I got the hang of it. Here they are: TWEETER MIDRANGE WOOFERS The following are the values of the caps and resistors for the various drivers, as labelled on the components: TWEETER C1 = 3.6J 250V C2 = 6.8J 250V R1 = 7W 5.6Ω JF MIDRANGE C3 = 56µF 63V C4 = 12µF 63V C5 = 4.7J 250V R2 = 10W 6.8Ω JF R3 = 10W 2.4Ω JF WOOFERS C6 = 220µF 63V C7 = 440µF 63V R4A = 10W 20Ω JF R4B = 10W 20Ω JF R4C = 10W 20Ω JF What's next? Bryon |
Byron, There is another thread on Audiogon which might be of interest to you, "Capacitor log Mundorf Silver in Oil." It's a long thread but it logs the journey of several members who ended up with Duelund Cast crossover components. Those are very expensive components and I am not recommending them for your project just simply because for your crossover the cost would be huge. However, that thread does contain a lot of their impressions of other components they tried along the way. I was going to suggest Mundorf Supreme as a good capacitor, but upon reading the large values you have in your speaker, I'm not sure what to recommend. I am doing another speaker project and plan to use Clarity MR caps, Duelund Cast resistors, and North Creek 10awg or 12awg inductors, but I don't have nearly as many components as you, nor such high values. What are you planning to do with the inductors, and are you going outboard with your crossover? John |
