swayzeeee Posted March 20, 2019 Report Share Posted March 20, 2019 I came upon a pair of AR-3a's in need of some TLC at a price I couldn't resist. I'm following the restoration guide closely and am in the process of trying to clean up the pots, which are quite corroded. As long as I have them open, I figure I'll replace the crossover capacitors as well. I see that each speaker would take a 150uF, 50uF and 6uF capacitor. Looking at metalized polypropylene crossover capacitors at Parts Express, first off, they don't carry a 150uF. I guess I could wire a 100 and a 50 in parallel, or even three 50s... but when I add up the costs, it's around $65 per speaker. (That's four 50's @ $15/each + $5 for a 6.2u). Yikes. NPE's would only cost about $5 per speaker. I've read that the polypropylenes will last longer. Outside of that, is there any other justification for the added expense? Would they sound noticeably better? I'm strongly leaning toward the NPEs... is there any reason I would regret going the el cheapo route later... in, say, the next 20 years? Quote Link to comment Share on other sites More sharing options...
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