so I want to replace the polypro cap (250V rated) with a one that's rated 160V. I've seen other caps (electrolytic) in the crossover and those are rated 100V so I guess that's ok. right?
thanks
thanks
No problem. poly caps are often 250V because in some cases it is cheaper to get higher rated caps than lower, since the higher rated ones are produced in higher quantities.
And for science, to push beyond 100 V AC then you would need to push a lot of power through that crossover. If we are generous and assume that the cap rating is DC so we divide 100 V by 1.41 and calculate max power given a nominal resistance then we get:
4 Ω: 1200 W
8 Ω: 600 W
16 Ω: 300 W
Even the inefficient speakers are usually at least 87 dB / w @ 1m. 200 W would net 110 dB, which is a lot. I think you will be fine 🙂
And for science, to push beyond 100 V AC then you would need to push a lot of power through that crossover. If we are generous and assume that the cap rating is DC so we divide 100 V by 1.41 and calculate max power given a nominal resistance then we get:
4 Ω: 1200 W
8 Ω: 600 W
16 Ω: 300 W
Even the inefficient speakers are usually at least 87 dB / w @ 1m. 200 W would net 110 dB, which is a lot. I think you will be fine 🙂
Reasonable, and in this case likely fine as already said... There may be other cases where one component is not rated to survive in other parts of the same circuit. Normally you'd choose to measure to be sure.
Problem with polyprop caps voltage rating is that it goes down radically with frequency. But most music do also