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72.17.180.158
When running resistors in parallel what is correct formula to achieve your final value.
Thanks in advance
Follow Ups:
1/Rt = 1/R1 + 1/R2 + 1/R3 + 1/Rn
Or a quickie if you have only 2 resistors:
Rt = (R1*R2)/ (R1+R2)
Thanks, quick question in a speaker crossover do the two resistors in parallel need to be of similiar value IE: is it okat to use a 68.8 ohm and a 38.4 ohm to replace a 23 ohm resistor or do the values need to be closer to each other. Thanks again.
It's best to use the same value when running resistors in series or parallel. Unequal R's causes one to heat more than the other. Depending on load this will cause thermal drift effectively changing the value.
68.8 and 38.4 in parallel equals 24.645. If that's OK in your circuit then its fine. You can try other values with the on-line calculator at
Thanks, it is a 68.1 not 68.8 my typo. Thanks again for the info. I am rebuilding an Infinite Slope crossover in a JSE 1 and I have been told resistor values are really critical.
Ron
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