Beside serving as shunt, those resistors also play a role in impedance matching too. If you are lazy, just use the 100K value, or else you can calculate the required value based on the caps value + amp impedance.
Impedance (R) in this case should be 1/R = 1/amp impedance + 1/bypass resistor
Than the corner freq. is f = 1/(2*pi*C*R), where C is capacitance, and R is the input impedance of the amplifier (which is the combined impedance from above).
The goal is to keep f as small as possible, hopefully 10x smaller than the minimum freq. (which is 20Hz, as our hearing limit dictated) in order to minimize distortion. The point is, you want to adjust C and R to make sure f will be 2Hz or less, the lower the better. You also want to take into the account of the fact that amp impedance changes with amp volume, so you want to use the minimum input impedance of the amp to do the calculation.
I have tried Nichicon VP series with very good result, though it is not made fro audio purpose. Nichicon ES series will be my choice since it is very transparent and still in production. Blackgate is probably very overkill since one of them can cost almost 2X more than the connector. If you don't mind the shape, you can try film caps like Wima with smaller capacitance but you must bypass it with a very high value resistor (like 100K or more). You can read this thread about where to find good caps.
The part number fro Ridax connector is SD_B. Sandisk/Creative dock connector plug ultra thin/black snap or SD_W. Sandisk/Creative dock connector plug ultra thin/white snap. The SD_U series is only good for v1 (capless). I have link on the first post.
Impedance (R) in this case should be 1/R = 1/amp impedance + 1/bypass resistor
Than the corner freq. is f = 1/(2*pi*C*R), where C is capacitance, and R is the input impedance of the amplifier (which is the combined impedance from above).
The goal is to keep f as small as possible, hopefully 10x smaller than the minimum freq. (which is 20Hz, as our hearing limit dictated) in order to minimize distortion. The point is, you want to adjust C and R to make sure f will be 2Hz or less, the lower the better. You also want to take into the account of the fact that amp impedance changes with amp volume, so you want to use the minimum input impedance of the amp to do the calculation.
I have tried Nichicon VP series with very good result, though it is not made fro audio purpose. Nichicon ES series will be my choice since it is very transparent and still in production. Blackgate is probably very overkill since one of them can cost almost 2X more than the connector. If you don't mind the shape, you can try film caps like Wima with smaller capacitance but you must bypass it with a very high value resistor (like 100K or more). You can read this thread about where to find good caps.
The part number fro Ridax connector is SD_B. Sandisk/Creative dock connector plug ultra thin/black snap or SD_W. Sandisk/Creative dock connector plug ultra thin/white snap. The SD_U series is only good for v1 (capless). I have link on the first post.
