Different types of cable for bi-wire


Any issue with doing high gauge silver cable for the the high frequencies (24 or 26 AWG), while using a low gauge copper cable for the lower frequencies (like a 10 AWG)? I am thinking if they are the same length there might not be an issue here, but wanted to confirm. Was wondering if there could be any sort of timing issue or other issue with the different conduit. Thanks
bstatmeister

Showing 1 response by almarg

There might be an issue, depending on the impedance characteristics of your speakers and on the length of the cable.

For example, the combined resistance of the two conductors of a 10 foot 26 gauge silver cable is around 3/4 of an ohm. That is about the same as the impedance of many electrostatic speakers in the upper treble region. While some dynamic speakers have impedances in the area of 3 or 4 ohms throughout most of the mid-range and treble regions.

In either of those cases the 3/4 ohm resistance is a significant fraction of the impedance of the speaker at numerous frequencies, and hence it would attenuate those frequencies significantly relative to the frequencies that are handled by the heavy gauge cable.

What matters in all of this is not the fact that less current and power is usually required at high frequencies compared to low frequencies. Rather, what matters is mainly the relation between cable resistance and speaker impedance, throughout the range of frequencies that would be conducted by the particular cable.

Regards,
-- Al