The "Wire we Here?" Blog and Forum
A place for speaker cable discussions.
I've had questions on the dual bi-wire system as far as "economy". What we can suggest based on the actual measurements, is that you really need the parallel cable in the LOW-END to drop the cable impedance closer to the load. See the bi-wire paper graphs that illustrate this. Lower frequency impedance RISES much faster as the cable reactance (phase shift increases) goes UP. The UPPER FREQUENCY are already much lower in impedance where the PHASE stays much lower, and use the more expensive sereis II cable to further mitigate the Vp non linearity in cable in the higher frequency where it is the opposite, worse in the treble than the bass. Stuff in audio cables always seems to be pushing one problem and pulling the other.
We can save costs by using the series I in parallel for the bass that offers the bigger improvement. The upper frequency series II in parallel can be managed with a SINGLE series II cable with far less impact on the improvement because the impedance is flatter. Yes, it is even flatter with the parallel series II but to save costs, do the parallel series I to the bass first for sure. The upper frequency series II parallel can be added later. The bi-wire paper explains all this in gory detail with true measurements across several cable types. Nothing escapes the physics.
Best,
Galen