Thanks to Stfoth for providing the data on the SoundPath RCAs. Their price is indicated at the SVS website as $89.98 for a stereo pair of 8 meter cables, and those are the only interconnects listed, so I assume those are what RV was provided with.
RV, given the lengths that are involved (even if you were to change to 16 feet), and given the somewhat highish output impedance of your preamp, and the unknown but very possibly highish output impedance of the sub’s high passed line-level outputs, it is particularly important for the cable to have low capacitance per unit length. The SoundPaths provide that, at 39 pf/meter. But of course a shorter length, such as 16 feet, would reduce the total capacitance correspondingly, and very possibly be beneficial in other ways.
I could probably get away with 15’ cables. I understand from SVS that’s the next size down, but I’d feel comfortable with a foot or more longer than 15.
The SVS website lists the SoundPath offerings only in metric lengths, including 5 meters, which is 16.4 feet.
Another possibility for a modestly price cable having very low capacitance (12.2 pf/foot), which can be ordered in any desired length, would be
Blue Jeans LC-1.
Cable differences are generally system dependent and hard to predict, of course, but I wouldn’t be surprised if changing to a 5 meter length of the SoundPath cable, or a 16 foot length of the Blue Jeans cable, would provide a worthwhile benefit.
Best regards,
-- Al