From wikipedia-
"The disadvantage is that star quad, in combining two conductors, typically has more capacitance than similar two-conductor twisted and shielded audio cable. High capacitance causes an increasing loss of high frequencies as distance increases.
[7][8] The high-frequency loss is due to the
RC filter formed by the output impedance of the cable driver and the capacitance of the cable. In some cases an increase in distortion can occur in the cable driver if it has difficulty driving the higher cable capacitance.
The capacitance of a 4 conductor quad-star cable is roughly equal to the capacitance of a standard 2 conductor cable about 1.5 times as long. The increased capacitance of the star quad cable is not usually a problem with short cable runs, but it can be an issue for long cable runs. For example, an 8 m (25 ft) star-quad cable has a capacitance of 150 pF/m
[9] for a total capacitance of 1200 pF for the entire length of cable. With a 150 Ohm source impedance and 1200 pF load capacitance, the frequency response of this
RC circuit is -0.02 dB at 20 kHz. If the cable were 80 m instead of 8 m, then the frequency response would be -0.2 dB at 20 kHz, and -3 dB at 88 kHz"
This could be a real issue at 500m