Warm Audio Prem-TRS-20 Premier Series TRS Cable (20′)

A traditional balanced cable uses three cores of wire to carry audio signals—one shielded core for the positive leg, one shielded core for the negative leg, and a plain outer wrap that functions as the ground. The idea is this: a fully balanced system flips the phase of the signal, merges the positive and negative signals together, and effectively cancels out interference encountered along the cable’s length by throwing it out-of-phase with the audio.

Star-quad construction takes that concept even further, by using five cores instead of three. Two cores are provided each for the positive and negative legs, as well as a single ground. This helps to further shield the audio from RFI (radio frequency interference), ensuring an even better performance.

Most cable construction techniques use an outer wrap of wire to act as the ground. Some manufacturers braid this wire, while others simply wrap the wires in a highly uniform way to shield the interior wires from electromagnetic interference.

Double-Ruessen shielding goes further than more traditional techniques in two ways: First, the cable is wrapped with two separate shields. Secondly, the outer shield is wrapped in a contrary direction to the inner shield, creating a stronger and more complete barrier from EMI for the internal cores.