The Sony/Philips Digital Interface is the ?red book? standard for digital audio signal transfer. SPDIF coaxial cables can carry linear PCM or multi-channel Dolby AC-3/DTS digital content. SonicWave(?) Digital Audio Interconnects by Impact Acoustics feature proper characteristic impedance, fast frequency-independent signal propagation and effective shielding against RFI and EMI. Impact Acoustics SonicWave SPDIF interconnects use smooth, flawless, large cross-section silver-plated OFC as the signal conductor. A nitrogen-foamed PE insulation exhibits extremely low dielectric constant. Cu Shielding Technology(?) provides three layers of shielding: two 80%+ OFC copper braids and one 100% overlapped Mylar(R) foil. Precision design and manufacturing ensures the characteristic impedance of the cable assembly remains 75 ohms, +/- 5 ohms. This high performance SPDIF digital cable is also ideal as a world-class composite video cable for especially demanding video applications!