Sennheiser has introduced two new Bluetooth stereo headphones and a new Bluetooth dongle for iPod and iPhone, all featuring the apt-X audio codec. Apt-X was designed to work within the Bluetooth A2DP profile to enhance sound quality; the developer claims it delivers CD-quality sound and a high degree of error resilience despite the inherent bandwidth restrictions. The PXC 310 BT is Sennheiser’s new flagship Bluetooth headphone, offering NoiseGuard…
