Hardware Pros heeft de PowerCobe ADA 305 speakers et van Altec Lansing gereviewed. Dit is één van die nieuwe speakers met USB aansluiting:
The most interesting feature is what Altec Lansing calls True Digital Audio. When you use the provided USB connection, the speakers will be completely controlled by the USB bus and Windows 9X. The funny thing is, you don't even need a sound card to use these speakers. That is why its called true digital audio. When digital audio is passed to a sound card, it is always converted to an analog signal using a DAC. This is done so that the card can process the sound, add effects, adjust amplification, etc. The signal is then sent to your speakers and because its in an analog form, it can pick up electronic interference on the way which translates into hissing and static which we've all heard before. With the USB connection, the digital audio signal bypasses the sound card and is sent straight to the speakers, thereby eliminating all noise that can enter the signal.