What is the audio signal voltage output and what is the advantage of high voltage output?
A. High voltage audio output has become a great marketing point. However, one needs to look further than numbers to understand what the advantage and application is. With most common audio setups, the headunit supplies audio signal to the external amplifiers over RCA wires that may run over a long distance parallel to other wiring. The further wires have to run, the more signal degradation, as well as noise accumulation, will occur. One of the ways to decrease this effect is to increase the audio signal voltage output. In other words, the noise still stays; its just not as noticeable as it is not amplified as much. A big advantage of using an external audio adapter, such as Sound Blaster Audigy 2 NX is that its audio wiring doesnt have to run through the whole vehicle. The adapter itself gets all of sound data digitally and only then converts it into analog signal. Since it can be installed right next to the amplifier unit, analog audio noise will be extremely low due to short audio ca
