What is 9.3 surround sound?

Answer 1

The use of numbers to describe the configuration has become commonplace. 5.1 surround sound is the most common configuration, indicating that there are five full range speakers and one bass driver. The five full range speakers are positioned as left, center, right, rear left and rear right. This is a basic configuration to provide surround sound although 7.1 is becoming more common. 3.1 indicates a configuration of left, center, right and a single bass driver and therefore cannot be called surround sound as no sound is delivered from the rear. It may also refer to a left, right, rear and bass configuration, which will produce a sound from the rear. The general opinion is that a single rear speaker is not as effective as two and in order to benefit from rear speakers, the center speaker is also an important element. The manufacturer will specify which configuration is offered in a 3.1 system so it is important to check the manuals and product literature to establish exactly what the system offers.

Answer 2

9.3 surround sound refers to an audio processing system that has 9 separate audio channels, and 3 separate subwoofer channels hence the ".3"