Words, grammatical forms and meanings linked to the ontology.
5.1 en · NOUN
Meanings
(attributive, uncountable) A six-channel surround sound audio system, having five full-bandwidth channels and one low-frequency effects channel.
Unless you have the space to set up a mini IMAX in your living room, your best bet is to get a decent 2.1 or 5.1 speaker set. 2006, Ben Hardwidge, Building Extreme PCs: The Complete Guide to Computer Modding: