jbl 4309JBL 4309 A musical speaker with magnificent sound When it comes to JBL's 4309, there is a lot to be excited about. It plays with an energy, dynamics, and clarity that competitors find hard to match, and it does so at a price that makes it accessible to many. So if you like speakers that are entertaining and musical, the JBL 4309 could very well be the perfect match for you. JBL designed and engineered the 4309 at its world famous acoustic engineering