The GS is available with either a 12-speaker Lexus GS Premium SoundSystem that represents the next generation of clarity in Lexus sound, or anoptional 17-speaker Mark Levinson Premium Surround Sound System.Delivering 7.1-channel digital surround sound, this peerless top-of-the-rangesystem provides a true live concert experience for enjoying music andwatching DVDs. The careful positioning of the five main speakers givesbeautifully consistent sound for both front and rear seat occupants, resultingin a superb level of definition, atmosphere and quality. The Mark Levinsonamplifier generates a total of 835 watts, while consuming very little power.