Providing a first-class multimedia experience whether at home, in a dorm room, or on the go, the Toshiba Qosmio F45-AV413 Refurbished Notebook PC packs two Harman Kardon Bass Reflex stereo speakers, a built-in subwoofer and Dolby Home Theater technology into a compact notebook frame. This high-end speaker configuration dramatically compliments the visual experience by delivering a sophisticated suite of audio technologies, such as Dolby Digital, Dolby Digital Live, Dolby Pro Logic II, Dolby Headphone and Dolby Virtual Speaker.