Philips HTL2183B/93, 3.1 channels, 150 W, Dolby Digital, Dolby Pro Logic II, 96 W, 4 Ω, Passive subwoofer Philips HTL2183B/93. Audio output channels: 3.1 channels, RMS rated power: 150 W, Built-in audio decoders: Dolby Digital, Dolby Pro Logic II. Soundbar speaker RMS power: 96 W, Impedance: 4 Ω. Subwoofer type: Passive subwoofer, Subwoofer RMS power: 55 W, Subwoofer frequency range: 45 - 200 Hz. Product colour: Black, Recommended usage: Universal, Audio formats supported: MP3. Connectivity technology: Wired & Wireless