Philips SBA1503/37, 2.0 channels, Wired, 2 W, 100 - 18000 Hz, 4 Ω, Black, Silver Philips SBA1503/37. Recommended usage: Universal. Audio output channels: 2.0 channels, Number of drivers: 2. Connectivity technology: Wired. RMS rated power: 2 W, Frequency range: 100 - 18000 Hz, Impedance: 4 Ω. Product color: Black, Silver