ACE IX400. Audio output channels: 2.1, RMS rated power: 28 W, Recommended usage: PC. Amplification device type: amplifier, Amplification device form factor: built-in, Amplifier output power: 21 W. Satellite speaker type: 1-way, Satellite speakers RMS power: 10 W, Satellite speaker frequency range: 120 - 20000 Hz. Subwoofer type: Active, Subwoofer RMS power: 8 W, Subwoofer driver size: 203.2 mm (8 "). Power source: AC