Products Description AT-322Maximum Output Power: 380W (4Ω Load)Total Harmonic Distortion:<0.5%Frequency Response: 35Hz-18kHzDriver Configuration:2×12" Woofer: 140mm Magnet, 50mm Voice CoilTweeter: 120mm Magnet, 44mm Voice Coil DriverPower Supply: AC 220V/60HzBuilt-in Battery: 12V/20Ah ×1Wireless Receiver Module: UHF BandOptional Wireless Microphones: 2 units (handheld/lavalier/headworn)AT-325Maximum Output Power: 430W (4Ω Load)Total Harmonic Distortion:<0.5%Frequency Response: 35Hz-18kHzDriver Configuration:2×15" Woofer: 156mm Magnet, 50mm Voice CoilTweeter: 120mm Magnet, 44mm Voice Coil DriverPower Supply: AC 220V/60HzBuilt-in Battery: 12V/20Ah ×1Wireless Receiver Module: UHF BandOptional Wireless Microphones: 2 units (handheld/lavalier/headworn)