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12V-24V TPA3116D2 Amplifier Supports 100 W subwoofer + 50 W right channel + 50 W left channel Input with Bluetooth 4.2 or AUX Billing and support guaranteed - 10 years of Italian experience from Digitalkey.it; Product description Instructions for use: 1- Connect the amplifier that turns on in Bluetooth mode. If necessary, change the mode from BT to AUX by holding down the volume potentiometer. 3- Connect the speakers according to the picture. Technical data: Dimensions (L x W x H): 101 x 100 x 25 mm without potentiometer. Operating voltage range: DC 11-25V / 3-4A, 19-24V / 4-5A, 20-24V / 8-9A. Audio sensitivity from input II: 600-800mV Frequency range: 20 Hz - 20 kHz. L-R channel impedance: 4-8 ohms. Sub-channel impedance: 2-8 ohms.; Product description Instructions for use: 1- Connect the amplifier that turns on in Bluetooth mode. If necessary, change the mode from BT to AUX by holding down the volume potentiometer. 3- Connect the speakers according to the picture. Technical data: Dimensions (L x W x H): 101 x 100 x 25 mm without potentiometer. Operating voltage range: DC 11-25V / 3-4A, 19-24V / 4-5A, 20-24V / 8-9A. Audio sensitivity from input II: 600-800mV Frequency range: 20 Hz - 20 kHz. L-R channel impedance: 4-8 ohms. Sub-channel impedance: 2-8 ohms.; Instructions for use: 1- Connect the amplifier that turns on in Bluetooth mode. If necessary, change the mode from BT to AUX by holding down the volume potentiometer. 3- Connect the speakers according to the picture. Technical data: Dimensions (L x W x H): 101 x 100 x 25 mm without potentiometer. Operating voltage range: DC 11-25V / 3-4A, 19-24V / 4-5A, 20-24V / 8-9A. Audio sensitivity from input II: 600-800mV Frequency range: 20 Hz - 20 kHz. L-R channel impedance: 4-8 ohms. Sub-channel impedance: 2-8 ohms.