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Parameters: the operating voltage of the car stereo amplifier board is DC9-15V, recommended DC 12V, the maximum output power is 2x35W stereo (14.4V 4Ohm), can connect 4~8 ohm speakers. Class AB: The Class AB amplifier is a design compatible with the advantages of Class A and Class B amplifiers with good sound quality. Class AB amplifier is also the most widely used car audio design. Button Control The dual channel gain module is equipped with a volume control, which is very convenient for volume control. ARTIFICIAL MATERIAL This newly designed audio amplifier is composed of a noble black immersion gold board and a large capacity filter capacitor for channels. Safe Protection The amplifier board is equipped with input reverse polarity protection, short circuit protection, over-current protection and overheating protection.; Product description Parameters: Voltage: DC 9-15V, recommended 12V. Output power: max. 2 x 35 W stereo (14.4 V 4 Ohm), can connect 4 ~ 8 Ohm speakers Input methods: 3.5mm audio input Protection functions: input reverse protection, short circuit protection, overcurrent protection and overheating protection. Potentiometer twist handle opening: 7 mm PCB size: ?e: 55.12 x 45.21 mm Overall dimensions (including refrigerator): 55.12 x 59.09 x 50 mm Package includes: 1 x car stereo amplifier board; Product description Parameters: Voltage: DC 9-15V, recommended 12V. Output power: max. 2 x 35 W stereo (14.4 V 4 Ohm), can connect 4 ~ 8 Ohm speakers Input methods: 3.5mm audio input Protection functions: input reverse protection, short circuit protection, overcurrent protection and overheating protection. Potentiometer twist handle opening: 7 mm PCB size: ?e: 55.12 x 45.21 mm Overall dimensions (including refrigerator): 55.12 x 59.09 x 50 mm Package includes: 1 x car stereo amplifier board; Parameters: Voltage: DC 9-15V, recommended 12V. Output power: max. 2 x 35 W stereo (14.4 V 4 Ohm), can connect 4 ~ 8 Ohm speakers Input methods: 3.5mm audio input Protection functions: input reverse protection, short circuit protection, overcurrent protection and overheating protection. Potentiometer twist handle opening: 7 mm PCB size: ?e: 55.12 x 45.21 mm Overall dimensions (including refrigerator): 55.12 x 59.09 x 50 mm Package includes: 1 x car stereo amplifier board