Part number:1 Precations:1>.Power amplifier board, then the horn between the two pads DC voltage 0V, between the speaker pad and GND DC voltage is half of the power supply voltage.2>.Use 4 ohm speakers, the maximum power supply voltage can not exceed 16V, otherwise the chip is too high heat damage to the amplifier. Use 8 ohm speakers, the maximum power supply voltage can not exceed 24V, otherwise the voltage is too high breakdown power amplifier chip.3>.Power amplifier board power, the hand can not touch the board components on the chip. As well as the body with static power in the case of direct breakdown of components.Specifications:Model: OEP30W amplifier moduleWorking style: Class D(PWM modulation)Chip election: OEP30W*2Channel number: Mono channelPower supply range: DC 7.5V-24VAmplifier gain: 36dB(Can be set 26dB)Input impedance: 1K ohmOutput impedacce: 8-3.2ohmOuptut power:1>.30W (4ohm, 16V)2>.17W (4ohm, 12V)3>.15W (8ohm, 16V)4>.9W (8ohm, 12V)5>.25W (4ohm, 16V)6>.12W (8ohm, 16V)Quiescent current: 11mA(12V power supply)Resting current: Recommended speaker: 30-100WSignal to noise ratio: 102dBHarmonic distortion: Frequency range: 20Hz-20kHzWorking temperature: -40~85Cooling volume: Without coolingSize: 18*18*2.2mmPackage List:1 X DC 7.5-24V Mono Digital Power Amplifier Board 30W Class D Audio Play Module It is a DC 7.5-24V Mono Digital Power Amplifier Board 30W Class D Audio Play Module. Mini small size, easy to install. Output short circuit protection. The CS control shutdown current is only 0.3MA. 11MA of quiescent start-up current; High gain amplifier (36 dB). Ideal for amplification of weak signals, saving the need to add preamplifiers and reducing costs. Computer audio input changes the power amplifier gain to 26db for use; Products are fully pin and size compatible. Convenient product replacement, OEP3W, OEP20W OEP3OW, OEP60W. SHOP WITH CONFIDENCE: To provide you with the highest quality service, If you have any question, please feel free to contact us.We will provide after-sales service until you are satisfied. It is a DC 7.5-24V Mono Digital Power Amplifier Board 30W Class D Audio Play Module. Mini small size, easy to install. Output short circuit protection. The CS control shutdown current is only 0.3MA. 11MA of quiescent start-up current; High gain amplifier (36 dB). Ideal for amplification of weak signals, saving the need to add preamplifiers and reducing costs. Computer audio input changes the power amplifier gain to 26db for use; Products are fully pin and size compatible. Convenient product replacement, OEP3W, OEP20W OEP3OW, OEP60W. SHOP WITH CONFIDENCE: To provide you with the highest quality service, If you have any question, please feel free to contact us.We will provide after-sales service until you are satisfied.