The main technical parameters:
Operating voltage range:
DC 5-24V (current 3A above, such as to power some advice 19-24V / 4A above, best for 24V)
Audio Type: Class D
Output channel: 2
Frequency response range: 20Hz-20KHz
Dual channel speaker: 4-8 Euro
Maximum output power:
50W (left channel) + 50W (right channel) two channels
Dual-channel output power:
12V / 10 + 10W(8 Euro) / 15 + 15W (4 ohms),
15V / 13 + 13W(8 Euro) / 25 + 25W (4 ohms),
19V / 22 + 22W(8 Euro) /> 39 + 39W(4 ohms),
22-24V /> + 32W(8 Euro) /> 50 + 50W(4 ohms).
The output power and supply voltage, the speaker impedance audio input size.
Generally higher supply voltage, the output power can be supported will be the bigger.
Different impedance speaker can support output power is different, usually smaller horns European
Power is also easy to do bigger.
About Arduio Input Terminal:
Please try to use a Shielded type of cable to reduce noise and current sound input connector incurred.
The connecting cable is available between the lines open or shorted, will lead to noise or current sound, no sound track, etc.