Description:_x000D_ This is a mini 2 channel HiFi stereo audio power amplifier for home / car audio, motorcycles, boats, MP3, and so on. 20W + 20W output, 12V amplifier with bass, treble & volume control in small size is easy to install and use. Order it and enjoy music._x000D_ _x000D_ Features:_x000D_ _x000D_ All aluminium alloy shell, to eliminate all kinds of electromagnetic interference. _x000D_ Using high-power audio amplifier chip, the output power is 20W +20 W. _x000D_ Suitable for no more than 6 inches & impedance of 4-8 20W speakers. _x000D_ Two pairs of speaker output clips, easy to wire. _x000D_ Support high & low frequency adjustment._x000D_ _x000D_ _x000D_ Specifications:_x000D_ Output power: 20W + 20W_x000D_ Input Power: 12V DC_x000D_ Input Sensitivity: 200mv_x000D_ Input Impedance: 47Kohm_x000D_ Speaker Impedance: 4 - 8 ohms_x000D_ Frequency Response: 20Hz to 20KHz_x000D_ Min. THD: 70dB_x000D_ Color: Red_x000D_ Size: Approx.125 x 70 x 40mm / 4.9 x 2.8 x 1.6inch_x000D_ Material: aluminium alloy_x000D_ Package weight: 228g_x000D_ _x000D_ Package List:_x000D_ 1 x Power Amplifier_x000D_ 1 x User Manual_x000D_ _x000D_ _x000D_ Note:_x000D_ 1. The product is constant impedance matching, and does not support constant voltage matching (for example: The general constant voltage speaker (power supply AC70-120V) outer package is equipped with a transformer or a transformer on the speaker)._x000D_ 2. Products with power amplifier are not supported, that is, those with built-in power amplifier function (the power amplifier effect is not good); please confirm whether your equipment complies with it before ordering.1All aluminium alloy shell, to eliminate all kinds of electromagnetic interference. 2Using high-power audio amplifier chip, the output power is 20W +20 W. 3Suitable for no more than 6 inches & impedance of 4-8 20W speakers. 4Two pairs of speaker output clips, easy to wire. 5Support high & low frequency adjustment.