ST-838 2.1 Channel HiFi Stereo Subwoofer Amplifier, RMS 20Wx2+40W Mini Digital Audio Power Amplifier for Home Speakers, 80W Subwoofer Amplifier Audio Stereo Bass Amp with Power Supply - Black

Mini Size but Powerful-- Don't be fooled by its size, itll give your entertainment system a serious boost. With 2.1 channel output RMS 20W×2(L/R)+40W (subwoofer), which can drive most home/car/marine/outdoor passive speakers and subwoofers, and with excellent sound. Low distortion, acoustically accurate reproduction of music, which sounds smooth and full.; Bass & Treble & Sub Vol Control-- Designed with main volume, treble and bass control knobs, Which for more delicate adjustment of the sound, much fun and high playability. Besides main volume, treble and bass control, sub volume control is specially designed.

They allow you to control the volume of passive Subwoofer and two passive speakers separately as you wish.; RCA & AUX Inputs-- With standard stereo RCA and 3.5 mm AUX inputs, can be compatible with various devices, such as mobile phone, MP3, MP4, CD player, TV, computer etc. Just enjoy your music the way you want to. Besides, there's a little blue woofer alert that turns on when the woofer is beating.;
Portable & Convenient-- Mini Size: 5.9 x 3.6 x 1.4" / 15x 9.1 x 3.7 cm, amplifier
weight: 0.66 pounds/ 0.3 kg. Compact design with exquisite appearance, matt black case looks fashionable and durable, unique structure design easy to be installed in car, marine, RV, golf cart or home, which save space and convenient to operate.