SPECO ASPC-20 Amplified Mobile PA Horn 6IN 20W 3-16OHM 12V-DC: Amazon.com: Industrial & Scientific
Amazon.com: Home Audio Power Amplifier System 2X40W Mini Dual Channel Sound Stereo Receiver Box w/ LED For Amplified Speakers, CD Player, Theater via 3.5mm RCA for Studio, Home Use Pyle PCA2 Black :