The black 40W Amplifier and Surface Mounted Speaker Combination from OWI Inc. includes a 40W single source amplifier (AMP1SGB), a 12V UL Listed power supply, and 2 black 5.0" (12.7 cm), 2-way, ported speakers (P5278) with a maximum power of 40W RMS.
The single input / single source wall amplifier and the P-series surface mount speaker comes placed in a UL Rated double gang-box. It can drive up to a maximum of 4 speakers (sold separately). 12VAC power supply is included. It also features a volume control on the front metal faceplate.