Amazon.com: Rockville PBG18 18" Passive 2000 Watt 8 Ohm Pro Audio Subwoofer Sub/MDF Cabinet, Black : Musical Instruments
OMNITRONIC MAXX-1810DSP 2.1 Active System, Powerful Active PA System with DSP, Bluetooth, 800 Watts (18 Inch Sub, 10 Inch Tops) : Amazon.de: Musical Instruments & DJ