Monacor SPM-116/8 4 inch 11.5 cm Subwoofer 40 W 8 Ω | Conrad.com
Monacor SPH-5M 5.5 inch 15 cm Subwoofer 40 W 8 Ω | Conrad.com
Klipsch BAR 40 Sound Bar & Wireless Subwoofer Dimensions & Drawings | Dimensions.com
Stoneway Bluetooth Speakers, 40cm Long Portable Wireless bluetooth Boombox HIFI Stereo Super Bass Subwoofer Built-in Mic Support AUX USB FM TF with Phone Holder - RGB Colorful Lights - Walmart.com
Sonos Sub Wireless Subwoofer Dimensions & Drawings | Dimensions.com
Kicker 40cm Subwoofer Speaker 1 Shot + Wooden BOX | Sub Woofer with BOX | Croooober