RetroSound R-57N Single 5"x7" 2-way car speaker with dual voice coils at Crutchfield
iLive Dual Desktop Bluetooth Speakers (ISB1400B)
Dual Electronics LU43PB 3-Way High Performance Outdoor Indoor Speakers with Powerful Bass | Effortless Mounting
JBL PRX825W Dual 15" Two-Way 1500W Powered PA Speaker PRX825W
Amazon.com: Bluetooth Speaker Set: Wireless Stereo Dual Pairing Portable Twin TWS System With Big Strong Rich Bass Hi-Fi Multi-Room Indoor Outdoor Use For Home Deck Pool Work Travel Party Camping Gift Decor
Dual Electronics 3-Way Indoor And Outdoor Speakers, 1-Pair