JBL Studio 6 Theater Home Theater In-Wall Speaker with Quad 5.25" Woofers - Each | World Wide Stereo
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Quad - S-2 Bookshelf Speakers (Pair) - Music Direct
Quad ESL loudspeaker | Stereophile.com
Amazon.com: Pyle 2-Way Dual Waterproof Off-Road Speakers - 4 Inch 900W Marine Grade Wakeboard Tower Speakers System, Full Range Outdoor Audio Stereo Speaker for ATV, UTV, Quad, Jeep, Boat PLUTV40BK (Black) :