Polk Audio DB522 DB+ Series 5.25 Coaxial Speakers with Marine Certification JBLQUANTUMTWS Drivers developped and manufactured by

Drivers developped and manufactured by Focal in France

Power Up with the Built-In Powerbank

"Smart Ambient" mode lets you hear external sounds without removing headphones

the Polk Audio Vanishing Series in-wall center-channel loudspeaker offers a one-cut

JVC Streaming DJ lets you pair up to 5 smartphones via Bluetooth - Does not play CDs

Polk Audio DB522 DB+ Series 5.25 Coaxial Speakers with Marine Certification JBLQUANTUMTWS Drivers developped and manufactured byDynamic Balance: Dynamic Balance is a proprietary Polk Audio technology using laser imaging to determine what combination of speaker materials create the least amount of resonance. Eliminating resonance in speakers results in a wide, smooth response and low distortion. Marine Certification: Polk speakers are marine certified, making them a good choice for boats in fresh water, convertibles, motorcycles, ATVs, and other applications where the speaker