![JBL 2216ND 15" LF Differential Drive Woofer for M2 Master Refernce S4700 Speaker for sale online | eBay JBL 2216ND 15" LF Differential Drive Woofer for M2 Master Refernce S4700 Speaker for sale online | eBay](https://i.ebayimg.com/images/g/6O0AAOSwMY5k6OAV/s-l225.jpg)
JBL 2216ND 15" LF Differential Drive Woofer for M2 Master Refernce S4700 Speaker for sale online | eBay
JBL Professional - What's inside the JBL Professional M2 Master Reference Monitor? The annular design of the D2 diaphragms reduces distortion along with the 2216Nd Differential Drive Woofer, not your "off-the-shelf" woofer,
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