JBL Professional на Твитеру: "Check out the 2216Nd Differential Drive Woofer, providing rich low frequency performance for the M2! http://t.co/cTBoALwFNu" / Твитер
Harman Pro India on Twitter: "The 2216Nd Differential Drive Woofer in the @TheJBLpro M2 is no "off-the-shelf" woofer. Employing nothing less than 5 patented technologies, it allows bass extension to the limits