Car Subwoofer - DD REDLINE 112d

 The 100 Series woofers are optimized for high efficiency output in
smaller sized enclosures being driven with today′s multichannel
amplifiers. High efficiency begins with our EROM surround, giving the
most useable cone area, lightest surround mass and highest excursion.
A powerful double magnet motor system with triple venting powers,
these drivers for the highest levels of deep bass output.