< p> The brand-new HYDROGEN series GZHW 8SPL-D2 FLAT subwoofer solves the problem of cramped installation space requiring a shallow enclosure for the< br> subwoofer.< br> < br> Equipped with a powerful motor and a huge voice coil known from the existing subwoofers of the Hydrogen SPL series, this moden handles power input of up to 800 Watts SPL< br> < br> < br> 8″ high quality flat SPL subwoofer< br> Klippel® optimized< br> Sandwich paper cone< br> Durable U-shape rubber surround< br> Solid aluminum cast basket< br> 50 mm / 2″ copper voice coil< br> 4-layer copper voice coil< br> Push terminal< br> < br> Enclosure recommendation:< br> < br> Vented: 16 Liter netto< br> Port 1 x 70 mm / 1 x 2.76”< br> port length* 300 mm / 11.81”< br> frequency 37 Hz< br> < br> < br> Vented (small enclosure)< br> 12 Liter netto / 0.424 cu.ft. net< br> Port 1 x 70 mm / 1 x 2.76” 300 mm / 11.81”< br> frequency 42 Hz< /p>