< p> A design combining superior operability and beauty. And introducing a new technology, Twisted Flare Port, for clear and tight bass. A subwoofer that will match a wide range of speakers and interiors.< br> < br> PWM digital drive high efficiency amplifier and dual feedback circuit< br> New Twisted Flare Port contributes to clear and tight bass< br> Advanced YST II (Yamaha Active Servo Technology II)< br> 20 cm (8”) cone woofer< br> Beautiful design will match a wide range of speakers and interiors< br> Front control panel for easy control< br> System control and Auto standby< /p>