Edifier R1000T4 Ultra-Stylish Active Bookself Speaker - Uncompromising Sound Quality for Home Entertainment Theatre - 4inch Bass Driver Speakers BLACK Active bookshelf speaker system with 16W total power output 4 inch bass driver and 3/4 inch silk diaphram tweeter driver Dual stereo LINE-IN ports, Treble upgrade on port ÔÇ£A\' Housed in 100% medium-density fibreboard (MDF), this bookshelf speaker is built to resist resonance. While the wood accent complements any surrounding, whether you use it at home or the office. Featuring 4\' bass drivers and ?¥\' silk-diaphragm tweeter drivers, R1000T4 bookshelf speaker is engineered to deliver commanding sound with emotions and details. And the pair of golden bass drivers add a splash of colour to your everyday sound. For a personalised listening experience, youÔÇÖll find the bass and volume adjustment dials at the back of this bookshelf speaker. R1000T4 also features dual stereo line-in ports, with dynamic treble enhancement on port A. TOTAL POWER OUTPUT: RMS 12W ?ù 2 (DRC ON) SNR: ÔëÑ85dBA INPUT SENSITIVITY (PC): 700mV ?? 50mV INPUT SENSITIVITY (AUX): 550mV ?? 50mV FREQUENCY RESPONSE: 75Hz - 18kHz BASS UNIT: 4ÔÇ? (116mm) TREBLE UNIT: 1.5\' (13mm)