MADE IN USA. TITANIUM TWEETERS.12inch ,Deep base. The JBL S312 is a robust 3-way floorstanding loudspeaker from JBL's Studio Series. It features a massive 12-inch woofer designed to deliver deep bass, making it a highly regarded choice for both home theater setups and large listening spaces. [1, 2, 3, 4, 5] Here are the key specifications for the JBL S312: Design: 3-Way Floorstanding Loudspeaker Low-Frequency Transducer: 12" PolyPlas™ (polymer-coated cellulose fiber) cone woofer Midrange Transducer: 4" PolyPlas™ cone midrange High-Frequency Transducer: 1" Pure-titanium dome tweeter with an EOS (Elliptical Oblate Spheroidal) waveguide Maximum Recommended Amplifier Power: 250 Watts Frequency Response: 35Hz – 20kHz (±3dB) Sensitivity: 92dB (2.83V/1m) Nominal Impedance: 8 Ohms Crossover Frequencies: 750Hz and 3000Hz Dimensions: 41.1/8" H ...