A4Toverview The A4t is the top of the food chain of the A-Series. The addition of the third woofer spreads the load for demanding bass and is ideal for larger rooms or those who want the best the A-Series has to offer. The A4t offers the lowest best-in-class distortion and is a contender for any audiophile application. The A4t is also equally at home in an immersive audio or cinema setting and pairs perfectly with the other A-Series SKUs. It's all inthe details The A4t is a floor-standing speaker that features a bespoke 35mm composite Teteron dome tweeter mounted in a unique waveguide, along with three bespoke 215mm carbon fiber woofers in a bass reflex enclosure. The A4t also has a custom-engineered crossover and cabinet. This is Perlisten through and through. Enclosure Alignment 2-1/2 way Bass Reflex Driver compliment Tweeter:35mm, composite Teteron domeWoofers:(3) 215mm, carbon fiber diaphragm Sensitivity 88.6dB / 2.83v / 1.0m Impedance 4Ω nominal / 3.1Ω min Response Linearity 100 - 10kHz +/-2.0dB window Frequency Response 35 - 27kHz (-6dB)28 - 27kHz (-10dB) Typical In Room bass extension 28 Hz (-6dB)19 Hz (-10dB) Overall Dimensions 1285H x 280W x 450D mm50.6H x 11.0W x 17.7D inches Recommended Amplifier Power 50 - 350W SPL capability @1m (100-20kHz) 114.0dB peak111.0dB peak