Frequency Response / Acoustic Data: Rated bandwidth: 45 Hz-32 kHz (+/-3 dB). Nominal impedance: 8 ohms. Sensitivity: 87 dB (2.83V @ 1 meter full-space, 300-3kHz) Recommended amplifier power: 20-150 watts. Speaker Specs: Bookshelf Loudspeaker Real black oak veneer and piano gloss black finish options Dual gold-plated 5-way binding posts 1.7” wide-flared rear-firing port Cloth grille with pin/cup retention system Elastomer stick-on bumper feet (adds 3mm to height) Cabinet Dimensions: 15” (H) x 8.5” (W) x 10.6” (D) (without grille) Overall Dimensions: 15” (H) x 8.5” W x 10.9” (D) (with grille) Shipped Dimensions: 24" (H) x 20" (W) x 14" (D) Weight: 19 pounds Shipped Weight: 42 pounds Driver Specs: 1” Aluminum Dome Tweeter: FEA-optimized diffuser for airy and unveiled presentation Aluminum dome delivers exceptional transient response and exceptional stiffness/mass ratio 6.5” Woofers: Composite glass-fiber cone with excellent stiffness/mass ratio for high sensitivity and pistonic behavior beyond pass band. Aluminum shorting rings to reduce gap inductance and lower distortion Long stroke motor and suspension for high output Vented voice coil formers to minimize air compression artifacts at high drive levels Crossover & Cabinet Specs: Crossover: 2-way crossover with premium-grade capacitors, air-core inductors and heavy-trace printed circuit boards Crossover frequency and slopes optimized for excellent off-axis polar response, outstanding phase coherency, and total radiated sound power Tweeter-to-woofer crossover: 2 kHz Cabinet: Acoustically transparent and FEA optimized grilles, wedge-shaped front baffle and flush-mounted drivers all contribute to reduced edge diffraction and improved on-axis high frequency response FEA-optimized bracing reduces cabinet resonances