Drivers:
A four-way, four-tower system with a total of 20 drivers per pair of speakers. BilletCore ultra-high-rigidity woofers, mid-woofers and mids. BilletDome ultra-low-distortion tweeter, unique to Sonja XVi

Filters:
Sonja XVi is fully-passive
Proprietary DualCoherent 2™ crossover at 65 Hz, 337 Hz and 1.75 kHz
Designed using software developed in-house
ViseCoil bass inductors reduce residual loss and improve linearity, for greater bass impact and an easier job for most amplifiers
ToroAir mid and tweeter inductors eliminate cross-talk

Sensitivity:
88 dB / 2.83 V / 1 m 2π anechoic

Impedance:
4Ω nominal, 3.5Ω minimum

Dimensions:
4 towers, each 179x43x72 cm (70x17x28”) HxWxD

Weight:
4 towers, each 210 kg (463 lbs) per channel unpackaged Shipping weight of a pair is 1.3 tons