HT Lab measured Sub2 at 120v they have.
The lower -3 dB at 12 Hz, -6 dB at 11 Hz ; the upper -3dB is at 325 Hz.
對照參考 HT Lab 量測另一牌不錯的 15" subwoofer (power : 1000w)
The lower –3 dB point is at 20 Hz and the –6dB point is at 18 Hz.
The upper –3-dB point is at 270 Hz.—MJP