Genelec F Two Active White Active subwoofer 150 WActive, 103 dB, 150 W Bass (Class D), 27 85 Hz, 300 x 362 x 362 mm, 8. 5 kg, white The F Two compact subwoofer is designed to complement G Series speakers up to and including the G Four, offering extended, controlled low frequency performance and award winning aesthetic design. Tailored performance The F Two is a little larger than its F One sibling and as a result can extend right down to 27 Hz with a maximum SPL of 103 dB. It shares the F Ones