Turn it up to 11 with the BIC Venturi Woofer. This PMPO woofer 1-pack has a frequency range of 26 Hz – 180 Hz and an 8 Ohm impedance to give you increased sound output. Listen to deep lows and euphoric highs with a frequency range of sound from 26 Hz-180 Hz. 8 Ohm impedance extracts maximum power so you will get more output from your speakers.