STLF-10VS | 10" 200W Steel Frame Raw Woofer (Low Frequency Driver), 2" Voice Coil – Sound Town
STLF-18500A | 18" Cast Aluminum Frame High-Power Raw Woofer Speaker, 1000 Watts Pro Audio PA DJ Replacement Subwoofer Low Frequency Driver | Reverb
Doubling the number of woofers provide further +6db of maximum output. Basically they are vertically-sta… | Open baffle speakers, Speaker box design, Speaker design