The construction uses all measurements from the 18-Sound Band-Pass cabinet kit for the massive 21" driver - available on the Internet. My other model of the 21" driver fits perfectly when imported into this model. #18Sound #21_inch #21LW1400 #BandPass #cabinet #driver #Eghteen_Sound #EighteenSound21 #Kit #large #loudspeaker #LW1 #LW1400 #professional_speaker #speaker #speakers #sub #sub_woofer #subwoofer #superlarge #Woofer
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