You need to do your homework. Visit the Bagend website (easily accessed thru A'gon) for information.
Is bagend a reputable company
I just read on the soundandvision website about their new Infra sub 12 which has a claimed +/- 3dB response of 95 to 8 Hz. Yes, that's right 8 Hz. I shot of an email questioning this 8Hz rating and even mentioned that Wilson Audio XS is only rated to 16Hz and that is a coffin sized box with dual 18 woofers. Seems like marketing BS to me so I wondered if they were decent folk who had just mis stepped.