HO. Made for smaller boxes. Is the simple answer I think. But someone will be along to model it soon I’m sure.
Maybe a possibility for a higher excursion driver to work in this box if you wanting to push loads of power and go lower but I don’t know really.
Safe bet is the HO but it won’t go massively low. Then again neither does the q100 driver so you should get a decent upgrade with the HO
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