Hey guys so I know that these are prefabs but they don't look to bad and they actually say what they are tuned to. I was thinking about using one of these for a c2 audio threatcon-2 12" which the manufacturer reccomends a ported box of 1.5 - 2.0 ft^3 @ 35hz. So thses are tuned pretty close at 36 hz and 38 hz. Any opinions on using these? Thanks in advance

Obcon Single 12" Labyrinth Slot Vent Port 1" MDF Subwoofer Speaker Box Enclosure | eBay
Obcon R T 12" Woofer Single Labyrinth Slot Vent Subwoofer Box Enclosure 318 12 | eBay