mid top advice

hi, im lookin for a diy midtop to pair with my 15”scoops (x-over @ 110-120hz).
Ideally it should be fairly easy to build, but most importantly it needs to go as low as 120-130, so that in the future i’ll be able to use a dedicated kick but in the meantime in will be enough to pair it with my subs

Any ideas? thank you