Hi there,interesting cab,is it a 6 x 10" or 6 x 12" ? Looks like a 6 x 10" to me.I don't think it's a Sunn cab. I've never seen a Sunn cab where the grill and baffle board both come off to access the spkrs.The drivers look relatively new though,how does it sound? That's really all that matters anyway,good luck Mel.