GK Neo 115 cabinets

[The Lowe Down]

I have a GK 700RBII and a Neo410 cabinet and I just love the setup. I migrated from a 15" combo to this and I miss just a little low end but the punch is totally worth it. I am thinking about adding a 15" cab to help with the bottom. I noticed GK has a few different Neo115 cabs floating out there. Anyone know the differences? The Neo115 III is the one I can order, but I found an earlier one with different dimensions on closeout. I assume they are using similar drivers, is it just a different cab dimension?

TIA

[birminghambass]

Different dimensions, the II has more volume and low end due to the size of the cab and porting.