I have an old empty Avatar 210 cab I am wanting to load with some older Kappa Pro 10 16ohm speakers. I am trying to determine if this cab was tuned for Deltas or Kappas. I found a thread that gave basics on port lengths with the different drivers, Neos being the longest, Delta mid length, and Kappa Pro shortest. But it didn't list port depth measurements. http://www.talkbass.com/forum/f15/a...s-delta-vs-neo-here-you-go-hope-helps-201050/ Does anyone know the actual length so I can determine if this is a Kappa tuned cab. This one measure in at 6 1/2".