Here is your model. I bumped the power to 1,700 watts since that's what you said was required. As you can see, the port velocities get high near the tuning frequencies. I'm concerned about shuffling at high volumes.
All of your ports should be at least 1/3 of Sd.
1680cm2/3 = 560cm2.
Port 2 needs to be bigger.
Sony XBR65x900e / STR-DN1080 / original PS4 / WOW! Ultra TV / Quantum Access Mini PC Stick w/Windows 10 / 8 x Rockville SPG88 8“ DJ PA Speakers / Dayton Audio SA1000 / Kicker 08S15L74 in a Tapped-Tapered Quarter Wave Tube (negative flare tapped horn).