Hi Jim!
I imagine you will choke and puke when you read this but here goes... 
If you were to build a pair of Song 3A with a rear port instead of a front port what changes would you have to make?
Dave
It is optional. You decide when you order.
Mine are rear ported. I placed them 3ft from the rear wall. Imaging is superb.
I you need them close to the wall then the front port allows that.
