Can't help You with the schematics, I wouldn't get my hopes up for finding any either.
Since You have the both amps, it should be very easy to compare them though.
Originally Posted by noiseguy
Also, appears ports on these things are just a hole sawn into the front... no port tube. Where can I get a port tube for these things?
Baffle ports are very common on entry level gear, Peavey for example has been using 'em for decades.
Without modeling the driver, it's impossible to tell whether the baffle port is adequate for that application or not.
It probably is.
If You want/like, you can calculate the box tuning ATM, and using that same tuning as a baseline calculate a tube style port.
With flarings or without.
If You don't hear any scuffing now, the tube won't do much.
If You don't want to change the driver(s), a signal generator and rice will help you to determine the free air resonance of the current driver(s).
That'll help you in the desicion and calculations.