Originally Posted by porschejim911
If you were to have a fan and a transponder you would need the 3 channel receiver.
Both radios use the same receiver, the SR3000, so regardless you'd be able to plug in both a transponder and fan into the receiver.
The DX3.0 also offers 4 model memory compared to the DX2.0's 2 model memory. Software programming is identical on each