AC adapter question: Duo R & RX

[kitkit.com]

Hi guys,
I am just wondering if it's ok to use Duo R AC adaptor on Duo RX & vice versa.  As far as I know, both system uses Model PAD-129

The only difference is Duo R's input 20VA while Duo RX's input 19VA. Otherwise, both AC adapter are identical. 
I just want to be safe and your input is appreciated.

[nick3092]

I'm not familiar with the power supplies or the voltage requirements of these systems.  But, this is what I do know.  As long as the voltage is the same, the tip polarity is the same, and the amperage is at least equal (or higher) you should be able to.  Voltage you need to be pretty much dead on with.  But if the power supply cranks out more amps than needed, that's fine.  The system will only draw what it needs.