***The best running quality will always come from two separate decoders with the two units wired together for pickups. I'd use TCS MC-2's for this.
However....
If you really want to use one decoder you may find that unless the two motors are really exactly the same, you will get a degree of undesirable interaction between them, as if one is marginally more efficient than the other they will compete for power and the more efficient will win. Assuming a running current of around 250mA or so, you can still use the TCS MC-2 which is a mini sized decoder that has 1 amp plus motor power handling. I'm confidnt it will be fine!
Just try it with one - and add the other if you find it unsatisfactory!
Richard
DCCconcepts
However....
If you really want to use one decoder you may find that unless the two motors are really exactly the same, you will get a degree of undesirable interaction between them, as if one is marginally more efficient than the other they will compete for power and the more efficient will win. Assuming a running current of around 250mA or so, you can still use the TCS MC-2 which is a mini sized decoder that has 1 amp plus motor power handling. I'm confidnt it will be fine!
Just try it with one - and add the other if you find it unsatisfactory!
Richard
DCCconcepts