My UP SD45T-2 #4794 with a Soundtraxx Tsunami TSU-1000 DCC/Sound decoder I recently installed. The horn I selected is a Nathan P3. The tunnel motor is part of Athearn's Ready to Roll series that allows for "easier" DCC upgrading. I had to solder the leads of the decoder onto the circuit board located just above the motor and the speaker sits just below the engine fans. Even though the Tsunami was fairly expensive ($115) it is worth it and I can see why Athearn recently switched from the MRC to Soundtraxx for their future Genesis DCC/Sound locomotives. Video was taken on my Canon SD1100IS at the Golden Gate Model Railroad Club on 7/28/09 at 2:09pm.
