QSI 2805-500 PLEASE STATE WHICH LOCOMOTIVE YOU NEED SOUND FOR.

I recently added the QSI Quantum plug and play AristoCraft sound unit to my AristoCraft GP-40 after talking to the fellows at RLD Hobbies. Installation took about twenty minutes, No splicing or soldering. Three quick connections with detailed instructions and everything required in the QSI package. I also purchased the QSI Quantum Engineer add on Control System from RLD for my power supply, installation took less than five minutes. Wow what a difference a good sound system makes, not only does it come with all the bells and whistles you would expect from a first class sound system, it also has many other options. the one I like the best is that the Quantum engineer system allows switching direction without turning the power supply and sound off, It also features doppler sounds when the engine approaches and leaves you or an onlooker at the touch of a button. I am very happy with the folks at RLD and the great sounds of the QSI Quantum System and the added features of the QSI Quantum Engineer.