K27_463· Premium Member
It is quite possible to install Straight DCC in the open cab shay. i have done full onboard batteries, p5 and Airwire in a bunch of them . I have a custom speaker which is a snug perfect fit in the bottom brass turning of the t Boiler. The only complication is that you need to move the lighting regulator to fit the speaker. The upper portion of this boiler and the front of the smokebox area will have enough room for a 2-3 amp DCC decoder. There is no room in the bunker in back since the motor is vertical and uses up the space there. Once the boiler is sealed up again the sound is outstanding.