Sound-Motor-Block (SMB)

Simple Conversion to Modern Technology with Bell Armature Motor and Speaker for Digital Sound in N Scale.
Save enormous time with ready-to-use components, almost always without milling or filing work.
Special SMB through justandersson & friends available here.

NEW from January 2024: Analog drivers can now use all our SMBs with sound on their analog layouts. We deliver decoders configured to match your conversion request. Please use the order form and specify "for analog layout" under remarks. We will then discuss the decoder assignment.

You can find conversion basics in this video (and without SMB here). The other locomotive-specific videos address the unique features of each model. The general basics are not repeated continuously there.