•
Atlas RS2 •
Bachmann
Class 24
•
Walthers
F40PH
The A4X decoder was formerly known as the A1 decoder. The
number was changed to reflect the number of function output
the decoder has.
"X" represents next generation. There are about 20
significant improvements and features added in the "X"
revision. The A4X is a drop-in replacement for the
locomotive light board and uses the original light bulbs.
Its a Four-function Quiet Drive decoder with Dither, a TCS-
exclusive feature that provides superior slow-speed control.