FAQ:Identify a LokSound Multifunction Decoder

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Identify a LokSound Multifunction Decoder

What version am I?

Covers: ESU LokSound Multifunction Decoders, Versions 3.5, 4 and 5.

LokSound V3.5

  • Production: 2005-2010


  • Three integrated circuits across the full width of the PCB
  • Speaker Impedance: 100Ω


  • Dark Blue PCB

LokSound V4

  • Production: 2011-2018


  • Various component layouts
  • Row of solder pads across half of one end of PCB
  • Speaker Impedance: 4 –8Ω


  • Dark Blue

There are a number of variations with respect to this decoder.

LokSound V5

Production: Features:

  • Row of gold–plated solder pads across one end of PCB
  • Speaker Impedance: 4 –8Ω


  • Blue, lighter than previous PCB used by V4.