Hi everyone today we have a video of our newly modified class 25 proto drive sound project that has been specifically created for the newly released Heljan Class 25.

The new sound file was loaded onto a Zimo MX 644D sound decoder and installed alongside a Alz Soundz 40x20x7D speaker by our workshop team.

To make the red lights operate correctly on this model they have been plugged in to CN2 connector on the PCB as indicated on the picture.

The decoder has been set up to allow independent red light operation on F10 using function outputs 1 and 3 on the decoder.

The speaker has been connected to CN6 on the PCB.

Our Heljan Class 25 sound bundle is available via our web shop here [ Ссылка ] or for order over the phone on (01522) 527731.

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