LokSound XL V3.0 M4 - Big sound for big engines

The LokSound XL V3.0 M4 satisfies the wish of many customers who requested for a decoder that is compatible with mfx®-stations and meant for gauge 1, G. This ESU decoder speaks M4, which offers, when used with corresponding stations, a hundred per cent mfx®-compatible functions.

It has a size of only 1.0mm x 40.0mm x 14.0mm (2.04 x 1.6 x 0.56 inch) it can be installed without any problems. The LokSound XL V3.0 M4 comes in two versions: either with a screwing terminal or a multi-pin connector for specifically prepared locos (Märklin®, Kiss® and KM-1®). The sound desired can be played onto the decoder via the LokProgrammer.

Operational modes

The multi-protocol LokSound XL V3.0 M4 decoder handles M4 and Motorola®. You can use it with all Märklin® stations, such as 6020, 6021 and delta®; or on analog AC layouts. The decoder supports addresses 01 – 255, and stops correctly on the Märklin® braking section. In combination with a mfx® station, such as the Märklin® central station® (all types), but also to the ECoS command station, the decoder will be recognized automatically.

Motor management

The powerful output stage (3.0A continuous-current) will run models with even two prime movers. All known DC- and coreless motors can be used. Load control (back EMF) with 32 kHz High frequency regulation takes care of silky smooth, absolutely silent motor operation, and lets your engines crawl super-slowly on the layout, enabled by a 10-Bit A/D converter.

Analog operation

The LokSound V3.0 XL M4 also works (without sound) on analog AC layouts. Even starter – and top speed can be controlled.


The LokSound V3.0 XL M4 decoder can replay all loco typical sounds. It can record up to 130 seconds of sound in its 16 MBit flash-chip. These are transferred via four polyphonic channels to the 1.5W last stage audio amplifier.


The LokSound V3.0 XL M4 decoder sports six function outputs, which can be allocated individually to function F0 - F15. Besides beacon, strobe and alternate flashing, there is simulated firebox flicker as well as Mars light or Gyra light. All function outputs are individually dimmable.


All parameters of the LokSound XL V3.0 M4 decoder can be modified comfortably with the systems’s stations, right during operation. It´s not necessary to open the loco or to put it onto a „programming track". The built-in genuine duplex communication between systems’s central unit and decoder makes this possible. For owners of 6020®,- 6021® – or delta® stations, the LokSound XL V3.0 M4 decoder utilises the time-proven, simple programming procedure. As an alternative you can comfortably set the decoder on screen via the LokProgrammer.


All function outputs and the motor connection are overload- and short circuit protected. We want you to enjoy your LokSound XL V3.0 M4 decoder for a long time.

Built-in future

LokSound XL V3.0 M4 decoders are firmware updatable: The interne decoder software can be replaced at any time by a new version. You need the LokProgrammer for it.

Variety of sounds

ESU offers many different sounds for the LokSound XL V3.0 M4 decoder, just go ahead and check our substantial sound section.