Welcome to South West Digital Ltd  

LokSound 5 Nano DCC


Sound Decoders










Appropriate loudspeakers

With the LokSound 5 Nano DCC, ESU has succeeded in developing an even smaller LokSound decoder: With only 19.6 mm x 8.5 mm x 3.2 mm, it is the smallest LokSound decoder we have ever built. Thus, it should really be used in all vehicles of nominal sizes N and TT.

The LokSound 5 Nano DCC decoder is a pure DCC decoder with open cable ends for free wiring and comes with an 11 x 15 mm "sugar cube" speaker along with sound capsule kit.


The LokSound 5 Nano is a "pure-bred" DCC decoder. 14 to 128 driving steps are as self-evident as 2- and 4-digit addresses. Up to 32 functions can be triggered. Thanks to RailComPlus®, the decoders register fully automatically at a suitable digital center.It masters all DCC programming modes and thanks to RailCom® the CV values can be read out on the main track with suitable control panels. Auxiliary registers exist for control panels that can only program the CVs from 1-255.

The LokSound 5 Nano Decoder detects the Märklin® brake distances as well as ZIMO® HLU / ZACK commands or the Lenz® ABC system. Braking with DCC brake blocks or with equal voltage is also possible. In addition, it also stops with a Selectrix® brake diode. An automatic ABC pen train allows automatic commuting between two stations.

The LokSound 5 Nano can be used on analog DC webs.

The decoder switches "on-the-fly" fully automatically between operating modes. Most of the time, nothing needs to be adjusted.


The LokSound 5 Nano Decoder can play up to 12 channels simultaneously. Each channel can be resolved with up to 16 bits / 31250 kHz and offers hi-fi quality on your system. There is virtually no difference to the original audible anymore. A Class-D audio output with up to 3W output power controls the speakers, which may have between 4 ohms and 32 ohms impedance. A 128 Mbit sound memory provides enough capacity.All individual noises can be adjusted individually in the volume. The super-flexible sound engine without a rigid schedule allows the exemplary simulation of all conceivable rail tracks.


Despite its small size, the LokSound 5 Nano has 6 reinforced function outputs as well as a logic level output as a solder pad. All important lighting functions are available. The brightness of each output can be set separately. The decoder controls the automatic start-up and disconnection when uncoupling for ROCO®, Krois® and Märklin telex ® couplings.


The motor control of the LokSound 5 Nano has a variable PWM clock frequency from 10kHz to 50kHz, which ensures super-quiet operation, especially for bell anchor motors – the typical "hum" is a thing of the past. The load control can be adapted to difficult cases with up to 10 CVs. The unique "Autotune" function allows the decoder to be automatically measured against the motor. The LokSound 5 Nano DCC Direct Decoder delivers up to 0.75A motor power.

Operational reliability

On request, a PowerPack can be connected to the LokSound 5 Nano to bridge dirty rail sections.


Of course, the outputs are protected against overload. We want you to enjoy your decoder for as long as possible.

Ordering information

  Art.No. Description Delivery  
NEW! 58923 LokSound 5 Nano DCC »Blank decoder«, single wires, with loudspeaker 11x15mm, gauge: N, TT Q2/21


                                                                             Copyright © SWD Ltd 2021