The future of speed control is here

Mtroniks digiSound702 Class40

  • 702
  • Manual
  • Wiring
  • £299.99
  • No set up needed
  • Class 40 sound
  • 6 to 12V  Operation
  • Speaker included

loco sound module. Full description

You may also consider

  • Description
  • Delivery and Returns

The digiSOUND702 - CLASS 40 is a high grade sound module from Mtroniks for larger scale models that comes with the Class 40 engine sound installed, the engine sound is stored on a user changeable microSD card. This allows the user to swap and change engine sounds with any of the engine sounds available from the Mtroniks Ltd. sound library, these are available to purchase direct from the Mtroniks website.

Each of the different sounds available for use with the digiSound 702 come complete with an engine start up sequence, and engine shutdown sequence and a respective horn. The horn sound and type will vary depending on the locomotive engine sound you choose. After the engine start sequence the sound module will track the RPM of your locos motor and adjust the engine sound to suit the speed, giving a very realistic, real world sound to your model.

The engine start, engine shutdown and horn functions can all be controlled via our optional relay board or if you already have one of our DCi/ACi locomotive speed controllers, all the functions can be controlled from the speed controllers handset as standard.

The digiSound 702 comes complete with a built in amplifier and a high quality speaker allowing for very realistic sound reproduction which is further enhanced by the addition of tone control.


All engine sounds are recorded in CD, 16bit quality from the original locomotives.

The DigiSound702 is a special order item. If you require next day delivery please phone in advance of making your order on-line.


Technical Specification

Product Type Sound System
Model Type Model Locomotive
Operating Voltage Maximum 12.0 Volts
Battery Type NiCAD/NiMH/Lead Acid/LiPo
Lipo safe Yes
Digital sound 16-Bit
SD Card compatibility Pre Jan 2017 - 2GB, Post Jan 2017 - 2GB or 4GB
Engine sound Class40
Speakers included 1
Speaker size 135.0mm diameter
Speaker Impedance 4 to 8 ohms
Motor Type Brushed/Brushless
Wiring loom included Yes
Power Output 25W
Dimensions L95.0mm x W80.0mm x H16.0mm
Weight 280.0g
Delivery & Returns


If the item is in stock we aim to despatch all orders within two working days (Monday to Friday). If any item is not in stock, please allow up to 14 days for delivery. For special order items, please allow 21 days delivery.

All goods sent within the UK are sent by Royal Mail or UPS and we aim for delivery within 3 working days. Overseas delivery may take a little longer and may be subject to delay in customs. Deliveries may be subject to import duties and taxes and the burden lies with the purchases to satisfy charges subsequently incurred.

Returns & Exchange Policy

At Mtroniks we want you to be totally happy with everything you purchase from us. If you have a problem it is very helpful to us if you Indicate what the problem is and whether you require us to take a look at it for you. We cannot refund to you if you do not have your purchase details!

If any of your items are faulty please let us know immediately on 01943 461482 or by emailing to and return them straight to us at the address below and we will exchange it for you as quickly as possible.

Please send your returns to:
Mtroniks Ltd.
41A Ilkley Road
West Yorkshire
LS21 3LP


1 item(s) added to your compare list