A Class - EMD Sound Decoder — Irish Railway Models Skip to content

A Class - EMD Sound Decoder

Sold out
Original price $172.00 - Original price $172.00
Original price
$172.00 - $172.00
Current price $172.00
Out of stock
LokSound V5 DCC Sound Chip

Designed specifically for the Irish Railway Models A Class locomotive, this decoder works seamlessly with the onboard lighting, PowerPack stay-alive system and dual speaker configuration to reproduce the characteristic sound and function of an EMD engined A class at work.

Click here to download the list of functions [PDF]

This chip is the perfect companion for the EMD Engined versions being produced, which are:

  • 007
  • 017
  • 018
  • A23R
  • 027
  • 036
  • A39R
  • 048
  • 054
  • 056

Common Features:

  • The LokSound 5 decoder works for analogue DC and AC (!) layouts.


    The LokSound 5 decoder can reproduce up to 10 channels simultaneously. Each channel offers up to 16 Bit / 31250 kHz and thus we have finally achieved hi-fi sound quality on your layout. For all practical purposes one cannot detect any difference to the original. A class D audio power amplifier with up to 3W output power feeds the speakers with a permitted impedance of 4 – 32 Ohms. The huge 128 MBit sound memory assures sufficient storage capacity.

    The volume of all individual sound fragments may be adjusted separately. The outstandingly flexible sound engine without a rigid flow chart facilitates a prototypical simulation of all conceivable rail vehicles. Three separately adjustable braking functions and two alternative load scenarios provide you with maximum control of your vehicles.


    We are quite aware that you want your locomotives to be as realistic as possible. Therefore we have packed many function outputs into it.  Subject to the type of interface every LokSound 5 has at least 10 amplified outputs. The decoders with PluX22 or 21MTC interface have an additional 4 outputs for controlling servos or as logic outputs. Of course, all important lighting functions are supported. The brightness of each output may be adjusted separately. The decoder supports the automatic push and pull movements – known as the coupler waltz - required for reliable operation of digital couplers such as the ones by ROCO® and Krois® as well as Telex® couplers.

    Motor control

    Motor control of the LokSound 5 has been further improved. A variable PWM pulse frequency ranging from 10 kHz to 50 kHz assures perfect silent operation, particularly for coreless motors. Thus the typical hum is a thing of the past. Load control can now be adjusted with up to 10 separate CVs and thus will manage even the most difficult cases. The unique “Auto Tune” function facilitates the automatic calibration of the decoder to perfectly match the motor. The LokSound 5 decoder supplies up to 1.5A motor current, which is quite sufficient even for older motor types.

Customer Reviews

Based on 27 reviews
John Keane
A class sound decoder

This is the third purchase of this item. Great sound file. Well done.

Jonathan Kidd
A Class - EMD Sound Decoder

So far I have given it a quick function test on an ESU decoder tester with a LokProgrammer. Presume it will work well in any of my A12, A30, or A55 locos (for a bit of divergence). I don't have an EMD version of the A Class loco to hand at the moment. Hopefully IRM might produce some more in the future...?

Damian B
Beware the DCC Concepts Alpha Meter when reading the decoder

Worked flawlessly and installation couldn’t have been simpler, with the easy to remove top on my A-Class.

I had a little issue with my NCE PowerCab not reading the decoder but the guys at IRM quickly spotted the problem. It was my DCC Concepts Alpha Meter, once I removed this from the equation NCE read the decoder perfectly. Little know problem it seems, but the support team here knew the solution immediately. Excellent all round.

A Class EMD Sound Decoder


Michael Creech
A Class sound decoder

I haven't used it yet as I am waiting to get layout put together. All my purchases are stored in boxes.
I have heard they are excellent!

Billy Maher

Very realistic

James Moran
A Class EMD Sound Decoder ?

Great Realistic Sound of A class EmD Diesel locomotive with Various Sounds with A Choice of Destinations Coupled.with Station Anouncements of where your Train is Heading for and the platform that it is Departing From well Done Great Job purchase one if you Can Before it is too late to do so Buy an A Class loco to Go with it you won't Regret your Investment

john Reid.
EMD Sound Decoder

This really brings the fantastic A class to a whole new level, Brilliant


Top Class. Its as if I was in the presence of the real Ar. I was priviliged to be given a tour of A58r by my late father and Loco Driver Hugh on its first trip from Sligo to Limerick via the Western Rail Corridor. As was said by our shunter on the day "you could eat your dinner off the engine room floor" such was the contrast with the original A. Great memories brought back to life by Irish Railway Models. I wish you continued success.

Brendan Curran
Great sounds

Great selection of quality sounds that bring the locomotive to life

Compare products

{"one"=>"Select 2 or 3 items to compare", "other"=>"{{ count }} of 3 items selected"}

Select first item to compare

Select second item to compare

Select third item to compare