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latest news
26thFeb2026
Creators of authentic British digital model railway sounds for Zimo DCC decoders

Next show at Calne 11/12th April
Pre-order to collect, or we are loading sounds on the day


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BLANK Sound Decoders (with factory/test sound only)

Prices listed below are for factory-default decoders. Speaker is not normally included unless explicitly stated.

STANDARD Sized Sound Decoders - for small O, and OO
Zimo MS450 SIZE: 30x15x4mm
MOTOR: 1.2A continuous / 2.5A peak
STAYALIVE: Unlimited 16V direct
(1000uF sample cap included)
INTERFACE: 8pin wired, PluX22 Direct
AUDIO: 3W @ 4 to 8 ohm
OUTPUTS: 10 functions
FOR: OO and O		 More Information
MS450R8-pin Wired
(R)		Add to basket
£120

MS450P22PluX22 Direct
(P22)		Add to basket
£115

Zimo MS440 SIZE: 30x15x4mm
MOTOR: 1.2A continuous / 2.5A peak
STAYALIVE: Unlimited 16V direct
(1000uF sample cap included)
INTERFACE: 21pin Direct
AUDIO: 3W @ 4 to 8 ohm
OUTPUTS: 10 functions
Switchable between C and D types
FOR: OO and O		 More Information
MS440C21-pin Direct
(C)
FA3-6 logic-level		Add to basket
£115

MS440D21-pin Direct
(D)
FA3-6 full-power		Add to basket
£115

MICRO Sized Sound Decoders - for small OO, TT120 and N
Zimo MS481 SIZE: 19x11x3.1mm
MOTOR: 0.8A continuous / 1.5A peak
STAYALIVE: Max 1000uF/16V direct or more via LifeLink or STACO
(1000uF sample cap included)
INTERFACE: 8pin wired, 6pin wired. PluX16 Direct
AUDIO: 3W @ 4 to 8 ohm
OUTPUTS: 6 full power functions
FOR: N, TT120, OO and smallest O		 More Information
MS481R8-pin Wired
(R)		Add to basket
£120

MS481F6-pin Wired
(F)		Add to basket
£120

MS481P16PluX16 Direct
(P16)		Add to basket
£115

Zimo MS581 SIZE: 24.9x10x4mm
MOTOR: 0.8A continuous / 1.5A peak
STAYALIVE: Limited on-board (not G type) or unlimited 5V caps direct or up to 1000uF/16V via solder pads, or unlimited 16V via LifeLink or STACO
INTERFACE: Next18 Direct plug-in
AUDIO: 3W @ 4 to 8 ohm
OUTPUTS: 6 full power functions
FOR: N, TT120, OO and smallest O		 More Information
MS581N18Next18 Direct
(N18)
some onboard stay-alive		Add to basket
£115

MS581N18GNext18 Direct
(N18G)
includes 2x mini GoldCaps		Add to basket
£115

NANO Sized Sound Decoders - for smallest OO, TT120 and N
Zimo MS491 SIZE: 19x7.8x2.8mm
MOTOR: 0.7A continuous / 1.5A peak
STAYALIVE: Max 1000uF/16V direct or more via LifeLink or STACO
(1000uF sample cap included)
INTERFACE: 8pin wired, 6pin wired, 6pin Direct
AUDIO: 1W @ 8 ohm
OUTPUTS: 5 full-power functions
FOR: N, TT120 and small OO		 More Information
MS491R8-pin Wired
(R)		Add to basket
£120

MS491F6-pin Wired
(F)		Add to basket
£120

MS491N6-pin Direct
(N)		Add to basket
£115

Zimo MS500 SIZE: 14x10x3mm
MOTOR: 0.7A continuous / 1.5A peak
STAYALIVE: Max 1000uF/16V direct or more via LifeLink or STACO
(1000uF sample cap inlcuded)
INTERFACE: 8pin wired, 6pin wired, 6pin Direct
AUDIO: 1W @ 8 ohm
OUTPUTS: 4 functions
FOR: N, TT120 and smallest OO		 More Information
MS500R8-pin Wired
(R)		Add to basket
£120

MS500F6-pin Wired
(F)		Add to basket
£120

MS500N6-pin Direct
(N)		Add to basket
£115

Zimo MS591 SIZE: 15x9.3x3.1mm
MOTOR: 0.7A continuous / 1.5A peak
STAYALIVE: via solder pads to LifeLink or STACO
INTERFACE: Next18 Direct
AUDIO: 1W @ 8 ohm
OUTPUTS: 6 functions
FOR: N, TT120 and smallest OO		 More Information
MS591N18Next18 Direct
(N18)
some onboard stay-alive		Add to basket
£120

Zimo MS540 SIZE: 19x8.7x2.8mm
MOTOR: 0.8A continuous / 1.5A peak
STAYALIVE: Max 1000uF/16V via solder pads, or unlimited 16V via LifeLink or STACO
INTERFACE: E24 Direct
AUDIO: 1W @ 8 ohm
OUTPUTS: 8 full power functions
FOR: N, TT120 and small OO		 More Information
MS540E24E24 Direct
(E24)		Add to basket
£115

LARGE Sound Decoders - for O and above
Zimo MS950 SIZE: 50x23x15mm
MOTOR: 4A continuous / 10A peak
STAYALIVE: Big stay-alive on-board!
INTERFACE: Pins to plug into 'L' type interface
AUDIO: 2x 3W @ 4 to 8 ohms
OUTPUTS: 11 functions
FOR: O and larger		 More Information
MS950Large scale plug-in
(L)
34 pins		Add to basket
£165

LOK950P'L' type adapter plate to take MS950 decoder
61x25x10mm
Solder pads		Add to basket
£15

LOK950K'L' type adapter plate to take MS950 decoder
75x25x10mm
Screw Terminals		Add to basket
£25

MS950LOKPLarge scale sound decoder
Pins for 'L' type socket
Combi-package supplied with LOK950P adapter plate
61x25x15mm (combined height)		Add to basket
£180

MS950LOKKLarge scale sound decoder
Pins for 'L' type socket
Combi-package supplied with LOK950K (screw terminal) adapter plate
75x25x10mm (combined height)		Add to basket
£190

Zimo MS990 SIZE: 50x40x13mm
MOTOR: 6A continuous / 10A peak
STAYALIVE: Huge stay-alive on-board!
INTERFACE: Screw terminals, or pins to plug into 'XL' type interface
AUDIO: 2x 10W @ 4 to 8 ohms
OUTPUTS: 15 functions (2A total max)
SERVOS: 6 servo connections
additional low voltage outputs for 1.5A, 0.5A and 2A
4 switch inputs
FOR: O and larger		 More Information
MS990KLarge scale
(XL)
Screw terminals		Add to basket
£210

MS990LLarge scale
(XL)
Pins for 'XL' type socket		Add to basket
£200

LOK990P'XL' type adapter plate to take MS990L decoder
62x45x10mm
Solder pads for all connections		Add to basket
£15

MS990LOKPLarge scale sound decoder
Pins for 'XL' type socket
Combi-package supplied with LOK990P adapter plate
Total height plugged in is 18mm		Add to basket
£215

SPECIAL Design Sound Decoders - for specific models and situations
Zimo MS560 SIZE: 27x14x2.6mm
MOTOR: 0.7A continuous / 1.5A peak
STAYALIVE: Use LifeLink or STACO via solder pads
INTERFACE: Kato slide-in board (IET 800, Eurostar etc.)
AUDIO: 1W @ 8 ohm
OUTPUTS: 4 full power functions
FOR: N Kato		 More Information
MS560Kato-style
N Gauge sound decoder		Add to basket
£115
limited stock available

FUNCTION Sound Decoders (sound and lights, but no motor output)
Zimo FS850 Sound/Function Decoder
No Motor		 SIZE: 21x15x3.6mm
MOTOR: NONE (sound and function only)
STAYALIVE: Unlimited 16V direct
INTERFACE: 8pin wired, PluX22 Direct
AUDIO: 3W @ 4 to 8 ohm
OUTPUTS: 10 functions
FOR: OO, O and scenic		 More Information
FS850R8-pin Wired
(R)		Add to basket
£65
pre-order

FS850P22PluX22 Direct
(P22)		Add to basket
£60
pre-order

REPLACEMENT sound decoders
Replacement Zimo N/OO MX6*/MS4*/5* series Sound Decoder (small)Replacement Zimo N/OO MX6*/MS4*/5* series Sound Decoder (small)Send back your damaged Zimo sound decoder for immediate replacement
Contact YouChoos with required project and details
Like-for-like.
Small scale decoders
Includes re-load (YouChoos or free projects) and new doc pack.		Add to basket
£30

Replacement Zimo N/OO MX69*/MS9* series Sound Decoder (large)Replacement Zimo N/OO MX69*/MS9* series Sound Decoder (large)Send back your damaged Zimo sound decoder for immediate replacement
Contact YouChoos with required project and details
Like-for-like.
Large scale decoders
Includes re-load (YouChoos or free projects) and new doc pack.		Add to basket
£40


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