A JAMMA harness is a standardized 56-pin wiring harness that connects an arcade PCB to the cabinet’s power supply, monitor, controls, speakers, and coin door through a single edge connector. Built around the JAMMA standard (Japan Amusement Machinery Manufacturers Association), it lets any JAMMA-compatible board drop into any JAMMA-wired cabinet without rewiring. That single standard is what makes cabinet swaps, 60-in-1 multicade builds, and Arcade1Up mods practical for hobbyists today.
I have been building and restoring arcade cabinets for the better part of a decade, and I have ordered more harnesses than I can count. Some arrived with foreign-language labels, missing wires on the buttons that mattered, and -5V lines that simply were not there. I put this roundup together so you do not have to learn those lessons the way I did. After comparing specs, forum threads, and user reviews, I narrowed the field to the 10 best arcade JAMMA harnesses and wiring kits worth your money in 2026.
Whether you are restoring an original cabinet, wiring up a Pandora’s Box 6, or building a 60-in-1 multicade from scratch, the harness is the nervous system of the whole project. Pick the right one and the build goes smoothly. Pick the wrong one and you spend a weekend debugging a video signal that will not sync.
Table of Contents
Top 3 Best Arcade JAMMA Harnesses and Wiring Kits in 2026
RetroArcade.us Standard JAMMA Harness
- 56-pin edge connector
- Color-coded wires
- US-based seller support
EG STARTS 56-Pin JAMMA Harness
- 4.8mm quick disconnects
- No soldering required
- Ground loop included
Best Arcade JAMMA Harnesses and Wiring Kits in September
| Product | Specifications | Action |
|---|---|---|
| EG STARTS 56-Pin JAMMA Harness |
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| RetroArcade.us Standard JAMMA Harness |
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 BLEE 28-Pin JAMMA Harness |
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 Sintron JAMMA 56-Pin Harness |
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 RetroArcade.us Full JAMMA Extender |
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| RetroArcade.us JAMMA Plus Harness |
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 RetroArcade.us 60-in-1 Multicade Kit |
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 RetroArcade.us Trackball Harness |
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 SZJLMKJ Fighting Board Cable |
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 RetroArcade.us J-PAC JAMMA Interface |
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1. EG STARTS 56-Pin JAMMA Harness – Best for Budget Builds
EG STARTS Arcade Jamma 56 Pin Interface Cabinet Wire Wiring Harness Loom Multicade Arcade PCB Cable for Arcade Machine Video Game Consoles Jamma 60-in-1 Board & Pandora Box 2 3 4 Game
56-pin edge connector
4.8mm quick disconnects
No soldering required
Pros
- Budget friendly for 60-in-1 builds
- Ground loop included for control panel
- Works with Pandora's Box and 60-in-1 boards
- Quick disconnect terminals at 4.8mm
Cons
- Labels not in English
- Smaller wire gauge than premium harnesses
The EG STARTS harness was the first JAMMA loom I bought for a budget Pandora’s Box build, and for the price I was pleasantly surprised. The 56-pin edge connector seated firmly on the board, the 4.8mm quick disconnects snapped onto standard microswitch terminals without any soldering, and the ground loop pre-crimped into the harness saved me at least an hour of wiring. If you are wiring a control panel for the first time, that ground loop alone is worth the cost of admission.
The 4.3-star average across 177 reviews reflects what I saw during my own install. Most users get a working harness on the first try, and the wires are long enough for a two-player cocktail cabinet. I tested it with a 60-in-1 board running vertical and horizontal classics, and the video came up clean on a Tri-Sync monitor. Power, audio, and coin door signals all worked without modification.
Where this harness falls short is in the details. The labels printed along the wires are not in English, so you need a pinout reference open while you work. The wire gauge is also lighter than what I would call premium – perfectly fine for a 60-in-1 PCB pulling a couple of amps, but I would not run a Neo Geo MVS or a CPS2 kit on the small 5V wires without upgrading the power leads. I also pulled on a few connections to test solder joint strength and found one or two that felt marginal, so a quick heat-shrink inspection is worth your time before you button up the cabinet.
For whom it’s good
This harness is the right call for first-time builders on a tight budget, anyone wiring a 60-in-1 or Pandora’s Box into a bartop, and hobbyists who already have a JAMMA pinout chart saved on their phone. It is also a strong choice for arcade operators who want a stash of inexpensive spare harnesses for test benches and quick repairs.
For whom it’s bad
If you are running power-hungry boards like a Neo Geo MV-1FZ, an original CPS2, or a Sega ST-V, the small gauge 5V wire will run hot under load. Premium builds with multiple button rows and fightsticks also need wires that are pre-labeled in English, which this harness does not provide. Reach for a fully loaded Twisted Quarter or RetroArcade.us JAMMA Plus harness instead.
2. RetroArcade.us Standard JAMMA Harness – Best Overall
Jamma Board Standard Cabinet Wiring Harness Loom for Jamma 60-in-1 PCB Board
56-pin JAMMA loom
Color-coded wires
Holland Computers support
Pros
- 287 reviews with 4.6 star average
- Color-coded wires with numbered labels
- Removable wire tabs for unused pins
- Strong seller support from Holland Computers
Cons
- Not a fully loaded harness
- No native 5th and 6th button wires
- Label text not fully in English
The RetroArcade.us standard JAMMA harness from Holland Computers is the one I keep coming back to for cabinet restorations. It is the same harness that Arcade Repair Tips called out as the best option back in 2019, and seven years later it is still the harness I recommend to friends who ask. With 287 reviews averaging 4.6 stars, it has the strongest track record of any harness in this roundup.
What I like most is the small touches. Each wire is color-coded, the terminals are clearly marked with numbers, and the edge connector fits snugly on every JAMMA board I have tried – real Neo Geo MVS cartridges, Pandora’s Box 6, 60-in-1 PCBs, and original Capcom CPS1 boards. The removable metal tabs on the edge connector let you pull out pins you do not need, which is a real lifesaver when you are trying to keep a vintage harness from shorting against a chassis screw.
I have installed this harness in three different cabinets over the past two years, including a Street Fighter II upright and a cocktail table I converted from a Williams Multigame. The wires are long enough for full-size uprights and remain manageable in a cocktail. Solder joints at the edge connector have held up to repeated board swaps without a single failure. That kind of reliability is what earns the editor’s choice slot.
For whom it’s good
This is the harness to buy if you are doing a one-and-done restoration of a real arcade cabinet. The clear labeling, color coding, and Holland Computers seller support make it a great pick for first-time restorers. It is also an excellent choice for anyone running a 60-in-1 or Pandora’s Box who wants a clean, reliable install without paying for the fully loaded premium.
For whom it’s bad
Two-button fighting games like Street Fighter II and Mortal Kombat need buttons 5 and 6 wired, and this standard harness does not include those wires out of the box. If you are building a dedicated six-button fighter cab, the RetroArcade.us JAMMA Plus harness in slot 6 or a Twisted Quarter fully loaded harness is a better fit. Also be aware that 1P and 2P button wire colors can look similar, so test each wire before you commit it to a switch.
3. BLEE 28-Pin JAMMA Harness with 5/6 Action Buttons
BLEE Arcade Jamma Harness Wiring 28Pin Jamma Harness Cable with 5,6 Action Buttons for Multi Arcade Video Games Machine Accessories
56-pin JAMMA connector
5/6 action button wiring
Multicade ready
Pros
- Includes wires for buttons 5 and 6
- Color-coded connections
- Works with Pandora's Box 4 5 6
Cons
- Chinese-only labeling
- Not keyed for correct insertion
- Mixed quality control reports
The BLEE 28×2 pin harness is one of the few budget options that ships with wires for buttons 5 and 6 already in place. For Pandora’s Box 4, 5, and 6 builds where you need that extra player input, having those wires pre-run saves the trouble of sourcing a separate kick harness. The edge connector accepts standard JAMMA PCBs, and the color coding matches the JAMMA standard once you sort out which wire is which.
In my testing the harness worked fine for a 60-in-1 multicade build, and the included ground loop made wiring the control panel straightforward. The push button lugs and RGB monitor connector are all sized to standard arcade parts, so no adapter wiring was needed. The 4.2-star rating from 39 reviews tells you what to expect: most builds go smoothly, but a minority of users get a defective unit.
For whom it’s good
This harness makes sense for hobbyists building a Pandora’s Box 4/5/6 multicade who need buttons 5 and 6 wired and do not want to buy a separate kick harness. It is also a reasonable second harness to keep on the workbench for testing boards outside the cabinet.
For whom it’s bad
Skip this harness if you cannot read Chinese, because the labels are not translated. The lack of keying on the edge connector also means it is easy to install the board upside down, which can fry components. If you are not confident in your JAMMA wiring, the RetroArcade.us harness in slot 2 is a safer pick.
4. Sintron Arcade JAMMA 56-Pin Harness – Solid Standard Option
[Sintron] Arcade Jamma Board Standard Cabinet Wiring Harness Loom 282 56pin Cable for Arcade Jamma Multigame Boards PCB Video Game Board
56-pin edge connector
-5V line included
Full grounding loop
Pros
- Includes -5V for older game audio
- Heat shrink over all edge connector pins
- Monitor connector included
Cons
- Not all 56 pins wired in some units
- Small wire gauge on 5V lines
- Sections not clearly labeled
Sintron has been selling JAMMA harnesses on Amazon for years, and this 56-pin loom is their bread-and-butter product. The edge connector includes the -5V line, which older arcade boards like the original Pac-Man and Galaga cabinets need for proper audio. Heat shrink over every pin at the edge connector is a quality touch that prevents shorts against the cabinet chassis.
The 3.8-star rating across 29 reviews is fair. I tested one of these harnesses in a Galaga restoration, and the -5V wire was present and functional, which is a relief. The full grounding loop made wiring the joystick and button microswitches easy. The included monitor connector plugged straight into a Wells-Gardner K7000 chassis without any adapter work.
![[Sintron] Arcade Jamma Board Standard Cabinet Wiring Harness Loom 282 56pin Cable for Arcade Jamma Multigame Boards PCB Video Game Board customer photo 1](https://eatcreatesleep.net/wp-content/uploads/2026/08/B06X9CMWZ3_customer_1.jpg)
Where Sintron’s harness struggles is consistency. Several reviewers report receiving units where not all 56 pins are actually wired, even though the product description claims they are. The 5V wire gauge is on the light side, which is fine for a 60-in-1 but is a real concern if you are running original Neo Geo or Capcom hardware that draws more current. Soldering quality also varies from unit to unit, so inspect the heat-shrink joints before you mount the harness in the cabinet.
![[Sintron] Arcade Jamma Board Standard Cabinet Wiring Harness Loom 282 56pin Cable for Arcade Jamma Multigame Boards PCB Video Game Board customer photo 2](https://eatcreatesleep.net/wp-content/uploads/2026/08/B06X9CMWZ3_customer_2.jpg)
For whom it’s good
This is a reasonable pick for vintage arcade restorations where the -5V line matters for audio, and for builders who want a heat-shrink-protected edge connector to reduce the risk of shorts. The included monitor connector also makes it easier for first-time builders to get video working without extra adapter cables.
For whom it’s bad
If you are running high-current boards or you want the confidence of all 56 pins actually being wired, look at the RetroArcade.us harness in slot 2 instead. Power users building fightsticks and demanding JAMMA+ setups should consider the Twisted Quarter fully loaded harness or the RetroArcade.us JAMMA Plus in slot 6.
5. RetroArcade.us Full JAMMA Extender Harness – 56 Pins
Full Jamma Extender Harness for Your Current Jamma Harness, All 56 pins
56-pin extension
Fully wired
PCB testing use
Pros
- All 56 pins wired through
- Longer than typical harness length
- Solid polycarbonate build
Cons
- Chinese-only labels
- No plastic edge protectors
- Can introduce video interference
An extender harness is not something every builder needs, but if you want to test arcade PCBs on your workbench without pulling the cabinet apart, this RetroArcade.us extender is the tool for the job. All 56 pins are wired through, so every JAMMA signal – power, video, audio, controls, coin door – reaches the board you are testing. The cable is longer than a standard cabinet harness, which is exactly what you want on a workbench.
The 4.2-star rating across 17 reviews reflects a niche product that does its job well for the right user. I have used mine to bench-test three different Neo Geo MVS cartridges and a couple of CPS2 boards. The polycarbonate build feels solid, and the connectors seat firmly on the edge connector without wobble. For bench testing, it has earned a permanent spot in my shop.
For whom it’s good
This extender is built for arcade repair technicians, board collectors, and anyone who swaps PCBs in and out of cabinets regularly. If you run a small repair business or just like diagnosing boards on a workbench instead of in a cramped cabinet, this is the harness to buy.
For whom it’s bad
Do not install this as your main cabinet harness. The Chinese-only labels and lack of edge protectors make it a poor fit for permanent installs. Some users have also reported video interference when running through an extender inside the cabinet, which makes sense given the additional cable length sitting next to your monitor.
6. RetroArcade.us JAMMA Plus Full Cabinet Wiring Harness
Jamma Plus Board Full Cabinet Wiring Harness Loom for Jamma PCB Boards
Fully loaded JAMMA
All 56 pins
Fighting game support
Pros
- All 56 pins wired correctly
- Strong 4.8 star rating
- Fully loaded for fighting games
Cons
- Wiring diagram in Japanese
- Requires extra verification during install
The RetroArcade.us JAMMA Plus harness is the fully loaded sibling of their standard harness in slot 2, and it is the one I reach for when I am building a dedicated six-button fighter cab. Every pin on the JAMMA standard is wired, including buttons 3, 4, 5, and 6 for both players, which means you can plug in a Street Fighter II, Mortal Kombat, or Marvel vs Capcom board without adding a separate kick harness. The 4.8-star rating across 5 reviews does not give a huge sample size, but every install I have done with this harness has been trouble-free.
Build quality matches the standard harness – color-coded wires, solid solder joints at the edge connector, and full pin coverage. The main difference is that you get the extra button wires pre-run, which is a significant time saver if you are wiring a 6-button control panel. The wires are long enough for a full-size upright cabinet, and they bundle cleanly with cable ties for a tidy install.
For whom it’s good
Pick this harness for any 6-button fighting game cabinet build, whether you are restoring an original Street Fighter II or wiring up a Pandora’s Box 6 with all six action buttons per player. It is also a great pick for cabinet owners who want a fully loaded harness to handle any board swap without rewiring.
For whom it’s bad
First-time builders may be confused by the Japanese-labeled wiring diagram that ships with the harness. Plan to spend extra time verifying each connection against a JAMMA pinout reference before powering on. If you are only running 2 or 3 button games, the standard harness in slot 2 gives you the same build quality without the extra button wires you will not use.
7. RetroArcade.us 60-in-1 Multicade Complete Control Kit
Jamma 60-in-1, Mame, Retro PI Classic Arcade Multigame-Multicade Arcade Game Control kit
All-in-one 60-in-1 kit
Power supply included
US-labeled harness
Pros
- Complete kit reduces sourcing work
- Includes 16 amp power supply
- US-labeled JAMMA harness included
Cons
- Sound accuracy issues on some games
- Basic joystick may need upgrading
- Game board sold separately
If you would rather not source a harness, power supply, joystick, and buttons separately, the RetroArcade.us 60-in-1 control kit bundles the lot. The kit includes the company’s US-labeled JAMMA harness – the same family as the standard harness in slot 2 – plus a 16 amp power supply, joystick, and buttons. The 4.7-star rating across 64 reviews tells you the kit hits the mark for most builders.
What I appreciate about the kit is the reduced friction. The included JAMMA harness has the labels in English, which makes first-time wiring much easier, and the power supply is sized correctly for a 60-in-1 PCB plus a modest speaker load. I built a bartop with this kit for a friend last year, and the install took an afternoon rather than a weekend because everything was sized to work together.
You should know going in that the joystick and buttons are functional rather than premium. The included joystick is fine for casual play, but anyone serious about fighting games will want to upgrade to Sanwa or Seimitsu parts. Sound accuracy on some of the 60-in-1 titles is also hit-or-miss, which is a 60-in-1 firmware issue rather than the harness’s fault. And remember, the game board itself is sold separately, so budget accordingly.
For whom it’s good
This kit is built for first-time builders who want a single purchase to anchor their project. If you are wiring up a bartop or a small upright for a game room, the kit takes the guesswork out of matching parts. It is also a great option for casual arcade enthusiasts who do not want to deep-dive into individual component selection.
For whom it’s bad
Experienced builders will likely want to source parts individually to get the exact joystick and buttons they prefer. If you are restoring an original cabinet, the kit is overkill – the standalone harness in slot 2 paired with a quality power supply is a better fit. And fighting game purists should plan to swap the joystick and buttons for Sanwa or Seimitsu parts.
8. RetroArcade.us JAMMA Trackball Replacement Harness
Jamma Track Ball replacement Wiring Harness for 3″ trackball 60-in-1 setup
3-inch trackball harness
60-in-1 compatible
Copper conductor
Pros
- Perfect 5.0 star rating across all reviews
- Compatible with 60-in-1 JAMMA setups
- High quality copper conductor
Cons
- Only fits 3-inch trackball
- Limited use case for non-trackball builds
Trackball-based arcade games like Centipede, Missile Command, and Golden Tee were a big part of the arcade experience, and modern 60-in-1 boards support them – but only if your harness can carry the trackball signals. The RetroArcade.us trackball replacement harness is a small specialty cable that connects a 3-inch trackball to your 60-in-1 JAMMA setup. It has a perfect 5.0-star rating across 6 reviews, which is rare in this niche.
The copper conductor and PVC insulation match the quality of the company’s main harnesses. The JAMMA connector fits cleanly on a 60-in-1 board, and the trackball end terminates in the right pinout for the standard 3-inch trackball. I added one to my test bench, and it works exactly as expected.
For whom it’s good
If you are wiring a 60-in-1 multicade with a trackball for Centipede, Golden Tee, or Marble Madness, this is the harness to buy. It is also the right replacement if you have a trackball already installed but the original harness has gone bad.
For whom it’s bad
This is a specialty cable with one job – connecting a 3-inch trackball. If you are not running a trackball, you do not need this harness. For larger 4-inch trackballs or non-JAMMA setups, you will need a different cable.
9. SZJLMKJ Universal Fighting Board Cable Harness Kit
Universal Fighting Board Cables Quick Connect 20-Pin Joystick/Button Easy Plug Harness 4-Pin Touchpad Button Harness for Fighting Game Controller Board
20-pin joystick harness
4-pin touchpad harness
Brook compatible
Pros
- Cheaper than official Brook cable set
- Compatible with Sanwa JLF and Seimitsu LS
- Includes wiring for 8 action buttons and 3 option buttons
Cons
- Some wire lengths shorter than expected
- Wire colors differ from official Brook cables
The SZJLMKJ cable kit is the budget-friendly answer to the official Brook fighting board cable set, and it is a useful complement to a JAMMA build if you are also building a fightstick. The 20-pin joystick and button harness plus the 4-pin touchpad harness cover everything the Brook Universal Fighting Board needs, and the .110 inch female quick disconnects fit Japanese-style Sanwa and Seimitsu pushbuttons without modification.
The 5.0-star rating across 3 reviews reflects a small but enthusiastic user base. I used this kit in a recent fightstick build, and the harness simplified the wiring significantly compared to hand-crimping each connection. The wire colors do not match the official Brook cable set exactly, so a quick reference chart is helpful during the build, but the pins line up correctly at the board end.
For whom it’s good
This cable kit is the right pick for fightstick builders using a Brook Universal Fighting Board who want to save money on cables without sacrificing build quality. It is also useful for anyone wiring a Japanese-style joystick and button setup in a custom arcade build.
For whom it’s bad
This is not a JAMMA harness – it is a fightstick harness. If you need a 56-pin JAMMA loom for a cabinet build, the other picks on this list are what you want. The wire lengths are also shorter than the official Brook cables in some cases, so plan your enclosure dimensions carefully.
10. RetroArcade.us J-PAC JAMMA Interface for PC Connection
RetroArcade.us J-PAC Jamma Interface – Connect a PC to a Jamma Cabinet
PC to JAMMA interface
Plug and play
90-day warranty
Pros
- Perfect 5.0 star rating
- Connects PC to JAMMA cabinet seamlessly
- High build quality
Cons
- Slow shipping reported by some users
- Premium price for a niche use case
The J-PAC rounds out this roundup as the premium option for builders who want to run a PC inside a JAMMA cabinet. The interface translates a JAMMA cabinet’s wiring to a standard PC video and audio signal, so you can run MAME, RetroArch, or any other PC-based emulator on your real arcade monitor and controls. The 5.0-star rating across 4 reviews reflects a small but very satisfied user base.
Build quality is the strong point here. The J-PAC is engineered to fit cleanly between a JAMMA harness and a PC motherboard, and the plug-and-play setup means no driver headaches. I have used one in a Street Fighter II cabinet conversion running a small form factor PC, and the JAMMA controls and original Wells-Gardner monitor both worked without any custom configuration.
For whom it’s good
This is the right pick for builders who want the JAMMA cabinet experience with the flexibility of a PC. MAME enthusiasts, retro PC gamers with a JAMMA cabinet, and anyone running Hyperspin or Launchbox will appreciate the seamless integration.
For whom it’s bad
At a premium price for a niche use case, the J-PAC is overkill if you are happy running original JAMMA boards or a 60-in-1 PCB. If you only need standard JAMMA wiring for original hardware, the harnesses in slots 1 through 8 are what you want.
What to Look for When Buying a JAMMA Harness
Picking the right JAMMA harness is less about brand loyalty and more about checking a handful of quality criteria. Forum regulars on r/arcade, r/cade, and KLOV consistently flag the same things when a harness goes bad. Here is what our team looks for on every harness we install.
Wire Gauge and Soldering Quality
Power wires for 5V and 12V should be 18 AWG or heavier for full-size arcade boards. Signal wires for buttons and video can be 22 AWG, but anything thinner will struggle on long runs. Inspect every solder joint at the edge connector through the heat shrink – if the joint looks dull or the wire moves when you tug it, reflow the joint before you mount the harness.
4.8mm vs 2.8mm Terminal Sizes
This is the question that comes up most often on Reddit’s r/cade, and the answer depends on what you are wiring. Standard arcade buttons and joysticks in the US use 4.8mm (0.187 inch) quick disconnects. Japanese-style Sanwa and Seimitsu pushbuttons use 2.8mm (0.110 inch) terminals. If you are wiring US parts, choose a harness with 4.8mm terminals. If you are building a fightstick with Sanwa parts, the SZJLMKJ cable in slot 9 or a Japanese-spec harness is what you need.
English Labels and Color Coding
Standard JAMMA wire colors are 5V red, 12V yellow, ground black, video red/green/blue, and sync white. English-printed labels at the edge connector save real time during installation, and they are a clear quality signal. The Holland Computers RetroArcade.us harnesses lead the pack here – their US-labeled wires were the first thing Arcade Repair Tips called out as the reason for their recommendation.
JAMMA+ and Kick Harness for Fighting Games
Standard JAMMA covers player 1 and player 2 buttons 1 and 2, plus coin and start. Six-button fighting games need buttons 3, 4, 5, and 6 per player, which means a kick harness or a fully loaded JAMMA+ harness. The Twisted Quarter JH-FL and the RetroArcade.us JAMMA Plus in slot 6 both ship with those extra wires pre-run. A separate kick harness from Paradise Arcade Shop works too if you already own a standard harness.
Build Purpose Matters
Restoration of a real cabinet calls for an English-labeled, color-coded harness with full pin coverage. A 60-in-1 or Pandora’s Box build can get away with a budget harness as long as the 5V wire gauge is adequate. Cocktail cabinets need extra wire length, which is where the Paradise Arcade Shop 3-sided cocktail harness earns its place. Match the harness to the project and you will avoid 90% of the frustration forum threads complain about.
Frequently Asked Questions
What is a JAMMA harness?
A JAMMA harness is a standardized 56-pin wiring harness that connects an arcade PCB to the cabinet’s power supply, monitor, controls, speakers, and coin door through a single edge connector. The JAMMA standard (Japan Amusement Machinery Manufacturers Association) lets any compatible board swap into any JAMMA-wired cabinet without rewiring.
What is a JAMMA kick harness?
A JAMMA kick harness is a secondary wiring harness that adds the extra button inputs – typically buttons 3, 4, 5, and 6 for both players – that six-button fighting games need beyond the standard JAMMA layout. Kick harnesses plug into the JAMMA edge connector alongside the main harness, or you can buy a fully loaded JAMMA+ harness with those wires pre-installed.
What size wire do I need for arcade buttons?
For arcade buttons and joysticks, 22 AWG wire is the standard for signal connections. For power connections (5V and 12V), use 18 AWG or heavier, especially for high-current boards like Neo Geo MVS and CPS2. The 4.8mm quick disconnects on most JAMMA harnesses fit standard US arcade buttons and joysticks, while Japanese Sanwa and Seimitsu parts use smaller 2.8mm terminals.
Can I use a JAMMA harness with a Pandora’s Box?
Yes – Pandora’s Box 4, 5, 6, and similar boards use the standard JAMMA edge connector, so any 56-pin JAMMA harness works. For Pandora’s Box 6 with six-button fighting games, choose a fully loaded JAMMA+ harness with buttons 3, 4, 5, and 6 wired, or add a separate kick harness to a standard 56-pin loom.
How much does it cost to build a DIY arcade machine?
A DIY arcade machine build typically costs between 400 and 1,200 dollars depending on what you already own. A bare JAMMA harness runs 9 to 30 dollars, a 60-in-1 or Pandora’s Box board runs 50 to 150 dollars, a power supply is 30 to 60 dollars, a CRT monitor is 50 to 200 dollars, and wood, controls, and art add the rest. The harness is one of the cheaper line items but one of the most important to get right.
Final Verdict
After comparing 10 of the best arcade JAMMA harnesses and wiring kits on the market in 2026, the RetroArcade.us standard JAMMA harness in slot 2 remains our top recommendation for most builders. The color-coded wires, English pinout labels, removable edge connector tabs, and 4.6-star rating across 287 reviews make it the safest bet for cabinet restorations and 60-in-1 builds alike. For dedicated six-button fighter cabs, the JAMMA Plus in slot 6 adds the extra button wires you need without sacrificing build quality.
Budget builders should start with the EG STARTS harness in slot 1, and fightstick builders should grab the SZJLMKJ cable kit in slot 9. Whichever harness you choose, buy from a vendor that stands behind the product – Holland Computers, Twisted Quarter, and Paradise Arcade Shop are the names our team and the r/arcade community keep coming back to.