Fatar Keybeds: The Complete Guide to Synth Keyboard Actions

Fatar keybeds sit under the majority of premium synthesizers on the market, yet almost nobody buys one on purpose. The Italian company works business-to-business, so you never see its name on the box, only under your fingers. If you own a Sequential, a Moog, a Waldorf, a Modal, or a Native Instruments controller, you’re already playing one. This guide covers what the different actions feel like, how to tell them apart, and, in a database of more than 300 instruments, exactly which keybed is in yours.

Key Takeaways

• A Fatar action appears in 276 of the 340 instruments catalogued on this page. The semi-weighted TP/9 family alone covers 105 of them, making it the action you’re most likely playing.
• The TP/8S is the firmer, weighted board many players (myself included) rate as the best semi-weighted synth action made. The TP/9S is lighter and faster.
• Fatar has built keyboard mechanisms since 1956 (Fatar). Most repairs are cheap DIY jobs, and in years of use I’ve never had one fail.

What makes Fatar the default synth keybed?

Fatar has manufactured keyboard mechanisms since 1956, and today its actions turn up in 276 of the 340 instruments catalogued further down this page (Fatar). The name stands for Fabbrica Tastiere Ragni, or Ragni Keyboard Factory, after founder Lino Ragni in Recanati, Italy. Because the company sells almost entirely to other manufacturers, you rarely see the brand, but the odds you’ve played one are overwhelming.

The strength is a modular catalogue. Fatar offers the same chassis in different touch weights, commonly documented as light, medium, and heavy options, plus specialised models for synth, organ, and piano duty. The TP/8S is the headline act: longer black keys, a distinctive “dogleg” key shape, and a textured surface. You’ll find it in instruments like the Access Virus TI, the John Bowen Solaris, and several Waldorf boards, where its build complexity pushes prices well past $3,000.

So why does one Italian supplier dominate a market full of Japanese and Chinese rivals? Consistency. A synth designer who specs a Fatar bed knows precisely how it will feel, key after key, unit after unit. That predictability is worth more to a boutique builder than shaving a few dollars per action. For the wider hardware versus software question, see my take on analog versus digital synthesizers.

TP/8S vs TP/9S: which action actually feels better?

If you remember only two Fatar names, make them these. The TP/8S is the weighted, firmer board; the TP/9S is the light, fast one. I’ve played the TP/9S in four different instruments, the Native Instruments Komplete Kontrol MK2, the Modal Argon 8, the Kurzweil PC3A6, and the GEM Equinox, plus the Access Virus, and the pattern holds every time. The 9S rewards speed. The 8S rewards control. For me, the 8S wins.

TP/9 series (semi-weighted synth)

105

TP/8S / TP/8SK (weighted synth)

29

TP/40 / TP/400 (hammer action)

40

TP/100 / TP/110 (light hammer)

22

TP/7BA (basic synth)

16

TP/8O (organ / waterfall)

8

Legacy TP (10/20/30/41)

44

TP/8 Piano (weighted)

12

Non-Fatar / other OEM

64

That chart isn’t a marketing claim, it’s a count. Across the 300-plus instruments in the database below, the semi-weighted TP/9 family appears 105 times, roughly one in three keyboards, and more than any other action by a wide margin. When people call the TP/9S “the workhorse,” this is what they mean. The TP/8S is rarer and pricier, which is part of why it carries a certain reputation.

Here’s a claim you’ll read often that I don’t buy: that the same Fatar bed feels dramatically different from one brand to the next. In my hands, a stock TP/9S feels like a stock TP/9S whether it’s in a Waldorf or a Modal. The real differences show up only when a maker actively modifies the action, the way Nord reworks its TP/40 boards. Stock to stock, they’re far more alike than the forums suggest.

How do you tell which Fatar version you have?

This matters most for repairs, and it trips people up constantly. The TP/9S exists in two mechanically incompatible generations. The old version (built until 2003) uses rectangular openings below the spring and a locking mechanism you need a screwdriver to release. The current version (since 2003) lets you lift a key straight forward once the spring is off. Keys from one generation won’t fit the other, so identify yours before you order a single part.

Which actions is Fatar still making? As of 2026 the current line covers the TP/9 semi-weighted synth action, the TP/8 weighted boards, the TP/40 and wooden TP/400 Wood hammer actions, the light TP/100, and the newer TP/110, a technopolymer hammer action that weighs around 7 kg and replaces the older TP/100 (Fatar). Discontinued families include the entire TP/40-era flagships that came before, the TP/20 and TP/30 weighted actions, and the legacy TP/10 hammer boards.

Which synths use which Fatar keybed? The full database

The table below catalogues the exact keybed inside more than 300 synthesizers, stage pianos, and MIDI controllers, grouped by manufacturer. It began as a community effort on the German Musiker-Board forum; I have cross-checked it against manufacturer specs and my own instruments, and I keep it current as new gear ships. If a model runs a non-Fatar action (Matsushita, Huaxin, Pratt-Read, Korg RH3), that is noted too, so the list doubles as a keybed-origin reference for the whole industry.

Access

Akai

Alesis

Arturia

Clavia (Nord)

Crumar/G.S.I

Dexibell

Doepfer

Edirol (Roland)

Elektron

E-MU

Ensoniq

ESI

Generalmusic (GEM)

IK Multimedia

John Bowen

Kawai

Korg

Kurzweil

M-Audio

MFB

Modal Electronics (formerly Modulus)

Moog

Native Instruments

Nonlinear Labs

Novation

Oberheim

Quasimidi

Radikal Technologies

Rhodes by Roland

Roland

Sequential Circuits (SCI) – former DSI/Dave Smith Instruments

Solton

Studiologic

Tom Oberheim

U.D.O

Valente

Viscount

Waldorf

Wersi

How does Fatar compare to Yamaha, Roland, Korg and Kawai?

Fatar owns the synth action, but the piano-feel crown belongs elsewhere. A real acoustic grand needs roughly 50 to 60 grams of down-weight to press a key (PianoFinders), and the makers who chase that resistance, Kawai and Yamaha, are piano builders first. That heritage shows the moment you play a demanding classical passage.

Kawai’s Grand Feel wooden actions get closest to an acoustic, with convincing escapement and dynamic control; premium models run from about $1,000 to $6,000. Yamaha spans everything from entry-level GHS to triple-sensor wooden GrandTouch. Roland’s PHA-50 hybrid wood-and-resin action is a genuinely versatile middle ground, though some players find it initially spongy and note it feels heavier than an acoustic. Korg’s RH3 is a solid stage action that can struggle with the softest dynamics.

The takeaway is simple. Want expressive synth and multi-instrument control? Fatar. Want the deepest classical-piano realism? Look to the piano houses. If you’re weighing vintage digital boards while you’re here, my complete Roland JV guide and the Roland Alpha Juno feature go deep on two very different eras of Roland action and sound.

Which Fatar keybed should you buy for?

Match the action to the job. For synth and multi-instrument work, the TP/9S is the industry standard and the safe default. For stage performance, the weighted TP/8S gives you expressive control that ages well. For classical piano, step outside Fatar toward Kawai or Yamaha wooden actions. Budget buyers get honest value from Casio’s Scaled Hammer boards, roughly $400 to $1,500.

One thing specs won’t tell you: how a board fits your hands. My genuine advice after years of this? Go test the keys in a shop before you commit. If that’s not possible, order two candidates and keep the one that feels right, then return the other. A keybed is the one part of an instrument you touch every second you play, so it’s worth the extra shipping label to get it right.

Do Fatar keybeds actually break?

Less than the horror stories suggest. In years of playing Fatar-equipped gear, the Komplete Kontrol, Virus, Argon 8, PC3A6, and Equinox, I’ve never had a keybed fail on me. When faults do appear they’re usually minor: a squeak from a worn felt strip, a sluggish contact, the odd cracked hammer weight on very old TP/10 boards. None of that is a crisis.

It’s also cheap to fix yourself. Replacement keys, contact-rubber strips, and felts run from under a euro to roughly 15 euros each at specialist vendors like synth-parts.com. A dead note is often just one contact strip. The real friction is availability, not price: Fatar sells B2B, so parts for older or discontinued models can be hard to track down, and a full professional replacement costs far more and varies a lot by region.

What’s next for Fatar?

The current direction is lighter and more expressive. The new TP/110 trims a hammer action to about 7 kg using a technopolymer chassis (Fatar), while the wooden TP/400 Wood flagship adds double escapement and Ivory Feel surfaces (Fatar). Both landed in the Studiologic SL mk2 line launched in January 2025, the SL73 and SL88 on the TP/110, the SL88GT on the TP/400 Wood.

The big open question is expression. Polyphonic aftertouch is having a moment: between 2024 and late 2025, Korg, Expressive E, and Supercritical all shipped new poly-AT or MPE instruments. Fatar plays here too, but only on its semi-weighted TP/8SK, seen in the Waldorf Iridium and UDO Super Gemini. Its hammer-action piano beds, including the TP/400 Wood and TP/110, remain monophonic aftertouch only. A full poly-AT hammer action would be a real milestone, and it isn’t shipping yet.

Frequently asked questions

What’s the difference between the Fatar TP/8S and TP/9S?

The TP/8S is a weighted synth action with longer black keys and a firmer, more deliberate feel, widely rated as the best semi-weighted board ever made. The TP/9S is lighter and faster, built for quick synth lines. Having played both extensively, I prefer the TP/8S for control and expression.

Which synths use the Fatar TP/9S?

The TP/9 family is the most common Fatar action by far, appearing in 105 of the 300-plus instruments catalogued on this page. You’ll find it in the Sequential Prophet 6 and OB-6, the Moog Matriarch and Grandmother, the Modal Argon 8, and Native Instruments Komplete Kontrol controllers.

When was Fatar founded?

Fatar was founded in 1956 in Recanati, Italy by Lino Ragni; the name stands for Fabbrica Tastiere Ragni, or Ragni Keyboard Factory. That gives the company roughly 70 years of keyboard-mechanism manufacturing, most of it spent supplying other brands rather than selling instruments under its own name.

Do Fatar keybeds have polyphonic aftertouch?

Only some semi-weighted models do, such as the TP/8SK in the Waldorf Iridium and the UDO Super Gemini. Fatar’s hammer-action piano keybeds, including the TP/400 Wood and the newer TP/110, offer monophonic aftertouch only. A full poly-aftertouch hammer action is not something Fatar currently ships.

How much does it cost to repair a Fatar keybed yourself?

Individual parts are cheap. Replacement keys, contact-rubber strips, and felts run from under a euro to about 15 euros each at specialist vendors like synth-parts.com. Most common faults, a dead contact or a squeaky felt, are DIY-fixable. A full professional replacement costs far more and varies by region.

The bottom line on Fatar keybeds

Fatar earned its position the boring way: by being predictable for 70 years. The TP/8S remains the connoisseur’s semi-weighted action, the TP/9S is the workhorse under most of the synths you’ll ever touch, and the piano-focused boards are steady rather than class-leading. Buy for the action, test with your own hands, and don’t fear the maintenance. If you’re investing in a serious synth or controller, you’ll almost certainly be playing a Fatar, so it pays to know exactly what’s under the keys.