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The Yamaha Montage M range is one of those keyboard lines where the decision looks simple at first.
M6 has 61 keys.
M7 has 76 keys.
M8x has 88 weighted keys.
Job done, right?
Not quite.
Because with the Montage M series, you’re not really choosing between three different sound engines. You’re choosing the version that best fits the way you actually play.
All three models share the same core Montage M sound world, including Yamaha’s AWM2, FM-X and AN-X engines. The big difference is the keyboard itself, the size, the weight, and in the case of the M8x, the polyphonic aftertouch keybed. Yamaha lists the M6 at 15.3kg, the M7 at 17.6kg and the M8x at 28.1kg, so this is not just a “how many notes do you want?” decision.
So here’s my honest take.

The Montage M6 is the most compact version in the range, with 61 keys.
This is probably the one to look at if you’re mainly a synth player, producer, programmer, or someone who already has another piano or weighted keyboard in the room.
It gives you the full Montage M experience in the smallest body. That means the same flagship sound engine, the same style of workflow, the same serious Yamaha performance power, but without committing to a much larger keyboard.
Where I think the M6 makes sense:
You’re using it in a studio where space matters.
You play a lot of synth, lead, pad, brass, organ and layered sounds.
You want the Montage M engine but don’t need a huge key range.
You’re likely to use it alongside another keyboard.
You want something easier to move than the M7 or M8x.
The only real compromise is obvious: 61 keys can feel tight if you’re playing big piano parts, left-hand bass, orchestral splits, or anything where you want lots of room across the keyboard.
So, if your playing is mostly synth-based, the M6 makes loads of sense. But if you regularly find yourself running out of notes, I’d skip straight to the M7.
This is the one I think a lot of people should seriously consider.
The Montage M7 gives you 76 keys, which is a really nice middle ground. You get more playing room than the M6, but without going all the way to the size and weight of the M8x.
For many live players, this is the sweet spot.
You’ve got enough range for proper splits, layers, piano parts, strings, brass, synths, pads and performance setups. But you’re not lugging around an 88-note weighted monster every time you leave the house.
Where the M7 makes sense:
You play live.
You want one serious main keyboard.
You use splits and layers.
You want more space than 61 keys.
You don’t specifically need weighted piano action.
You want the flagship Montage M engine, but in a more manageable format.

The M6 and M7 use Yamaha’s FSX synth-action keyboard with channel aftertouch, while the M8x is the model with the weighted GEX action and polyphonic aftertouch.
So if you’re a pianist first, the M7 may not give you the feel you want. But if you’re a keyboard player rather than a pure pianist, the M7 could easily be the cleverest choice in the range.
Honestly, for a lot of players, this is the one I’d point at first.
The Montage M8x is the big boy.
88 keys. Weighted action. Polyphonic aftertouch. Much heavier. Much more serious as a piano-style instrument.
This is the model Yamaha themselves position towards pianists wanting an 88-key weighted action and synth players wanting expressive polyphonic aftertouch.
And that’s the key thing here: the M8x is not just “the bigger one”. It’s the one with the most different playing experience.
If you’re coming from a Clavinova, stage piano, CP, Nord Piano, Roland RD, or any proper weighted 88-note instrument, the M8x will feel much more natural than the M6 or M7.
Where the M8x makes sense:
You are a pianist first.
You want the most expressive version of Montage M.
You compose with piano, strings, pads and orchestral layers.
You want 88 notes for proper two-handed playing.
You care about polyphonic aftertouch.
You’re less worried about moving it regularly.
But let’s be honest: 28.1kg is a proper lump.
If it’s going in a studio, church, theatre, home setup, or staying in one place most of the time, lovely. If you’re carrying it up staircases every weekend, have a little word with yourself first.
Here’s the simple version.
Buy the Montage M6 if you want the full Montage M sound engine in the most compact format, and you’re mainly playing synth, lead, pad, organ, brass, production parts or using it with another keyboard.
Buy the Montage M7 if you want the best all-rounder. It gives you more room than the M6, it’s much easier to manage than the M8x, and for many live keyboard players it’s probably the most sensible choice.
Buy the Montage M8x if you’re a pianist, composer, studio player, or you want the most expressive keybed in the range. It’s the one to buy if the feel of the keyboard really matters to you.
For most gigging keyboard players: Montage M7.
For pianists and serious composers: Montage M8x.
For synth players, producers, or people with limited space: Montage M6.
The nice thing is that there isn’t really a “bad” one here. It’s just very easy to buy the wrong size if you only look at the spec sheet.
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