The PSR-SX700 and PSR-SX900 were launched in August 2019, with the PSR-SX600 arriving in late 2020.

The two following numbers show the succession of instruments in that particular class.

Yamaha has decided not to add aftertouch to any of the keyboards in the S and SX range.

This would add to the cost, and presumably make manufacture of any model with aftertouch more difficult, as theyre simply using the same basic physical layout and structure for each keyboard.

There are plenty of additional controllers and switches available for manipulating sounds.

They are still available from third-party retailers there may still be new stock available or alternatively on the second-hand market.

Though they have fewer features, theyre still laden with enough to keep many musicians happy, and can be expanded if desired.

It is very slightly smaller and weighs about 7lbs less than the other two.

The SX600 only has 20MB of internal memory, while the SX700 has 1GB and the SX900, 4GB.

All can use some form of external USB storage to expand this.

The SX700 and SX900 both have a pair of standard MIDI ports as well as USB functionality.

The touch response can be set to five different modes: Hard1, Hard2, Medium, Soft1, Soft2.

What youre getting in the new model is more sounds, styles and effects.

Of course, sounds and accompaniments make or break an arranger workstation, so yup could argue its worth getting the latest model to benefit from those.

Style Keyboard Yamaha Psr 550