Korg M1 Serial Number -

The M1 EX was a factory upgrade or a DIY expansion board that doubled the internal preset memory (from 100 to 200 sounds) and added 18 new PCM waveforms. If your Korg M1 serial number is , it almost certainly does not have the EX board. If your serial number is above 350,000 , it likely shipped from the factory with the EX board already installed. You can verify this by turning on the M1 and looking for "EX" in the top right corner of the LCD screen.

: Registered users can find their product codes by logging into their account at KORG USER NET and selecting the M1 tab. Why Your Serial Number Matters Knowing your serial number is essential for: Korg M1 Serial Number