Cross-reference this version with online synthesizer registries; an early serial number paired with a late-stage factory ROM usually indicates that the unit has been modified, repaired, or upgraded. Value Impact
Korg offered an "EX" expansion kit that upgraded the internal PCM memory. Some late-model M1s came from the factory as an M1EX, noted by a sticker near the serial number. If a serial number indicates a standard M1 but it has an EX badge, it means a previous owner upgraded it manually. 6. What to Do If the Serial Number Is Missing
The serial number can be an unexpected hero when you need to restore your Korg M1 to its original factory state. Korg M1 Serial Number
For software products like the M1 Le , you can log into the Korg User Net website and see your registered product code displayed there. This code is often linked to your hardware unit’s serial number.
Since the sticker is on the back near the I/O ports, "blind plugging" cables often scratches the text. If a serial number indicates a standard M1
If you are looking for a "piece" of its history, the M1 is most famous for specific presets that defined late 80s and early 90s music: M1 Piano (Preset 01: Piano 16') : The definitive house music piano used in Madonna's " Vogue " and Black Box's "Ride on Time" [14, 23].
Standard production units began around serial number 010001 or 100001 , depending on the regional distribution factory. For software products like the M1 Le ,
Does the number point to an early 1988 build or a later 1991 build?
Serial numbers also help distinguish between the standard M1 and the "EX" (Expanded) version. Many users later upgraded their standard M1s with the EX memory kit, which doubled the internal PCM waveform data. A serial number check against Korg’s manufacturing logs can confirm whether a unit was born as an EX or upgraded later. The Collector’s Value
If you are buying or selling a Korg M1, the serial number can swing the price by $100-$300. Here is why.
