Reviews and Problems with Korg M50-73 Digital Keyboard Workstation
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Beware of signal issues
Backpack Blues, amazon.com
4 September 2011
Summary: At first this keyboard is awesome. But there is a known issue with some M50's in which the one of the channels eventually begins sending a weaker and dirtier signal. For me, my left channel ended up being about 40% weaker and full of static after about a week of use.