I don't agree. True at high volume levels the Casio may distort just a tad, but at normal playing levels I think the Casio blows the lid off the speaker system of the DGX series. Way better quality woofers with MUCH and I mean MUCH more bass. Plus the tweeters are considerably better as well. I've played the entire DGX line and I feel the speakers are quite weak.

Squeak
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GEAR: Yamaha MOXF-6, Casio MZX-500, Roland Juno-Di, M-Audio Venom, Roland RS-70, Yamaha PSR S700, M-Audio Axiom Pro-61 (Midi Controller). SOFTWARE: Mixcraft-7, PowerTracks Pro Audio 2013, Beat Thang Virtual, Dimension Le.