The problem with DJX was you couldn't add new styles.

Other "consumer" synths with speakers...Yamaha's DX27S, B200, and Roland's HS-80/60/10.

These instruments are rare because they just didn't sell well.
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Yamaha Tyros4, Yamaha MS-60S Powered Monitors(2), Yamaha CS-01, Yamaha TQ-5, Yamaha PSR-S775.