KORG DSN-12 Korg LP-380 is equipped with the RH3 keyboard model which you can adjust on three hardness levels, from light, normal to heavy. It’s hard to write any arranger keyboard reviews without discussing the Korg Pa4X, still an absolute powerhouse in 2020… DYNAMIC PHRASE SYNTHESIZER. The cheapest offer starts at Tk 1,500. KORG Gadget for Nintendo Switch. KORG Kaossilator for Android. RH3 is Korgs flagship keyboard… The keyboard is progressive, i.e. The best Korg arranger keyboard. Korg Pa4X. MUSIC PRODUCTION STUDIO. Check it out! Explore 5 listings for New korg arranger keyboard at best prices. Here are the best arranger keyboards 2020: Korg Pa4X; Korg Pa1000; Yamaha PSR-A3000; Yamaha Genos; Korg Pa300; Roland E-A7; Casio CT-X5000; 1. lighter at the top and heavier at the bottom.