Overview Reviews Product Description Key Return Spring for Ensoniq ASR-10 and many other Ensoniq and Emu keyboards. Product Videos Custom Field Product Reviews Write a Review Write a Review × Ensoniq Ensoniq, Korg, E-mu Proteus PK-6 Key Return Spring Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Email * Review Subject * Comments *