Vibration Research Corporation VR5800 500 lb-f Shaker System. Includes Shaker (rated at 500 lb-f pk Sine, 350 lb-f rms Random, 1,000 lb-f pk Shock, 1.0 inch peak-to-peak displacement, armature weight 5.0 lbs, diameter 6.0, frequency range DC-4,500 Hz), Direct coupled linear Power to