Vibration Research Corporation VR4600 600 lb-f Shaker System. Includes Shaker, Direct coupled linear Power Amplifier, Isolation Mounts, Interconnect Cables and Hoses. Sine Rating: 606 lb-f (2700 N). Random Rating: 449 lb-f (2000 N). Shock Rating: 1348 lb-f (6000 N). Frequency Range: 2 to related products