| Feature | Passive |
Active |
| Isolation Range | >5Hz |
>.7Hz |
| Low Frequency Resonance | 2 -3 Hz |
None |
| Amplification at Resonance | 4-9 times |
N.A. |
| Load Sensitive | Yes |
No |
| High Center of Gravity decreases efficiency | Yes |
No |
| Stiffness | soft |
500 x Stiffer than Passive |
| Isolation in all six degrees of freedom | No |
Yes |
| Constant Compressed Air Req'd | Usually |
No |
| AC Power | none |
110-240 VAC |
| Settling time | 1-5 Sec |
10-20 msec |
| Auto Leveling | Yes |
Yes |