Advantages of negative feedback over positive feedback:
1. Higher fidelity i.e. more linear operation.
2. Highly stabilized gain.
3. Increased bandwidth i.e. improved frequency response.
4. Less amplitude distortion.
5. Reduced noise.
6. Less harmonics distortion.
7. Less phase distortion.
8. Input and output impedance can be modified as desired.
9. Less frequency distortion.