buzzing noise on bridge pickup on Ibanez GSR 200 bass ( four knobs version )

[crgl]

Hi:

I have an Ibanez GSR 200 bass, the one with Phat II, and four knobs.
I noticed from the first time a buzzing noise when using the bridge pickup.
I wonder if this is normal being single coil pickups. It is strange that the neck pickup doesn't have that noise.

 

[banddomain]

You might want to take it apart and check the wiring to make sure it is properly grounded.