Vigier Guitars

Hi, I own a Vigier Passion IV. It´s an active bass and I want to use it in passive mode. I would like to install a switch o a push/pull or similar. Is it possible? If it is not possible, is there any version of the preamp with active/passive switch?
 
Thanks!

There is no other version so you would have to do some modifications to achieve what you want to do.

Hi Ben. Thanks for reply. I´ve asked about make this modification to the preamp and I´ve been told it is not possible. Can you help me? Do you know exactly what to do?
 
Thanks!

Sorry, I do not. Do you have a good local luthier / guitar store that could help?

I have contacted some people that maybe can help me. I´m waiting for an answer.
If you know someone that can help me, let me know.
 
Thanks for the reply.

It´s possible to change the preamp too. But i really love the sound of the bass. Any suggestion about that?
 
Thanks.