Hello, this is my first post on this thread.
I just recently got a Chinese made RSD MetroExpress four string P/J hybrid made in 2021.
I’ve been getting a lot of noise out of the bass. The treble knob when it’s cranked doesn’t help this, rolling off of it helps a little but you can still hear it. The noise is still present when I touch the strings, bridge or even the pickups.
It doesn’t sound like a single coil hum, but different. If my cellphone is within 2-3ft of the bass it makes even more noise. When I put the bass into passive mode the noise seems to completely go away… albeit since the volume of the basses output drops I haven’t played through my amp at the same volume as if it was in active mode.
I’m not sure if this is a pickups, preamp issue or maybe a shielding issue. I have little to no experience dealing with this. I recently picked up a VTC from a buddy here on TB and I don’t want to drop it in, if it’s not the preamp and one of the other two potential issues.
One buddy out of state suggested I use a multimeter to check the pickups. I don’t own one or even know how to check that, so at this time that is off of the table.
Any assistant with this would be greatly appreciated, thanks for everyone’s time in advance.