Chef
In Memoriam
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Chef
In Memoriam
Drag...
But, you can change your position relative to the amp and it quits when you get it just right?
But, you can change your position relative to the amp and it quits when you get it just right?
Chef
In Memoriam
Across the room is a bit better, but still noticeable. Must be bass related, when nothing is plugged in the amp is dead quiet. Shielding?
Is this a 400RB version with a detachable power cord? You might try a different one as it would not be the first time I have heard or seen a ground fail on one.
It is, but the hum happens on my MB200 as well, which uses a different power cord.
That would leave us with the bass then, loss of shielding or ground. Something new in the building or building wiring (use an outlet tester).
Nothing new in the building or wiring, and I tried that identical bass on another rig tonight at practice. Different house entirely though, but same bass and the MB200. It's just odd. When I began playing, the rig was dead quiet. After adjusting that master knob, it hummed. Even when I adjusted it back, hum. Strange. But at the next location, back to normal. So maybe it's just the house? Bass seems fine in other environments... Won't be able to test again for a week, but it was just odd. That's currently my rig stored at my parents' place, so until I move, it won't get much play. Hopefully it's not an issue when I get my new place!
Sounds like electromagnetic pickup on the bass, especially if it reduces as you move (or rotate) your position. Lighting dimmers are a prime candidate.
The fact that the noise is sudden-onset when you touch the amp, suggests that it might be a ground loop.
A loose/intermittent ground connection on the bass, perhaps? I would start by gently wiggling the ground wires on the output jack and pots. I would also check to see if the noise gets louder/softer with your hand off/on the strings, in order to determine if the bridge ground wire is still making contact.
I would also try a couple more guitar cords. I've lost count of the times I've seen somebody swap out a bad cable with another one, creating the false impression that the cable can't be the problem...
What about pedals? A lot of pedalboard junkies take their board for granted, not realizing that extra gain from clean boost pedals, bad jumpers, etc., can have a profound effect on noise pickup.
A loose/intermittent ground connection on the bass, perhaps? I would start by gently wiggling the ground wires on the output jack and pots. I would also check to see if the noise gets louder/softer with your hand off/on the strings, in order to determine if the bridge ground wire is still making contact.
I would also try a couple more guitar cords. I've lost count of the times I've seen somebody swap out a bad cable with another one, creating the false impression that the cable can't be the problem...
What about pedals? A lot of pedalboard junkies take their board for granted, not realizing that extra gain from clean boost pedals, bad jumpers, etc., can have a profound effect on noise pickup.
No lighting dimmers in the entire house! Can't be that...
I've thought of the bass being the issue, but as stated before, I played the exact same bass later that day on a different rig and it was perfect. So I don't think it's the bass. I did think of trying more cables, but didn't have any there, so that was my quick assessment. As far as pedals go, removing my pedalboard was one of the first things I did. No change. Thanks for the help guys! It'll be a bit before I can test again, but I'll try and get it down. I'm hoping it's a ground loop somewhere, since when I move, that amp etc. is coming with me. It's currently in temporary storage at my parents' place.
I've thought of the bass being the issue, but as stated before, I played the exact same bass later that day on a different rig and it was perfect. So I don't think it's the bass. I did think of trying more cables, but didn't have any there, so that was my quick assessment. As far as pedals go, removing my pedalboard was one of the first things I did. No change. Thanks for the help guys! It'll be a bit before I can test again, but I'll try and get it down. I'm hoping it's a ground loop somewhere, since when I move, that amp etc. is coming with me. It's currently in temporary storage at my parents' place.
Scratch that! I'll be able to test today, so hopefully I'll get it figured out later. I'm bringing my bag of cables, some of which are brand new, so hopefully that will at least eliminate that possibility.
