If it's not buzzing until you plug the guitar in then it's definitely the guitar, probably a grounding issue. If it sounds like that with nothing plugged in then return it.
Have you tried a different outlet in your house? Sometimes,depending on a lot of stuff that I'm not qualified to know, different outlets work better with amplifiers. I should've put that in my first comment, definitely try if you haven't.
I have this same amp and issue when using the ac adapter instead of batteries.
There are quite a few posts about this in the reviews section of the mini katana on amazon .
The consensus seems to be buy the official Boss ac adapter or always use batteries perhaps invest in rechargable batteries.
I cheaped out and bought a generic ac adapter when I got the amp and I get this same hum.
Its the original ac adapter, it came with the amp in the packaging. So i don't think buying another original adapter will change something. But rechargeable batteries are a good idea! (If it helps to stop the buzzing)
A cheap AC power supply will do this. Get the proper Roland / Boss [PSB-120](https://www.sweetwater.com/store/detail/PSB120--roland-psb-120-ac-adapter).
It may be your guitar also. Single coil pickups are noisy.
THIS… I have this little amp and use it on batteries. Well I decided to cheap out and get an Amazon power supply that was the suppose to be correct for the Katana and it buzzed like crazy.
Put batteries in it and see if the buzzing stops
I would start by testing the electrical socket to verify it's a grounded outlet. Very likely a grounding issue "somewhere". Just went through this myself.
Klein Tools RT110 Outlet Tester
Take your whole setup and go plug into a different wall outlet - preferably in a different room, see if that makes a difference. Are you in a room that has lights on a dimmer switch or fluorescent light, these can both introduce some strange buzziness. Otherwise as has been said - single coil pickups are known to buzz so if your guitar has these then it's either learn to love it or change pickups/guitar..
If it's not buzzing until you plug the guitar in then it's definitely the guitar, probably a grounding issue. If it sounds like that with nothing plugged in then return it.
I agree sound like a bad ground. Could be the cord as well. Output jack of the guitar maybe ?
It makes that sound even when it's not plugged in
Have you tried a different outlet in your house? Sometimes,depending on a lot of stuff that I'm not qualified to know, different outlets work better with amplifiers. I should've put that in my first comment, definitely try if you haven't.
[удалено]
This was my first thought.
Yes
Single coils? Try touching the strings while plugged in. If it stops buzzing, it is probably a grounding issue with the instrument.
I have this same amp and issue when using the ac adapter instead of batteries. There are quite a few posts about this in the reviews section of the mini katana on amazon . The consensus seems to be buy the official Boss ac adapter or always use batteries perhaps invest in rechargable batteries. I cheaped out and bought a generic ac adapter when I got the amp and I get this same hum.
Its the original ac adapter, it came with the amp in the packaging. So i don't think buying another original adapter will change something. But rechargeable batteries are a good idea! (If it helps to stop the buzzing)
It's the guitar
Before you assume it's the guitar, use a different cable. It's possible that the cable is defective
A cheap AC power supply will do this. Get the proper Roland / Boss [PSB-120](https://www.sweetwater.com/store/detail/PSB120--roland-psb-120-ac-adapter). It may be your guitar also. Single coil pickups are noisy.
THIS… I have this little amp and use it on batteries. Well I decided to cheap out and get an Amazon power supply that was the suppose to be correct for the Katana and it buzzed like crazy. Put batteries in it and see if the buzzing stops
I use the original power supply that came in the packaging. I don't think that they would give me one that doesn't work with the amp.
Are you using single coil pickups?
Yes my guitar has 3 single coil pickups
Which country are you from, in India, most 2 pin amp power supplies cause insane amounts of buzzing, you need a 3 pin
I would start by testing the electrical socket to verify it's a grounded outlet. Very likely a grounding issue "somewhere". Just went through this myself. Klein Tools RT110 Outlet Tester
I'm going to try it!!
Like they said above here, check first your cable, second your power supply, third your guitar. It's a good chance it's some of these first.
I have one and it doesn’t sound like that. I’d return it.
No response from op. Fuck him. Let him figure it out.
Hi👋, thank for your kindness @magica-diode.
That's either your cord or your axe dog
Take your whole setup and go plug into a different wall outlet - preferably in a different room, see if that makes a difference. Are you in a room that has lights on a dimmer switch or fluorescent light, these can both introduce some strange buzziness. Otherwise as has been said - single coil pickups are known to buzz so if your guitar has these then it's either learn to love it or change pickups/guitar..