Hello, I have a line 6 lowdown 110. There's a distortion at the speaker output. It happens in all the presets and is more noticeable at low and mid volume levels. If I turn down the bass frequencies, there's almost no distortion but it comes when the low frequencies are present. In the DI and the Headphones out the sound is ok, no problems. As I'm in a country with 220V AC I'm using an AC converter 220/110V, 1000W. I've tried with others converters, I've made a reset (holding down "clean" for 5-8 seconds when I turn on the amp) but the problem still remains.

Please somebody can help me? Thanks.