Hiya, I've got a Hartke LH1000 with HX410 and HX115 rig. I've had this setup for the last 3-4 years and I am super happy with it. Recently however I've noticed small issue which can be quite serious in the long run. Whenever I touch any metal component on my bass (bridge, strings, control knobs) the speaker pops. First I suspected bad grounding on my bass, but it happens to all of them and I have rewired on myself just to make sure there's a good solid ground. Then I discovered that amp on its own also produces POPS to the speaker when I touch the metal rack that is mounted to. taken out of the rack it also pops every time I touch input or any metal unpainted part. I have tried brand new mains lead to make sure it is ok and eliminated everything else in the chain leaving the LH1000 alone...and yes, it still pops. It sounds like static pops and overtime when it gathers it will pop quite loudly. When connected with a bass it will generate quite annoying hiss/buzzing noise, that goes away as soon as I touch metal part, like bridge or the strings, which always give me that unhealthy 'POP' noise. I'm guessing that one of the internal components may given up over the time, but I would really appreciate your opinion. Many thanks in advance. Mackie, Cambridge, UK.