hello everyone, I start by saying that I'm not an electronics expert but I really like it and I would like to give it a try to try and find a solution to the problem, practically the GK and a preamp that I connect to the marshall 9200 power amp and you hear a strong hiss that increases as the volume increases, both clean channel A and distorted channel B, both with guitar connected and not connected, I am attaching a video for now I have limited myself to trying to replace the components of the power supply stage because I thought they were the cause of the problem, the replaced components are circled in red, but the problem evidently persists not in the power supply stage. Thanks
Attachments
connecting or disconnecting the guitar cable from the GK preamplifier does not change anything, the problem is in the Gallien Krueger when I use the JMP1 which is a marshall preamplifier it has no hiss or buzzing problem.
I can't help any more as those rigs are unknown for me. Perhaps one more skilled in musical instruments can do.
Agree with Osvaldo that is Hum/Buzz, not Hiss.
You have half a Guitar Shop in that rack setup, ALL noises add up.
I much suspect grounding around your GK preamp, but more important: we NEED a clear detailed drawing of your setup.
For example, I do NOT know how is your JMP1 preamp connected to the 9200 Power Amp, even less how the GK is simultaneously connected to it, those are 2 separate independent preamps and usual would be connecting either one or the other to the power amp, through some kind of switching/patching, yet here you simply rise one or the other volume.
Again: we need the full map, on a nice and clean sheet of white paper.
You have half a Guitar Shop in that rack setup, ALL noises add up.
I much suspect grounding around your GK preamp, but more important: we NEED a clear detailed drawing of your setup.
For example, I do NOT know how is your JMP1 preamp connected to the 9200 Power Amp, even less how the GK is simultaneously connected to it, those are 2 separate independent preamps and usual would be connecting either one or the other to the power amp, through some kind of switching/patching, yet here you simply rise one or the other volume.
Again: we need the full map, on a nice and clean sheet of white paper.
unfortunately nothing changes that is connected to the patch mate or directly to the 9200 nothing changes they are tests that I have already done, I also tried to connect it to the tsl602 combo it makes the same noise.