Is there a set of jumpers on the back that allow you to seperate the preamp section from the amp section? If so, seperate the two and put shorting plugs or Cardas caps on the inputs to the amp section. If you don't hear hiss, it's in the preamp stage, if you do, it's in the amp stage.
That's why it's really helpful for those seeking this kind of advice not to keep it a secret and actually give the name of the marque and model number.
That's why it's really helpful for those seeking this kind of advice not to keep it a secret and actually give the name of the marque and model number.