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jlyman

DT25: mode 4 hum

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I just picked up a used DT25.  LOVE IT!  I wanted one way back but it wasn't meant to be.  Anyway... modes 1, 2, and 3 are quiet.  Mode 4 is the is the high gain mode.  While sitting with no action from the guitar and regardless of where I have the volume on the amp, I notice a bit of hum coming from it.  Should it be quiet with no hum like the other modes?  I'm assuming this is working as designed though because of the high gain. 

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I also have a big difference in hum in mode 4 and the rest, disabling the compressor fixes it. Not really an option.

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I bought my DT25 second hand recently and had some hum as well. Ordered a new matched set of Electro Harmonix EL84s.... It's nice and quiet now!

 

Thanks

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I am not that sure it is just a matter of changing tubes. In my case the hum (and noise) was caused bij the HyperGravity Compressor. In the default profiles all the 3 different settings use Auto Gain. Obviously a high gain mode setting of the DT25 is more susceptible for noise that is amplified by the Auto Gain feauture. Using TonePrint I have created a setting with Auto Gain off and reduced the noise and hum.

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