1. Jan 17, 2018 #1
   

   Navnetso_Cal

   Dec 30, 2017

   I have a GK Blackline 210 combo...It’s older... It will hum as you turn the volume up on any bass but the hum diminishes when the bass volume is at full.
   Can anyone recommend a repair person in the LA / San Fernando Valley?

    
5. Jan 17, 2018 #2
   

   Downunderwonder

   Aug 26, 2009

   New Zealand

   Good amp techs!

    
10. 

    Primary TB Assistant

    Here are some related products that TB members are talking about. Clicking on a product will take you to TB’s partner, Primary, where you can find links to TB discussions about these products.
    
    

     

    Mar 3, 2021

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