SolutionHubTech adjusts amplifier bias in Marshall tube/solid-state speakers in Ghaziabad. We optimize current flow for minimal distortion and tube longevity. Critical for vintage models or after tube replacements. Our calibration uses oscilloscopes and dummy loads for precision. Restore warm, dynamic sound with professional bias tuning. Service covers JCM900, DSL, and Acton series in... https://solutionhubtech.com/marshall-repair-in-delhi.html