
Thin Lizzy's Scott Gorham has revealed how, during the time they recorded the band's commercial breakthrough album Jailbreak in 1976, their amps didn't have a master volume knob. Therefore, Gorham and fellow Thin Lizzy guitarist Brian Robertson didn't even realize how loud they actually played, to the detriment of their amp mics as well as their hearing.
“They were both the Marshall 100s. They didn't have the master volume at that point. And the microphones really couldn't take the heavy volumes, vibrating through the screens and all that,” explains Gorham in an interview with Guitarist.