For me its headphones unless I like what is playing in the shop (we have speakers in FAI connected to the shop speakers with our own volume control. I like hard rock/metal (Disturbed, Korn, Volbeat, Slipknot, ect...)
The vibrations rattle everything loose cause that's how I work, fast and loose... and accurate. And I'm listening to Disturbed today, because I am disturbed. I work in FAI... I have to be disturbed.
now this is some metal i can get behind. I've seen all of those bands live (more than once) except Fit for a king. And they're from east texas (couple hours east of me)
"I am machine I never sleep I keep my eyes wide open. I am machine no part of me wishes I could just feel so d***.
I am machine I never sleep until I fix what's broken. I am machine no part of me wishes I could just feel so d***."
Three Days Grace
Pretty much You tube in my ear buds. Nothing but metal / hard rock..... Black Label Society, Alice in Chains, Iron Maiden, Black Sabbath lately, A little Slayer mixed in....