The Variac: Variable Voltage Transformers & Tube Amps - Explained
59:02
Amplifiers and Variacs!
14:34
This Could SAVE Your Tube Amp (and Your Tone)
19:17
Why I Bought A Brown Box To Protect My Vintage Tube Amps - Ask Zac 127
10:55
Eddie Van Halen’s Brown Sound | Does a Variac Actually Change an Amp's Tone?
21:35
Variac Isolation Transformer. Are Variacs Isolated?
51:23
That Pedal Show – How To Mic Your Guitar Amp: Mic Types, Positions & All That Stuff
37:37
Guitar Amp Controls: Tone Stacks, Bright Switches, & More - Explained
28:22