Email 1: “Free tuning kit inside”
Direct link to tuning kit files: click here
Email 2: “🔊 [1/4] How to use your tuning kit”
Email 3: “🔊 [2/4] How to use the Amp Gain Tuning spreadsheet”
Also checkout our Amplifier Voltage Calculator
Email 4: “🔊 [3/4] How to use the tuning tracks”
Tuning Tracks (Test Tones) can also be found here