Setting Amplifier Gain or Input Sensitivity
JL Audio Trainer, Rob Haynes, walks you through this simple 9-step method for setting amplifier gain. It will require test tone(s), a digital multimeter and a screwdriver. The complete procedure with target input voltages for JL Audio amplifiers , along with all kinds of helpful articles, can be found here: https://jlaudio.zendesk.com/hc/en-us/articles/204374120-Amplifier-Level-Setting-Guide