050 Allen wrench to make adjustments to the pickup.) ES2 guitars use a piezo pickup with three contact points behind the saddle. Expression System 2 - equipped guitars: (You'll need a.This will help hold the saddle in place, maintaining the string balance. When changing strings remove and replace them one at a time. Start with the middle (D an G) strings and work your way out. You can try to loosen all the strings and tighten or retune each string a few turns at a time, gradually putting even pressure on the pickup as you tune to pitch. An uneven fit means uneven pressure and uneven output. A precision fit is required between the saddle, pickup and bridge. EST and ESN equipped guitars: These guitars use an under saddle piezo pickup.Expression System 1 - equipped guitars: Make sure the strings are fresh and the recommended gauge.Here are a few things you can try at home. Electric guitars have exposed pickups that are easily adjustable. If the problem persists, acoustic guitars and T5s will require service by the Taylor factory or other qualified repair professionals. Some amps accentuate certain frequencies which can make a particular string seem louder or quieter than the others. If there seems to be a serious balance issue, test the guitar through multiple amps or systems. Expect a slight variance as you would hear when the guitar is played acoustically. When your guitar is plugged in, each string should be relatively the same volume.