When a passive Pick-Up is installed in an Acoustic Guitar, the sound from the Pick-Up is often "thin" and "tinny". This is because the frequency response of the Pick-Up is much more sensitive to the High Frequencies than the Low Frequencies.
Because of this, you hear too much of the High Harmonics and you lose the Low Harmonics. Often the amplifier or mixer you connect to doesn't have enough EQ or Tone Control range to regain the natural sound of the Guitar.
You need a instrument cable that has a built in Low Pass Filter which corrects this problem. The cable itself reduces the High Harmonics producing a more natural Guitar sound for the amplifier or mixer.
