TOON X Amplifier with DSP Function Installed temporarily, auditioned, and removed on the same day. The sound quality changed just by plugging it in. All contents are included. The Velcro for installation is attached to the main unit. ■ For Toyota genuine display audio equipped vehicles High-performance DSP-equipped amplifier realistically reproduces sound. You can enjoy a sense of realism as if you were listening to a live performance. To fully enjoy the TOON X series, you can download sound data that has been finely tuned in actual vehicles. Sound files are available for vehicles other than those specifically designed for certain models. By installing the sound files, you can enjoy the optimal sound for your car.