The Jensen DSP Amp app connects to compatible Jensen amplifiers via Bluetooth and controls most primary functions including: * EQ * X-OVER * RGB Light Customization * Volume * Gain Control * Frequency Adjustment * Remote Bass Control (XDA91RB only) Customize your sound by adjusting the integrated digital sound processor (DSP) in the amplifiers using the dedicated application on your smartphone. This app is compatible with the following Jensen models: XDA91RB / XDA92RB / XDA94RB / BOAU