The Alpine KTX-CSP1 setup microphone is designed to plug directly into your Alpine PXE-C80-88 DSP amplifier/processor (sold separately), letting you accurately fine-tune the DSP to match your vehicle’s interior acoustics. The high-quality microphone features a built-in 3.5mm TRRS connector, providing a balanced output signal. A durable braided 10′ extension cable is included, allowing you to easily move the microphone throughout the vehicle interior during the AutoEQ setup.