AP 560P&P I/OPrima extension cable with Plug & amp; Play connections allows total freedom in positioning the AP bit amplifiers. Two extension typologies are available: input only, to only send the audio signal coming from the head unit to the AP bit amplifiers, or input output, transmit also the AP bit amplifiers output signal to the factory audio system. To do so, the AP Extension Cables IN OUT needs to be installed together with the AP Speakers Output Cables