Metra Digital signal processor and T-harness — add an aftermarket amplifier to the factory system in select 2016-17 GM vehicles

Let's face it, your GM vehicle's fancy feature-filled radio doesn't sound that good, but you can't replace it because of all the good things it does. Axxess, a master producer of vehicle interface devices, has come out with this fully-tunable AXDSPX-GL9 digital sound processor that plugs into your factory radio and gives you the ability to add aftermarket amplifiers, transforming your vehicle's interior into the sweet-sounding music listening room you want. You make all your sound adjustments via the Bluetooth connection on your Android or Apple device using Metra's AXDSP-X app. Adjustment features include a 31-band graphic EQ with high-pass, low-pass, and bandpass filter options on each channel. Time delay allows you to align the sound of all your speakers in order to create the perfect sound stage centered on the driver or prime listener. The AXDSPX-GL9 comes with a wired remote bass knob, so you can control the bass from the front, when one of the assignable output channels goes to a sub amp. Other conn...