This unit has three 6.5 V pre-outs if you want to add an amplifier, and the higher voltage pre-outs give a better amp signal, resulting in better dynamic, highs and bass. There are some interesting features such as the Auto EQ, which automatically fine-tunes the whole range of the music's frequency bandwidth to your car's shape by using the included microphone. The Auto Time Alignment uses the same mic to estimate sound delay from each speaker and compensate for it so that all of the sound reaches your ears at the same time. The BMX (Bit Media e-Xpander) Digital Enhancement is unique because it enhances MP3 audio that is burned to an audio cd through either enhancing the depth and width of the sound field, or improving the sense of presence. It is also compatible with XM and Sirius Satellite Radio.
