The Bose speaker/amps are not compatible with aftermarket head units. The Bose system is a 4 ohm low power input system. Most head units are 8 ohm high output. If you installed an 8 ohm high output head, then you have probably fried the Bose speaker components. The best best is to delete the amps and replace the speakers with ones matched for your existing head. Do some searching on here as there is a lot of information covering this. Hope this helps.