Looked at the Buster fix, So my take on it was to get a Autoleads PC2-76-4 add the blue white cable for amp power and away you go, this is only a temporary fix as the output is now far to great so I am ordering a Autoleads PC9-440 that should rectify the problem.
However on further Investigation it would seem the Bose amps suffer from Earth degradation issues as well so I will be improving that as well.
Ok so Autoleads PC9-440 fitted, so far so good, however had to change the placement of the box as it was interfering with the Bluetooth on the head unit, wierd, lol. Easy to fit no messing only the blue white wire to add connectors to job done sounds great and no cracking or popping from the speakers when you Brake. :-)