In 66% of cases "amplify by" is used
His own acute cultural awareness was amplified by what, or rather, who, came before him.
It started with Carter, promoted by Clinton, and amplified by Obama five fold over what you claim Bush did wrong.
During each round trip between the mirrors, the light waves are amplified by the active medium and reduced by internal losses and laser output.
But thanks to the jet-engine decibel level of right-wing rage, a cacophony willingly amplified by the media, that accomplishment was drown out.
Positive feedback works in the opposite direction, at the edge of instability: the signal is amplified by itself, weakening the relationship between input and output.
In 9% of cases "amplify in" is used
Both those themes -- an ethos of public service and ethnic diversity -- would be amplified in the ceremony and, more importantly, in the Games themselves.
In 3% of cases "amplify out" is used
But in the world that extremists inhabit, mere similarity is insufficient - it has to be much closer than that because small ideological differences are amplified out of proportion.
In 3% of cases "amplify through" is used
It is very absolve that the Mac OS X Lion shall be amplified through the Mac App Store, however, whether Apple association will release the annex brief to version 10.
In 3% of cases "amplify with" is used
This can be further amplified with HTML5 as it provides even more delineation of the content and adjusts based on device type and their implied intent.
In 3% of cases "amplify within" is used
Fears about the future of development education in schools are amplified within a context of global and national economic crisis.