Sansui G6000, Blown fuse while Biasing

Hello here is one more question to be answered.

is it my ears or i think that after old TO3 to new transistors, the bass is no more sound powerful? or there is some settings in the equalizer which has been disturbed by the tech.

hurry up guys let's see who is first to answer this.
 
Different transistors will not (can not) change the bass response. Different settings are a possibility or equally it is your expectation that has changed (its a well known effect) where you think you hear differences that in reality are not there.

One obvious thing to check is that the speakers are phased correctly.