i conclude from this video where McGowan say "stay away from low cost pre-amp if you dont have the budget " that my low cost Douk tube +EQ pre-amp must be very good costing peanuts... ( McGowan is a seller and i imagine he could not recommend cheap Chinese pre-amp like Douk T8 pro )
Just my low cost class D amplification inside the Edifier speakers and my Nos dac SPS with no volume control cannot give me the control over S.Q. and soundstage i have now ...
Then i will say after McGowan stay away from bad pre-amp... All low cost one are not bad ... For sure i use it for my low cost system... For a high end system i will use high end pre-amp ( Probably a Berning tube pre-amp ) ...

