Desktop power Amp

I have the project, clear and well defined - for now on paper, but I have all the ingredients or almost, the video card is missing, but it could arrive in the next few days. for now without photos, these are the components:

¹ Soundstream Reference 300 75W*2
² stabilized power supply 14Volt 50amp
³ Big Cap - large stabilizing capacitor and current accumulator

PC
|
Sound Card
|
(this Amp)
|
Passive speaker (LS 3/5a hybrid - finished)


----- software - microphone - - - & more


These will be the amplifying part of the Desktop Audio system.
 
Many of you are thinking - why use a car stereo amp in this way with a stabilized power supply of a certain type that is also quite expensive?

and you have the right.
This thing in fact is not even in my beliefs, but it is an emotional question, perhaps I have to get over it and move on to plan B.

Plan B:
¹ LINN hi-fi old school (little money)
² Quad old school (no price yet)
³ hybrid tube (< 100eu) 30W - card + external power supply 150W 18V - all assembled, only to make the connections, RCA, speaker plugs.
 
the only 'philosophical' oppositition to this idea (which has already been covered in numerous threads) is that 'car audio' is made for 14-16 V DC applications and 'home audio' depends from the mains, from 100 to 240 V AC. Yes, there is something 'after' that provides for the correct supply of voltages for all the stages.