Line level amp vs Upgrading power supply

I own and use nine or so $100 and under Class D amps and a couple A/B amps.

I’ve never upgraded the power supply on any of them….but on a couple of them (most notably the Aiyima A07max), they significantly benefitted from increasing the RCA line level input/pregain with an RCA line level booster.

Been using a $40 Douk Audio L1 with no noticeable added distortion/humming/etc.

Am I accomplishing the same goal with a line level amp vs purchasing more powerful power supply? If it’s different, please explain.

Thank you.
 
Last edited:
Some details on the Douk L1


IMG_9703.jpeg
IMG_9704.jpeg