Getting most out of a dual chiped TPA3116 class d amp

The amp i have do sound really good after i have adjusted the treble and bass (not neutral at 12 o’clock)

I don’t notice any unusually sibilance in the highs and power pr channel is as high or higher than any entry level surround recievers,amps in 8 ohm vs my amp in 4 ohm, no pop noise when i turn on/off the amp, the sound is on instantly, no sparks when conneting the power cord, no static noise adjusting the volume, noise, distortion is also surprisingly low

I just want to improve the power supply for up to 100 euros for a 24 voly 6-7 a linear power supply

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