I started the audio hobby during my teens in the wild world of DIY car audio installations

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Thanks, Focal-JMLab, for getting me hooked on the audiophile world in the late 90s.
Current listening and work system:
1 x Fosi ZD3 DAC
2 x Fosi V3 Mono, 48V 10A, powering a 2 x DIY'ed Klipsch RB-51 mk2s
1 x Fosi Audio ZA3, 48V 10A, in mono-mode powering 1 x 12in DIY'ed Klipsch Sub 12
1 x dbx 2231 31-band EQ for the tops
1 x dbx 231s 31-band EQ for the sub
DSP: Sonarworks SoundID Reference (cross-checked with REW)
Result at listening position:
> 25 Hz - 30 Hz +/- 4.5 dB
> 30 Hz - 60 Hz +/- 3 dB
> 60 Hz - 300 Hz +/- 1 dB
> 300 Hz absolutely ruler flat