Headphones:

Beyerdinamic DT880 (250 Ohm)
B&O H6 2nd Gen
Bowers and Wilkings P7 Wireless
Sennheiser HD660S (since April 2020)
Hifiman Sundara (since April 2020)
Audioquest Nighthawk (January 2021)

Also had: DT990 Pro, Philips Fidelio X2 (Gibson)

DAC:

SMSL SD-793 II DAC
Apogee Groove (since April 2020)

Also had: Fiio E11

Amp:

RNHP for testing (January 2021)