I am pretty sure the following audio companies have agreements in place to implement MQA into their current or upcoming hardware.
Audioquest (Dragonfly)
Aurender (A10)
Auralic (maybe???)
Bel Canto
Bluesound (Node, Vault series and Soundbar)
NAD (M12, M50, M32, C 390DD, M502...)
Brinkmann
CanEVER
Cocktail Audio (X35)
dCS
Esoteric
IAG
Krell (Vanguard)
Mark Levinson ( No519)
LG (LG.V30 smartphone)
Lumin
Meridian (many products)
MOON by Simaudio
MSB
Mytek
Onkyo
Pioneer (XDP-100R)
PS Audio ( PS Audio DirectStream)
Pro-Ject
Sony (NW ZX300 and NW-A40)
Teac
Technics ( SU-G30)
Wapax
Audioquest (Dragonfly)
Aurender (A10)
Auralic (maybe???)
Bel Canto
Bluesound (Node, Vault series and Soundbar)
NAD (M12, M50, M32, C 390DD, M502...)
Brinkmann
CanEVER
Cocktail Audio (X35)
dCS
Esoteric
IAG
Krell (Vanguard)
Mark Levinson ( No519)
LG (LG.V30 smartphone)
Lumin
Meridian (many products)
MOON by Simaudio
MSB
Mytek
Onkyo
Pioneer (XDP-100R)
PS Audio ( PS Audio DirectStream)
Pro-Ject
Sony (NW ZX300 and NW-A40)
Teac
Technics ( SU-G30)
Wapax