Agreed that you can tune the sub-bass with sources and cables to your liking. Everyone’s experience will be different but Cardas copper + 4.4mm off 1A gives me plenty of sub-bass. Also MW10 is extra sub-bass boosted if you can find one. Clean and lots of texture + qty too.
1A/1Z is an excellent pairing w/ the Andros. I've also tried the SP2000 and AR15 which I like immensely as well (lowest floor noise I've experienced for a DAP).
IMO, output impedance is equally responsible for the macro-dynamics as current swing when the output impedance is > 2 ohm. For less than 2 ohms OI, I'd say the current swing is slightly more of a factor to determine that bass slam, extension and definition/resolution (micro-dynamics) out of the Andromeda. What current swing provides aside from the macro-dynamics is micro-dynamics where overtones in the subbass region are much more fleshed out, weightier and less fuzzy or tinny sounding (The Apple Dongle with <1 ohm sounds tinny in the bass region despite the <1 ohm output impedance).
I would be wary of the Sony DAPs when it comes to hissing as the AK DAPs are normally less sensitive to noise out of the Andromeda. AK SR25 would be considered the "brightest" sounding DAP in the treble region out of the current AK DAP lineup (including the SP2000, SP1000 and SE100). Since the 2020 is a bit more tamed in the treble than the V2 Andromeda, the SR25/Andromeda 2020 pairing might be good as it may bring out the edge in the treble and the Andromeda V2 might be a bit sizzling with that pairing. Sony DAPs are generally warmer sounding than AK DAPs (except for the WM1A with Andromeda V2 which I find a really good pairing with excellent bass response except for the hissing during quiet room listening session).
1A/1Z is an excellent pairing w/ the Andros. I've also tried the SP2000 and AR15 which I like immensely as well (lowest floor noise I've experienced for a DAP).