morning to you... up early to see if rory can get his holy grail at st andrews today!!
to reply to your query, unfortunately my ank 4.1 was gone before the 005 arrived so i cannot definitively report the sonic differences from direct trial/comparison
i had my 4.1 for about 18 mos, enjoyed it immensely, it surpassed so many well regarded sub-$5000 dacs i tried over that time (audio mirror, denafrips, sonnet/metrum, schiit and so on), but over time i found i preferred a (well done) variable output dac to run straight into power amps (i barely ever listen to records anymore as my digital front end has improved), the 4.1 sounded really wonderful but as you know, it is a giant square box tall wide and deep, and i could not use upsampling as the inputs are limited to 24-96
that said, my notes on the 4.1 sonically are as follows
- rich saturated sound, very clear treble (not in the least rolled off as one might expect from a tube output dac) - i suspect one can play with this by tube rolling the 5687 output stage tubes, but mine came with excellent old stock tungsols which i did not fool with, i know from my earlier experience with dan wright’s tube gear that they are tip-top examples of that tube type
- luscious well embodied midrange with a wonderful dimensionality that great tube gear brings, very pure tone/timbre - solo piano on that thing was sooo lovely, effortless detail with weight and body, very realistic attack and decay
- bass was pretty tight pretty fast but did not plumb lowest register quite as well as the best, at the same time, there was great air and natural reverb to bass notes (think audio research reference series tube amp bass, versus pass labs solid state bass)
- the unit imaged very well, but not quite as well as the best of what i am enjoying now (chord stack, msb), i must say i have (reluctantly) become a believer in well implemented upsampling and filtering in dacs, in my experience it really restores (or embodies) the music with spatial cues, and clean resolution of more complex passages...
from memory (always a little suspect) i would venture to say that the 005 vs 4.1 -- about same in the treble (both top notch, transparent without any digititis), 005 bass more solid/deep but less tuneful, 4.1 midrange tone and body somewhat more ’magical’, soundstaging/ambient retrieval 4.1 somewhat better - how’s that for an audiophile’s word salad??... 🤣
hope that helps