I use the Abyss straight out of my Dave and it drives it just fine...I also have the Moon 430 which is a fantastic amp...that said,straight out of the Dave is simply better..more transparent...if you like the colored sound of an amp any amp that is obviously personal preference
The old amp debate again
I got them both but moon 600i insted of 430 , and honestly i would say the best sound is someware in between them two, but the favor is laying towards DAVE
( DAVE -II-- 600i)
When you listen to DAVE you feel you are losing a bit life "room presents" , atmosphere , bottom end are more numb,
and it sound a bit flat ( especially with headphones like HD650 or HD800), if you have heard the band plaing live in a studio which i have on a very few albums i got in my possession for example.
With the Moon, you receive a bigger more richer balanced / fuller and slight smoother ( colorised) sound, but less transparancy, not perfect, but some friends who like to listen to music and play instruments and like high end gear but who only have read about it, are trouly blown away when i start with just DAVE, and then attach the Moon to the mix.
They do not understand wich combination they have listen to. But in the end they favor the 600i in the mix because the sound got more life and feel more musical and impact-ful.
To my ears who are more experienced HiFi listener can say that the DAVE alone is the best, no question about it, but in the long term it is more easy to listen to the DAVE with a high end amp
So i would have liked a few filtersettings on DAVE would have been great, so you can control it for your self from track to track.
No normal person like it to sterile / flat with a microscopic lence feel in every detail or flaw, it does not sound like that in real life, because we are not accuse to it. When we listen to a concert the sound are also slight colorised with warmth from the acustics in the music hall or from the mixing tables ( if non classical ) .
So yes slight color do we all humans like, so my guess is that the Hugo 2 with the Mojo filter + Blue II combo could be a hit. I got them both on order, and will compare the Blu II + Hugo2 with DAVE and vice versa.