sorry...
I meant 280 v2 DAC!
There is no "280 v2 DAC". If you can be more precise, we can answer you better.
Here's a summary of Violectric's four DACs. I own the built-in DAC, V800, and RS 06 (but not the V850). I can hear the difference between the built-in DAC and the V800, but I can't describe it. I prefer the V800. I have not A/B'd the V800 and RS 06. Auditioned separately, they sound the same to me. The volume control on the V800 works great when connected directly to an amp (no preamp).
Built-in DAC:
* One D/A converter chip
* Older converter chip and design
* One input
* Must fit on add-on card
* Must sound good, but critical users are likely to purchase an external DAC.
V800:
* One D/A converter chip
* Older converter chip and design
* Four inputs
* No-excuses design
* Linear power supply
* Violectric case and face plate
* 24-bit digital volume control
Lake People DAC RS 06:
* Two D/A converter chips
* Newer converter chips and design
* Four inputs
* No-excuses design
* Switching power supply
* Lake People case and face plate
V850:
* Two D/A converter chips
* Newer converter chips and design
* Four inputs
* No-excuses design
* Linear power supply
* Violectric case and face plate
* 32-bit digital volume control with remote option
Here are the standard combinations:
With V800 or V850:
* V100
* V200 for more power
* V220 for preamp
* V280 for balanced
* V281 for balanced and preamp
With RS 06:
* RS02
* RS08 for balanced
* G109P for XLR inputs