The unbalanced outputs on the V181 have half the power of the XLR out, so the V200 easily is more powerful there. I'd say the unbalanced outputs would be good for IEM's or other low impedance headphones as the gain is lowered on those and you have more control over the volume dial. The V200 is more refined sounding with better extension, more detail, better imaging. The V181 seems to have a slightly larger soundstage but that's probably because it's more neutral.
The RCA outputs on the back automatically are set to input mode, so you need to open the unit up and adjust the dip switches to set it to output. It will then convert the XLR input to a RCA output. It's not a pre-amp out as the volume is static and does not change. It will however go up or down depending on how the pre-gain is set. So if you have +6dB selected, the RCA will get this as well. You can probably use this on powered speakers but the input may be too strong and the use of in line attenuators might be required.
Edited by Zombie_X - 8/26/12 at 11:00am
Originally Posted by odyssey2001
What does the V200 better than the V181 when you use them with unbalanced output?
Can I use the "Unbal In/Out" to connect them to my speakers or is this a pre-amp output?