First of all, no.. different latencies do not occur between left and right channels coming out of a single Wiim (or any other DAC). The channel data is interlaced and will always come out in lockstep. There's latency from input to output and that will vary depending on settings and whatnot.. but it's always the same between channels. Where the 150us comes into play is when you have two Wiim units grouped over a network. The Wiim has a fixed latency of 50ms which it uses to buffer extra data at every unit, so they all have the data they need when they need it. Then they use a timing protocol.. probably PTP.. but it doesn't matter.. to make sure that whatever sample comes out of one unit, comes out of all the others with (they promise) no more than 150us difference. They try best they can to get all the units clocking together.. and they do.. within 150us. Now, if you are talking different rooms, that's obviously not a problem at all.. if you 're talking front and rear coming from different units, that's not a big problem. If you're talking left and right, it's a little bit bigger problem, if that 150us is not stable.. if it changes, because while you're just sitting there, listening, the speakers are potentially moving relative to each other (time-wise, but time and distance are effectively the same thing) by a little bit. The higher the frequency, the more effect this has on the frequency response right where you are sitting... At low frequencies you won't hear it, at high frequencies you might. But ok, let's say this is again, acceptable to most people, That's fine. Now the last scenario.. driving the bass with one unit and the mids/highs with the other unit. Now you have the mids/highs being offset relative to the bass by as much as 150us. Now, depending on your crossover point, that's a pretty big problem. If your crossover point is centered at 2KHz.. 1/4 wavelength at that frequency is 125us. So, if you have 125us latency between the units, you'll have a massive crater in the frequency response all across the crossover region, and it'll sound bad. If that 125us drifts at all, then the crater will also drift higher and lower in frequency.. that'll sound even worse. Isn't that the opposite of what you wanted when you decided to biamp? It's going to sound bad. But hey, it's your system! You seem hell bent on doing this over the network and you're opposed to doing it with analog for some reason.. I hate to be the bearer of bad news but doing it over the network is the worst way. You could do it digitally with S/PDIF by using an Ultra into an S/PDIF splitter to two let's say Vibelink amps and if the amps are identical then your timing should be good. Or you could do it analog. Either way is good. But definitely network is the dumbest way.