I mostly used the UA 610 Tube Preamp & EQ Collection as unison plugins with my Twin X interface. Both sound excellent, without a doubt. But since I bought the LA-6176 Signature Channel Strip, the two plugins have been "out of service" so to speak, also because they require a lot of DSP and they are not native. Actually, some of the coding should already be implemented in the LA-6176 and could probably be applied to the 610-B with little effort, I suspect. One star deducted for that.