if you own the Radius 40 and the 002?...do you? if your asking how you should use these togather, well there are many ways. first you could use the TLM 103 into the Radius 40, then into the 002 (via line level ins as apposed to the preamp in) that would work great as a vocal chain and even a DI for bass, or any mono recording like accoustic guitar... utilizing the tubes in the 40 would give you a different "flavor" plus the compression section will be fery helpful to lightly tame signals going into PT's also you can use the 002 pres (which I've heard are pretty clean sounding) for any stereo tracking or when you need clean sounding pre's for keyboards, piano, or anything else not colored by the tubes in the 40. in other words you could use both for different things..the 002 for clean and the 40 for flavor..it certainly doesnt hurt to have a variety of sounds to choose from when recording, both would be great tools. good luck!