Just wondering if anyone has any words of wisdom on this topic. I know it's not a simple question to answer, but I don't have any mics that have a worse signal to noise ratio below the mid 70s A-weighted. In practice, is a mic with an S/Nr in the low 70s going appear very noisey? I really notice the difference between a U87 with 80 dB when compared with my AT4060 that has a ratio of 75 when I A/B them, but I find the AT's noise floor perfectly acceptable, although one reason for this is the nature of the noise -it doesn't seem to get in the way of the recording. If I have a mic with an S/N figure of say 72 (such as the AKG C34) distance mic'ing a choir, am I likely to notice a lot of noise during the quiet passages? I'll be doing some work during the year where I require an ultra low noise floor, and it's great that there are so many new mics out there with very low noise and a ratio well into the 80s. I'm glad to have a cheaper alternative to the TLM-103 for this sort of work. Many thanks John PS it's a pity the U87 isn't a little quieter. It's absolutely amazing for birdsong recordings!