According to the DPA website, SDCs are less sensitive than LDCs:
http://www.dpamicrophones.com/page.php?PID=28
I always understood that this decreased sensitivity is why SDCs have higher self noise: the signal from an SDC has to be amplified more than the signal from an LDC.
I agree with the...
People fixate on the idea of tubes. The difference between tube anything and an equivalent solid-state item are fairly subtle, especially when you're talking about microphone preamps. The difference between a tube mic plugged into a nice solid-state pre and a tube mic plugged into a nice tube...
I like the T3 way better than the NTK. The NTK is way to bright and spitty, IMO. The T3 tones that down while still retaining enough high-end sheen to serve most vocalists well. Plus, as others have mentioned, it is multi-pattern.
I've heard that it's excellent on acoustic guitar, and hit-or-miss on vocals. It either loves you or it don't. But I don't have first hand knowledge of it.
This makes no sense. You would try it without and then see if there's no way you could get the mic to not clip. If you can't keep it from clipping, you use the pad. HOWEVER...
There's no way in hell a normal guitar player would need a pad for acoustic guitar. The only thing I've ever used a pad...
I liked my v67 on acoustic, especially nylon string acoustic. I also liked it pretty well on cello and vocals and any number of sources. I think it's a good mic.