I just got a pair of DPA 4060 to put into my Edirol R09 (mic in, low sens). I'm using a home-made battery box.
OK, I just got off the phone with Bruce Myers @ DPA. Amazing to get a human voice and a high-up one at that!
Anyway, to power DPA 406x properly from a 9v battery, you need a 3.3k load resistor. I first tried an 8.2k, and while it works great at low volume, it distorts pretty easily. It is worth noting that most "standard" battery boxes use a 10k load resistor, which apparantly is too high. So, even with 4061 (lower sens) you still need a proper resistor there. According to Bruce, all DPA share the same mic element, and the only difference is the preamp part, which should be matched to your battery box and preamp.
So check your ohms, volts and (milli)amps folks. I'll report back here with my progress.
Richard