DPA stands for Danish Pro Audio. The company spun off from B&K (Brüel & Kjær) measurement microphones in 1992, which is why DPA mics measure so neutrally — they were designed by the people who built the world’s most precise measurement mics.
DPA’s 4060/4061 lavalier microphone is the single most-used lapel mic in serious productions. Broadway, opera houses, NFL on-field cameras, presidential addresses — all DPA. They’re tiny, durable, and they sound like a much bigger studio condenser shrunk down to clip on a lapel.
DPA also makes the d:vote series for instruments and the d:dicate small-diaphragm condensers used on orchestras worldwide.