Did you know that the last two microphone inputs on the Roland Octa-Capture USB audio interface have a different microphone input impedance from the other six? It’s true! The first six preamps have an input impedance of 5,000 ohms. But inputs 7 and 8 have an impedance of 10,000 ohms.
This fact is more than just audio interface trivia — the higher impedance on these preamp inputs is actually a smart design feature from the engineers at Roland — it makes those inputs ideal for use with passive ribbon microphones.