Have Warm Audio saved the best until last? WA‑CX12 is a large-diaphragm tube condenser based on one of the world’s most sought-after microphones, the AKG C12. [A version of which, the C12 VR, is still available from the Harman-owned AKG brand for $6,989]. “The C12, a valve operated condenser, was a marvellous mic”, said Beatles-producer George Martin. […]