The RV-1a is an NHK spec'ed Aiwa VM17, which was Japan's far-superior version of the RCA 77D. NHK was the main major broadcasting station in Japan and had microphones custom made to their specifications, much like RTF (French Radio and Television Broadcasting) and the BBC.
NHK ribbon models use better output transformers and components, and generally have a noticeably improved frequency response - which is saying a lot, because the Aiwa VM17 is one the best ribbon mics we've ever heard, far outperforming the RCA 77D/DX. As with most Japanese ribbons, it has a 5-position low roll-off switch at the bottom of the mic.
It is estimated that only 600-700 of these microphones were manufactured, and this one is number 23. As with all 77D-style microphones, this mic sounds best in its unobstructed bi-directional pickup pattern, with full but balanced low-end, a meaty midrange, and remarkably smooth top-end.
This RV-1a has been fully serviced, cleaned, and re-ribboned by Cole Suddarth at Cole Picks Vintage and comes with its original suitcase.
