What it is and what it was built for
A professional cardioid dynamic microphone introduced in 1973 as a downsized update of the SM5. Built for broadcast: radio and television announcers needed durability, SPL handling, and controlled proximity effect in live environments.
How it works, in terms a player would use
It is a dynamic microphone with two recessed tone-shaping switches: one high-pass filter, one mid-frequency reduction. It uses a modified Unidyne III element tuned for lower frequency response. It requires no phantom power. Its cardioid pattern rejects off-axis sound. It handles high SPL without distortion.
What it does better than anything else
It tames aggressive vocal sources without compression or EQ—its mid-reduction switch flattens presence peaks, and its high-pass filter cleans rumble without phase smear. Its dynamic construction and cardioid pattern make it forgiving in untreated rooms and resistant to feedback during loud monitoring.
What it does badly
It lacks extended high-end air and transient detail compared to condensers. Its output is low, demanding high-gain, low-noise preamps. It does not reject electromagnetic interference in the original 1973 model. It offers no pad, no polar pattern switching, and no built-in pop filtering beyond the windscreen.
What people made with it
Bruce Swedien used it for Michael Jackson’s Thriller vocals. James Hetfield used it for Metallica’s St. Anger (2001–2003). Engineers have used it on horns, guitar cabinets, bass cabinets, and kick drum.
Who should use it, and who should not
Broadcasters, podcasters, and vocalists recording in untreated spaces who prioritise consistency over tonal flexibility. Not for engineers who need surgical EQ control at source, or for quiet acoustic sources without high-output preamps.
Is it worth your time
Yes—if you need a broadcast-grade vocal mic that tames sibilance and proximity effect without external processing, and you can supply enough clean gain. No—if you rely on plug-in EQ to sculpt tone or need consistent low-end extension without boosting.
