Shure SM58 (1966–)

At 298 grams, it hangs in the hand like a hammer, and it has outlasted nearly every stage it was ever dropped on.

Overview

The Shure SM58 is a professional cardioid dynamic microphone, first produced in 1966 and still rolling off the line today. That is sixty years of continuous production for a single model. It was designed as a purpose-built solution for live vocal performance, and the design brief has never really needed revising. Owners report it delivers consistent performance under punishing conditions. That earned it the "industry standard" label for live vocal work, and it turns up in sticky-floored clubs, church pulpits, and festival stages with equal regularity.

The SM58 is not a detailed, transparent, or flattering microphone. It is not the most detailed mic ever made, nor the most transparent. It is resistant to feedback, forgiving of poor technique, and nearly indestructible. The tailored vocal response gives a sound that has become a world standard for singing or speech, and the cardioid pattern keeps the room out of the vocal without asking the performer to hold still. Critics exist. Martin Mitchell Microphones notably declined to recommend it, citing alternatives with more nuance.

Key Features

Controlled Reluctance Dynamic Element

The SM58 uses a controlled reluctance dynamic element, a moving-coil design that generates signal without phantom power and without a preamp tube. Nothing in it needs external power, so it works with any PA system. The controlled reluctance transducer also contributes to the mic's stability: output stays consistent even when the thing has been bounced around a van for a decade. The sensitivity is specified at -54.5 dBV/Pa (1.85 mV) at 1,000 Hz, and the output impedance is reportedly 150 ohms. That figure appears in available documentation but is not corroborated across sources, so treat it as approximate.

Pneumatic Shock-Mount System

Handling noise is the enemy of a handheld vocal mic, and the SM58 deals with it using a pneumatic shock-mount system. That is an internal suspension with air-filled chambers that isolate the element from the body of the microphone. Every thump of the stand and every grab of the grille gets absorbed before it reaches the capsule. Thomann's product copy independently describes the same shock-absorbing arrangement, and the design has stayed essentially unchanged for decades. Collectors note the system tends to remain effective even after long service, unless the mic has taken a severe impact.

Spherical Wind and Pop Filter

The steel ball grille is not cosmetic. Inside it sits a spherical wind and pop filter, a dual-layer mesh structure that diffuses plosives before they reach the diaphragm. The curvature of the grille scatters airflow evenly rather than presenting a flat face to a hard "p" or "b," which is why the SM58 can be worked close without an external pop shield. Thomann's listing describes effective integrated pop and wind filters, and the design has changed little since introduction.

Tailored Frequency Response for Vocal Clarity

The frequency response runs 50 to 15,000 Hz, and it is far from flat. That is deliberate. There is a presence boost in the upper midrange, typically around 4 to 8 kHz, that lifts vocal intelligibility and helps a voice cut through a dense mix. Below 100 Hz a mild low-end roll-off tames stage rumble and proximity effect, and the cardioid pattern rejects off-axis sound to keep the monitors and drums out of the vocal channel. Thomann's copy describes the same shape: optimized response with bass roll-off and present mids. These are the source's descriptive claims rather than confirmed spec-sheet figures with a tolerance.

Zinc-Alloy Body and Hardened Steel Grille

The casing is durable zinc-alloy with a hardened steel grille, and the whole assembly weighs 298 grams. It feels like a tool, not a toy. Shure's own period advertising made the durability case bluntly, claiming SM58s that had been in service for twelve years still passed performance standards competitors couldn't meet when brand new. That is marketing. The mic connects via a standard XLR output for compatibility with any audio system, and it needs no external power of any kind.

Historical Context

The SM58 was first produced in 1966, positioned from the start as a purpose-built answer to the real-world problems of live vocal work: feedback, handling noise, and fragility. By 2016 it had reached its 50th anniversary, marked by Shure with the special edition SM58-50A. Shure's own materials have called it the world's most popular mic, and the company's retrospective framing, asking whether it is the most popular microphone of all time, is at least partly self-serving. Shure has also noted that every associate received an SM58 protected in the original 1966 packaging.

Collectibility & Value

The SM58 is a working tool, not an investment, and the market reflects that. Original retail pricing was reportedly $99 USD, a figure that held stable for over two decades before rising to $110, though the source qualifies that number as unverified and single-source. The limited-run SM58-50A anniversary model carried a premium of $109 at release. Used units in working condition often sell for as little as $89 during promotions, and the microphone remains widely available new. No documented data exists on long-term value appreciation. Collectors chase anniversary editions and early production units, whose appeal is cultural rather than financial. The mic is also widely rentable, available for hire in cities from Chicago outward.