Shure Beta 58 A Dynamic Vocal Microphone

Key Specifications

Capsule/Cartridge Type: Both are dynamic (moving coil) microphones.

Polar Pattern: Shure SM58 features a cardioid pattern (wider, more forgiving rear rejection); Shure Beta 58A features a tighter supercardioid pattern (narrower front focus and higher side rejection).

Frequency Response: Shure SM58 ranges from 50 to 15,000 Hz; Shure Beta 58A has an extended high-end, ranging from 50 to 16,000 Hz.

Sensitivity (at 1 kHz): Shure SM58 is –54.5 to –56.0 dBV/Pa (1.6 to 1.85 mV); Shure Beta 58A uses a neodymium magnet providing a hotter output at –51 dBV/Pa (2.8 mV)—roughly 4 dB hotter.

Output Impedance: Shure SM58 is 150–300 Ω rated; Shure Beta 58A is 150 Ω rated.

Net Weight: Shure SM58 is 0.33 kg (0.72 lbs / 10.5–13 oz); Shure Beta 58A is lighter at 0.278 kg (0.62 lbs).

Grille Design: Shure SM58 uses a standard spherical steel-mesh grille; Shure Beta 58A uses a hardened, dent-resistant steel mesh grille.