SHORTLINK ROUTER: /go/shure-sm7b Era 4 Benchmark: Passive Moving-Coil [P]

Shure SM7B Cardioid Moving-Coil Dynamic Studio Microphone

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HARDWARE PROCUREMENT DOSSIER // DOC-SHURE-SM7BEra 4 Benchmark: Passive Moving-Coil [P]Dynamic voice coil attached to Mylar diaphragmUniform Cardioid

The canonical modern descendant of Wente & Thuras's 1931 Western Electric 618A moving-coil transducer. By attaching a copper voice coil to the diaphragm inside a permanent magnetic gap, it eliminates the 200 V polarizing supply and vacuum-tube head amp of early condensers—at the cost of higher moving mass and slower transient response.

STOREFRONT ROUTING

01 // TRANSDUCER ARCHITECTUREMoving-Coil Dynamic (Unidyne III acoustic cartridge)

02 // POWER & CONVERSIONPassive balanced XLR output (-59.0 dBV/Pa sensitivity; requires external preamp with 60+ dB clean gain)

03 // REF PRICE (USD PRIMARY)

$399.00(THB 22,400)

4-CLAIM DATASHEET VERIFICATION MATRIX[P] PRIMARY DATASHEET | [S] INDEPENDENT TEST | [?] UNVERIFIED

Transducer Physics: Moving-Coil vs. Capacitor[P] PASS

Uses a voice coil suspended in a magnetic field rather than a charged parallel-plate capacitor.

Zero Polarizing Voltage Requirement[P] PASS

Generates current directly via electromagnetic induction; immune to humidity-induced capsule arcing and requires no phantom power.

Symmetrical Cardioid Pattern[P] PASS

Unidyne III single-element phase-shift acoustic network provides uniform cardioid rejection across frequency bands.

Internal Pneumatic Air-Suspension Isolation[P] PASS

Internal air-suspension shock isolator mechanically decouples the cartridge without external elastic bands.

Check Price on Amazon ($399.00)Shopee Thailand (THB 22,400)Primary Spec Source [P]

specandcraft.com/go/shure-sm7b

Affiliate Disclosure: As an Amazon Associate, Spec & Craft earns from qualifying purchases. We also participate in the Shopee Thailand Affiliate Program.

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ENGINEERING AUDIT NOTE [P]

As documented in Shure's 'Microphone Techniques for Music', moving-coil assemblies have roughly twice the transient rise time of low-mass condenser membranes, trading ultra-fine high-frequency detail for ruggedness and extreme SPL handling.