Shure SM7dB Dynamic Vocal Microphone with Built-In Preamp
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Description
The SM7dB is the modern evolution of the legendary SM7B, featuring a custom Shure-designed built-in active preamplifier that provides up to +28 dB of clean gain. This eliminates the need for external gain boosters like the Cloudlifter, making the SM7dB work effortlessly with any XLR interface while preserving the iconic SM7 sound character. A bypass switch reverts the microphone to original SM7B passive performance.
Built-In Preamp
- Gain settings: +18 dB, +28 dB, or Bypass (original SM7B mode)
- Preamp noise floor: -130 dBV equivalent input noise (A-weighted)
- Power: 48V phantom power required when preamp is engaged; no power needed in bypass mode
- Output impedance: 27 ohms (preamp active) / 150 ohms (bypass)
Sound and Shielding
The same flat, wide-range frequency response as the SM7B, preserved identically at all gain settings. Bass rolloff and mid-range emphasis (presence boost) switches provide tone shaping. Advanced electromagnetic shielding eliminates broadband hum, and the internal air-suspension shock mount isolates against mechanical vibration.
Specifications
- Type: Dynamic (moving coil) with active preamp
- Polar pattern: Cardioid
- Frequency response: 50 Hz to 20,000 Hz
- Sensitivity (bypass): -59 dBV/Pa (1.12 mV)
- Sensitivity (+18 dB): -41 dBV/Pa (8.91 mV)
- Sensitivity (+28 dB): -31 dBV/Pa (28.2 mV)
- Connector: 3-pin XLR
- Phantom power: 48V DC (4.5 mA max) when preamp active
- Dimensions: 198.1 x 149.9 x 96.5 mm (7.8 x 5.9 x 3.8 in)
- Weight: 837 g (1 lb 13.8 oz)
In the Box
- Shure SM7dB microphone with integrated yoke mount
- Close-talk windscreen
- 3/8" thread adapter