Shure SM7dB Technisches Handbuch

SM7dB

Vocal Microphone with Active Preamp

SM7dB online user guide.

Version: 2.0 (2023-I)

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Table of Contents

SM7dB Vocal Microphone with Active Preamp 3

SAFETY PRECAUTIONS 3

General Description 3

Powering the SM7dB Preamplifier 3

Preamplifier Best Practices 3

Using Variable Impedance Mic Preamplifiers 4

Microphone Placement 4

Windscreen 5

Adjust Back Panel Switches 5

Switching Microphone Orientation 6

Install or Remove the Stand Adapter 7

Specifications 8

Accessories 11

Furnished Accessories 11

Replacement Parts 11

Certifications 11

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SM7dB 

Vocal Microphone with Active Preamp

SAFETY PRECAUTIONS

Before using this product, please read and save the enclosed warnings and safety instructions.

WARNING:Ignoringthesewarningsmaycausesevereinjuryordeathasaresultofincorrectopera

tion.

If water or other foreign objects enter the inside of the device, fire or electric shock may result.

Do not attempt to modify this product. Doing so could result in personal injury and/or product failure.

CAUTION:Ignoringthesecautionsmaycausemoderateinjuryorpropertydamageasaresultofin

correct operation.

Never disassemble or modify the device, as failures may result.

Do not subject to extreme force and do not pull on the cable or failures may result.

Keep the microphone dry and avoid exposure to extreme temperatures and humidity.

General Description

The Shure SM7dB dynamic microphone has a smooth, flat, wide-range frequency response appropriate for content creation,

speech,music,andbeyond.Abuiltinactivepreamplifierprovidesupto+28dBoflownoise,flat,transparentgainwhilepre

serving frequency response for a clean, classic sound. The SM7dB's built-in preamp delivers the legendary sound of the

SM7B,completelyuncompromisedandwithouttheneedforaninlinepreamplifier.TheSM7dBbackpanelswitchesallowcus

tomized frequency response and the ability to adjust or bypass the preamp.

Powering the SM7dB Preamplifier

Important: The SM7dB requires +48 V phantom power to operate with the preamplifier engaged. It will operate in bypass

mode without phantom power.

To deliver audio directly to a computer, use an audio interface with an XLR input that provides +48 V phantom power, such as

the Shure MVi or MVX2U, and turn phantom power on.

When connecting to a mixer, use only balanced, microphone-level inputs with phantom power. Turn phantom power on for the

channel your SM7dB is connected to.

Depending on your interface or mixer, phantom power may be enabled through a switch, a button, or control software. Refer to

the user guide for your interface or mixer to learn how to engage phantom power.

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Preamplifier Best Practices

TheSM7dBfeaturesabuiltinactivepreamplifierwhichprovidesupto+28dBoflownoise,flat,transparentgainthatopti

mizes audio performance.

Adjust the gain level on the SM7dB before adjusting levels on your interface or mixer. This approach maximizes the signal-to-

noise ratio for a cleaner, clearer sound.

In podcast or quiet vocal applications, you are more likely to need the +28 dB setting, while louder talkers or singers may only

needthe+18dBsetting.Forinstrumentalapplications,youmayfindthatthe+18dBorthebypasssettingsreachtheidealin

put levels.

Using Variable Impedance Mic Preamplifiers

Select the highest available impedance setting on the external preamp when using the built-in preamp.

If you are using a low impedance setting to change the tonality for creative purposes, bypass the SM7dB's built-in preamp.

Keeping the SM7dB preamp engaged with a low-impedance setting will not yield the same changes in tone.

Microphone Placement

Speakdirectlyintothemic,1to6inches(2.54to15cm)awaytoblockoffaxisnoise.Forawarmerbassresponse,moveclos

er to the microphone. For less bass, move the microphone away from you.

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Velcro Cable Tie

Use the enclosed velcro tie to secure the cable.

Windscreen

Use the standard windscreen for general voice and instrumental applications.

When you speak, you may hear vocal pops from some consonant sounds (known as plosives). To prevent more plosive

sounds and wind noise, you can use the larger A7WS windscreen.

Adjust Back Panel Switches

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①Bass Rolloff Switch To reduce the bass, push the top-left switch down. This can help lower background hum from A/C,

HVAC, or traffic.

②Presence Boost For a brighter sound in mid-range frequencies, push the top-right switch up. This can help improve vocal

clarity.

③Bypass Switch Push the bottom-left switch to the left to bypass the preamp and achieve the classic SM7B sound.

④Preamp Switch To adjust the gain on the built-in preamp, push the bottom-right switch to the left for +18 dB and to the right

for +28 dB.

Switching Microphone Orientation

Boom and Microphone Stand Mounting Configuration

The SM7dB can be mounted on a boom arm or a stand. The default setup for the SM7dB is for a boom mount. To keep the

rear panel facing upright when mounted on a stand, reconfigure the mounting assembly.

To set up the SM7dB for a microphone stand:

Remove tightening nuts on the sides.

Remove the fitted washers, the lock washers, the outer brass washers, and the brass sleeves.

Slide the bracket off the microphone. Be careful not to lose the washers still on the microphone.

Invert and rotate the bracket. Slide it back onto the bolts over the brass and plastic washers still on the microphone.

ThebracketshouldfitsotheXLRconnectorfacestherearofthemicrophoneandtheShurelogoonthebackofthemi

crophone is right-side up.

Replace the brass sleeves. Be sure they are seated properly within the inner washers.

Replace the outer brass washers, the lock washers, and the fitted washers.

Replace the tightening nuts and tighten the microphone at the desired angle.

Note: If the tightening nuts do not hold the microphone in place, you may need to re-position the brass sleeves and the washers.

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Mounting Assembly - Exploded View

①Tightening nut

②Fitted washer

③Lock washer

④Brass washers

⑤Brass sleeve

⑥Mounting bracket

⑦Plastic washer

⑧Response switches

⑨Switch cover

⑩Windscreen

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Install or Remove the Stand Adapter

To mount the microphone on a 3/8 in. stand, insert the included brass stand adapter and tighten it with a coin or screwdriver.

Important: Make sure that the slots on the adapter face outward.

Specifications

Type

Dynamic (moving coil)

Frequency Response

50to20,000Hz

Polar Pattern

Cardioid

Output Impedance

Preamp engaged 27Ω

Bypass mode 150Ω

Recommended Load

>1kΩ

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Sensitivity

Flat response bypass mode 59dBV/Pa[1](1.12mV)

Flat response +18 preamp engaged -41 dBV/Pa[1] (8.91 mV)

Flat response +28 preamp engaged -31 dBV/Pa[1] (28.2 mV)

Hum Pickup

(typical, at 60 Hz, equivalent SPL/mOe)

11dB

Preamplifier Equivalent Input Noise

(A-weighted, typical)

-130 dBV

Polarity

Positive pressure on diaphragm produces positive voltage on pin 2 with respect to pin 3

Power Requirements

(with preamp engaged)

48 V DC [2] phantom power (IEC-61938) 4.5 mA, maximum

Weight

0.837kg(1.875lbs)

Housing

Black enamel aluminum and steel case with black foam windscreen

[1] 1 Pa=94 dB SPL

[2]All specifications measured with a 48 Vdc phantom power supply. The microphone operates at lower

voltages, but with slightly decreased headroom and sensitivity.

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Typical Frequency Response

Typical Polar Pattern

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