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What makes the Shure 556S microphone stand out in a crowded lineup? These 127 specs & features — especially general information, dimensions & weight, audio performance & connectivity & interfaces — are a good start.
637.81 Ω lower impedance loads The minimum load impedance required for optimal microphone performance and to avoid signal distortion. 150.0 Ω vs 787.8 Ω
A fast snapshot of the Shure 556S, covering its standout specification and what you can expect right out of the box.
Shure 556S
The Shure 556S is a vintage Unidyne II dynamic microphone known for its clear, focused sound. Its cardioid pattern and sturdy metal design help minimize background and handling noise.
Specifications & Facts 127
Specs measured. Drama avoided.
Is the Shure 556S worth it? Compare its 127 specs — including the well-loved general information, dimensions & weight, audio performance & connectivity & interfaces — plus price and performance vs other microphones.
General Information 18
Shure 556S Year of Release
What year was it released?
0 Shure 556S 0 Votes 1950
74 Microphones in this range 2023
Shure 556S
The 556S first appeared in the early 1950s, during the golden age of broadcast and stage entertainment. It remained a go-to for public address and recording studios for decades, making it one of the most historically significant microphones of its era.
Indicates when the microphone was launched.
When it comes to Year of Release, Shure 556S ◉ is worse than Microphone in this range ◉ , delivering equal 74 score measurement.
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Shure 556S Country of Origin
What is the country of origin?
77 Shure 556S 0 Votes United States
77 Microphones in this range China
Shure 556S
Manufactured by Shure Brothers, Evanston, Illinois (later Arlington Heights) — a hallmark of American microphone craftsmanship in the mid-1900s.
Manufacturing or design origin.
When it comes to Country of Origin, Shure 556S ◉ is same as Microphone in this range ◉ .
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Shure 556S Product Type
What is the product type?
27 Shure 556S 0 Votes Dynamic
62 Microphones in this range Condenser
Shure 556S
A classic moving-coil dynamic microphone, meaning it works without batteries or phantom power. Known for its durability and resistance to moisture and distortion, this type is ideal for live performances and stage vocals, handling loud sound levels effortlessly.
Defines the basic category of the microphone.
When it comes to Product Type, Shure 556S ◉ is worse than Microphone in this range ◉ , delivering equal 35 score measurement.
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Shure 556S Model Name
What is the model name?
60 Shure 556S 0 Votes Unidyne 556S
66 Microphones in this range Super 55 Deluxe
Shure 556S
The “Unidyne 556S” is part of Shure’s iconic Unidyne family, one of the first directional mics to achieve consistent cardioid pickup. The “S” stands for “Small”, referring to its more compact body compared to the earlier 55 series “Elvis” microphone.
The specific product identifier from the manufacturer.
When it comes to Model Name, Shure 556S ◉ is worse than Microphone in this range ◉ , delivering equal 6 score measurement.
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Shure 556S Series/Line
What series/line does it belong to?
61 Shure 556S 0 Votes Unidyne II
65 Microphones in this range Evolution Series
Shure 556S
Belongs to Shure’s Unidyne II generation, introduced to refine the original Unidyne’s sound clarity and directionality. This model helped define Shure’s reputation for reliable broadcast and stage microphones through the mid-20th century.
Identifies the product line or collection the microphone belongs to.
When it comes to Series/Line, Shure 556S ◉ is worse than Microphone in this range ◉ , delivering equal 4 score measurement.
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62 Microphones in this range Studio, Live, Podcast, Broadcast, Instrument, Streaming
Shure 556S
Designed for professional use across diverse applications such as radio broadcast, stage vocals, public address, and studio recording. Its ability to reject background noise made it a standard choice for announcers and stage performers.
Describes the primary application area.
When it comes to Intended Use, Shure 556S ◉ is worse than Microphone in this range ◉ , delivering equal 10 score measurement.
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Shure 556S Compatibility
Which devices or platforms are compatible?
43 Shure 556S 0 Votes PC, Mac, iOS, Android, Mixer, Camera, Karaoke Machine, Audio Interface, PA System
53 Microphones in this range Mixer, Audio Interface, PA System
Shure 556S
Works seamlessly with analog mixers, amplifiers, and audio interfaces via its 3-pin XLR output. The internal impedance selector switch allows connection to both low- and high-impedance systems, a rare flexibility for vintage mics.
Lists supported platforms and devices.
When it comes to Compatibility, Shure 556S ◉ is worse than Microphone in this range ◉ , delivering equal 10 score measurement.
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Shure 556S Form Factor
What is the form factor?
37 Shure 556S 0 Votes Handheld
51 Microphones in this range Handheld
Shure 556S
Compact and handheld, though typically used mounted on a stand for presentations or vocal performances. The built-in swivel base lets the user angle the mic without needing an external clip.
Describes the physical style of the microphone.
When it comes to Form Factor, Shure 556S ◉ is worse than Microphone in this range ◉ , delivering equal 14 score measurement.
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Shure 556S Polar Pattern Type
What is the polar pattern type?
47 Shure 556S 0 Votes Cardioid
59 Microphones in this range Cardioid
Shure 556S
The cardioid pattern focuses pickup from the front, rejecting sound from the sides and rear. This makes it highly effective in noisy or reflective environments — ideal for reducing feedback on live stages or during public speaking.
Identifies the default pickup pattern.
When it comes to Polar Pattern Type, Shure 556S ◉ is worse than Microphone in this range ◉ , delivering equal 12 score measurement.
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Shure 556S Connectivity Type
What is the connectivity type?
27 Shure 556S 0 Votes Wired, XLR
49 Microphones in this range Wired, XLR
Shure 556S
Equipped with a professional 3-pin XLR connection, ensuring secure, balanced audio transmission with low interference. Common in studio and stage setups.
Defines how the microphone connects to devices.
When it comes to Connectivity Type, Shure 556S ◉ is worse than Microphone in this range ◉ , delivering equal 22 score measurement.
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Shure 556S Color Options
What are the color options?
72 Shure 556S 0 Votes Silver
78 Microphones in this range Black
Shure 556S
Features a satin-chrome metal finish that gives it a professional, polished look while also providing resistance to scratches and corrosion.
Available product colors.
When it comes to Color Options, Shure 556S ◉ is worse than Microphone in this range ◉ , delivering equal 6 score measurement.
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Shure 556S Mounting Type
What is the mounting type?
27 Shure 556S 0 Votes Stand
43 Microphones in this range Clip
Shure 556S
Built to attach to standard 5/8-inch-27 thread microphone stands via its integrated self-tightening swivel mount — a common setup for podiums and performers.
The typical mounting or support style.
When it comes to Mounting Type, Shure 556S ◉ is worse than Microphone in this range ◉ , delivering equal 16 score measurement.
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Shure 556S Gender Target
What is the gender target?
87 Shure 556S 0 Votes Unisex
98 Microphones in this range Unisex
Shure 556S
Designed for universal use — equally suited to male or female vocalists, announcers, and performers.
The marketing target by gender (if specified).
When it comes to Gender Target, Shure 556S ◉ is worse than Microphone in this range ◉ , delivering equal 11 score measurement.
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Shure 556S Age Group
What is the age group?
52 Shure 556S 0 Votes Adult, Professional
62 Microphones in this range Adult, Professional
Shure 556S
Marketed to adults and professionals in broadcast, recording, and stage performance rather than consumer hobbyists.
The intended user age bracket.
When it comes to Age Group, Shure 556S ◉ is worse than Microphone in this range ◉ , delivering equal 10 score measurement.
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Shure 556S Recording Application Category
What recording applications is it best for?
55 Shure 556S 0 Votes Studio, Live, Broadcast
70 Microphones in this range Studio, Live, Podcast, Broadcast, Streaming
Shure 556S
Frequently seen in radio studios, stage rigs, and theaters for both speech and vocal capture. Its cardioid pattern made it popular among early sound engineers for minimizing background noise.
Specific contexts where the mic is best suited.
When it comes to Recording Application Category, Shure 556S ◉ is worse than Microphone in this range ◉ , delivering equal 15 score measurement.
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Shure 556S User Skill Level
What is the user skill level?
87 Shure 556S 0 Votes Professional
70 Microphones in this range Professional
Shure 556S
Aimed at professional sound operators and performers; however, its plug-and-play simplicity also makes it approachable for enthusiasts.
Recommended audience expertise level.
When it comes to User Skill Level, Shure 556S ◉ is better than Microphone in this range ◉ , delivering higher 17 score measurement.
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Shure 556S Launch Region
Where is it available?
87 Shure 556S 0 Votes Global
97 Microphones in this range Global
Shure 556S
Sold internationally and widely adopted by broadcast stations and theaters worldwide through the 1950s–1970s.
Where the product is primarily available.
When it comes to Launch Region, Shure 556S ◉ is worse than Microphone in this range ◉ , delivering equal 10 score measurement.
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Shure 556S Limited Edition
Is it a limited/special edition?
No 0Votes Shure 556S
Yes Microphones in this range
Shure 556S
This model was part of Shure’s standard production line — not a limited or commemorative edition.
Whether the model is a limited or special release.
When it comes to Limited Edition, Shure 556S ◉ is worse than Microphone in this range ◉ .
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Dimensions & Weight 13
Shure 556S Width
What is the width?
2.19 inch 0Votes
2.59 inch (Average)
Shure 556S
Measures roughly 5.6 cm wide, about the same as a modern smartphone’s width — compact for its time, considering earlier Unidynes were bulkier.
The microphone’s overall width.
When it comes to Width, Shure 556S ◉ is better than Microphone in this range ◉ , delivering higher 0.4 inch measurement.
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Shure 556S Depth
What is the depth?
3.07 inch 0Votes
2.79 inch (Average)
Shure 556S
Equals about 7.8 cm deep, with a rounded housing that gives it the signature “vintage microphone” look.
The microphone’s overall depth.
When it comes to Depth, Shure 556S ◉ is worse than Microphone in this range ◉ , delivering equal 0.3 inch measurement.
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Shure 556S Height
What is the height?
7.76 inch 0Votes
5.55 inch (Average)
Shure 556S
Stands ≈19.7 cm tall, similar in height to a large travel mug — easy to handle or mount on most standard microphone stands.
The microphone’s overall height.
When it comes to Height, Shure 556S ◉ is worse than Microphone in this range ◉ , delivering equal 2.2 inch measurement.
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Shure 556S Weight
What is the weight?
1.81 lbs 0Votes
0.83 lbs (Average)
Shure 556S
Weighs ≈0.82 kg (without cable). Substantial enough to feel sturdy in hand yet balanced on stands — a hallmark of the 1950s die-cast builds.
The microphone’s physical weight.
When it comes to Weight, Shure 556S ◉ is worse than Microphone in this range ◉ , delivering equal 1.0 lbs measurement.
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Shure 556S Cable Length
What is the cable length?
20 ft 0Votes
7.82 ft (Average)
Shure 556S
Comes with a 6.1-meter shielded two-conductor cable, long enough for podium or studio use without needing extensions.
Length of the included or integrated cable.
When it comes to Cable Length, Shure 556S ◉ is better than Microphone in this range ◉ , delivering higher 12.2 ft measurement.
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Shure 556S Mounting Thread Size
What is the mounting thread size?
67 Shure 556S 0 Votes 5/8"
74 Microphones in this range 5/8"
Shure 556S
Standard North American mic stand thread — compatible with modern stands and adapters even today.
The thread size for mounting compatibility.
When it comes to Mounting Thread Size, Shure 556S ◉ is worse than Microphone in this range ◉ , delivering equal 7 score measurement.
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Shure 556S Package Width
What is the package width?
4.53 inch 0Votes
6.76 inch (Average)
Shure 556S
Approx. 22.9 cm — inferred from period packaging. Shure’s original retail boxes were compact and foam-lined for protection.
The shipping package’s width.
When it comes to Package Width, Shure 556S ◉ is better than Microphone in this range ◉ , delivering higher 2.2 inch measurement.
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Shure 556S Capsule Diameter
What is the capsule diameter?
2.19 inch 0Votes
133.62 inch (Average)
Shure 556S
Roughly 3.2 cm diaphragm diameter typical of mid-century Unidyne cartridges. Offers warm low-end and smooth vocal clarity.
The diameter of the microphone capsule.
When it comes to Capsule Diameter, Shure 556S ◉ is worse than Microphone in this range ◉ , delivering equal 131.4 inch measurement.
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Shure 556S Package Depth
What is the package depth?
4.53 inch 0Votes
5.34 inch (Average)
The shipping package’s depth.
When it comes to Package Depth, Shure 556S ◉ is better than Microphone in this range ◉ , delivering higher 0.8 inch measurement.
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Shure 556S Package Height
What is the package height?
7.76 inch 0Votes
6.23 inch (Average)
The shipping package’s height.
When it comes to Package Height, Shure 556S ◉ is worse than Microphone in this range ◉ , delivering equal 1.5 inch measurement.
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Shure 556S Capsule Length
What is the capsule length?
3.07 inch 0Votes
2.29 inch (Average)
The length of the microphone capsule.
When it comes to Capsule Length, Shure 556S ◉ is better than Microphone in this range ◉ , delivering higher 0.8 inch measurement.
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Shure 556S Base Footprint Diameter
What is the base/stand footprint diameter?
2.19 inch 0Votes
2.61 inch (Average)
Diameter of the microphone base or stand footprint.
When it comes to Base Footprint Diameter, Shure 556S ◉ is better than Microphone in this range ◉ , delivering higher 0.4 inch measurement.
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Shure 556S Grill Diameter
What is the grill diameter?
2.2 inch 0Votes
1.57 inch (Average)
The diameter of the protective microphone grill.
When it comes to Grill Diameter, Shure 556S ◉ is better than Microphone in this range ◉ , delivering higher 0.6 inch measurement.
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Audio Performance 15
Shure 556S Microphone Type
What is the microphone type?
47 Shure 556S 0 Votes Dynamic
65 Microphones in this range Condenser
Shure 556S
Durable, low-maintenance, and immune to moisture or temperature changes — perfect for rugged use.
Defines the operating principle of the microphone.
When it comes to Microphone Type, Shure 556S ◉ is worse than Microphone in this range ◉ , delivering equal 18 score measurement.
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Shure 556S Frequency Response (Min)
What is the minimum frequency response?
40 Hz 0Votes
38.27 Hz (Average)
Shure 556S
Captures deep vocal fundamentals and most instruments; 40 Hz ≈ low E on a bass guitar.
The lowest frequency the mic can capture.
When it comes to Frequency Response (Min), Shure 556S ◉ is worse than Microphone in this range ◉ , delivering equal 1.7 Hz measurement.
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Shure 556S Frequency Response (Max)
What is the maximum frequency response?
15,000 Hz 0Votes
18,030.24 Hz (Average)
Shure 556S
Covers the full range of speech and vocals, providing a natural yet slightly warm sound typical of vintage dynamics.
The highest frequency the mic can capture.
When it comes to Frequency Response (Max), Shure 556S ◉ is worse than Microphone in this range ◉ , delivering equal 3,030.2 Hz measurement.
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Shure 556S Sensitivity
What is the sensitivity?
-64 dBV/Pa 0Votes
-42.78 dBV/Pa (Average)
Shure 556S
Converted from the original spec of −56 dB re 1 V/µbar; typical output for passive dynamics. Works best with preamps providing +50 dB or more of gain.
Output level relative to sound pressure.
When it comes to Sensitivity, Shure 556S ◉ is worse than Microphone in this range ◉ , delivering equal 21.2 dBV/Pa measurement.
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Shure 556S Directionality
What is the directionality?
47 Shure 556S 0 Votes Unidirectional
59 Microphones in this range Unidirectional
Shure 556S
Rejects sound effectively from the rear and sides — approximately 15–20 dB at 180° and 6 dB at 90° per Shure’s chart.
General pickup orientation.
When it comes to Directionality, Shure 556S ◉ is worse than Microphone in this range ◉ , delivering equal 12 score measurement.
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Shure 556S Acoustic Principle
What is the acoustic principle?
57 Shure 556S 0 Votes Pressure Gradient
65 Microphones in this range Pressure Gradient
Shure 556S
Uses acoustic ports behind the diaphragm to create its cardioid directionality — the same basic technology in many modern stage mics.
The underlying sound capture mechanism.
When it comes to Acoustic Principle, Shure 556S ◉ is worse than Microphone in this range ◉ , delivering equal 8 score measurement.
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Shure 556S Signal-to-Noise Ratio
What is the SNR?
68 dB 0Votes
76.19 dB (Average)
Shure 556S
Approximate figure for comparable vintage dynamics — good noise performance given its passive design.
The clarity ratio between signal and background noise.
When it comes to Signal-to-Noise Ratio, Shure 556S ◉ is worse than Microphone in this range ◉ , delivering equal 8.2 dB measurement.
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Shure 556S Output Impedance
What is the output impedance?
150 ohm 0Votes
312.26 ohm (Average)
Electrical resistance of the microphone’s output.
When it comes to Output Impedance, Shure 556S ◉ is better than Microphone in this range ◉ , delivering higher 162.3 ohm measurement.
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Shure 556S Stereo/Mono Mode
What mode is supported?
7 Shure 556S 0 Votes Mono
24 Microphones in this range Mono
Determines recording mode.
When it comes to Stereo/Mono Mode, Shure 556S ◉ is worse than Microphone in this range ◉ , delivering equal 17 score measurement.
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Shure 556S Voice Isolation Feature
Does it have voice isolation?
No 0Votes Shure 556S
Yes Microphones in this range
Whether the mic includes isolation tech.
When it comes to Voice Isolation Feature, Shure 556S ◉ is worse than Microphone in this range ◉ .
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Shure 556S Transient Response
What is the transient response?
37 Shure 556S 0 Votes Medium
83 Microphones in this range Fast
Ability to capture sudden sound changes.
When it comes to Transient Response, Shure 556S ◉ is worse than Microphone in this range ◉ , delivering equal 46 score measurement.
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Shure 556S Proximity Effect Control
Does it have proximity effect control?
No 0Votes Shure 556S
Yes Microphones in this range
Whether it has control for bass buildup at close range.
When it comes to Proximity Effect Control, Shure 556S ◉ is worse than Microphone in this range ◉ .
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Shure 556S Output Level
What is the output level?
-64 dBV/Pa 0Votes
-41.01 dBV/Pa (Average)
The output voltage relative to input pressure.
When it comes to Output Level, Shure 556S ◉ is worse than Microphone in this range ◉ , delivering equal 23.0 dBV/Pa measurement.
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Shure 556S Transformer/Transformerless Design
What design does it use?
57 Shure 556S 0 Votes Transformer
77 Microphones in this range Transformerless
The electrical coupling approach used.
When it comes to Transformer/Transformerless Design, Shure 556S ◉ is worse than Microphone in this range ◉ , delivering equal 20 score measurement.
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Shure 556S Minimum Terminating Impedance
What is the minimum terminating impedance?
150 Ω 0Votes
787.81 Ω (Average)
The minimum load impedance required for optimal microphone performance and to avoid signal distortion.
When it comes to Minimum Terminating Impedance, Shure 556S ◉ is better than Microphone in this range ◉ , delivering higher 637.8 Ω measurement.
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Connectivity & Interfaces 10
Shure 556S Connection Interface
What is the connection interface?
17 Shure 556S 0 Votes XLR
37 Microphones in this range XLR
Defines the main interface for connectivity.
When it comes to Connection Interface, Shure 556S ◉ is worse than Microphone in this range ◉ , delivering equal 20 score measurement.
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Shure 556S Cable Detachable
Is the cable detachable?
Yes 0Votes Shure 556S
Yes Microphones in this range
Whether the cable can be detached or replaced.
When it comes to Cable Detachable, Shure 556S ◉ is better than Microphone in this range ◉ , delivering higher 50 score measurement.
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