Pricing and availability
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Price
Average Price: $127
Standard/Professional
$75
$201+
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Budget
Standard
High-end
Price History
Based on price data from 3 merchants for "Shure Unidyne III 545". Prices shown reflect NEW condition. Tracking began Apr 2, 2026.
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Description
The Shure Unidyne III 545 is a classic reborn, offering a nod to the legendary SM57 while retaining its unique vintage charm. This dynamic microphone is revered for its versatility, making it an essential tool for both studio recording and live sound applications. Its dual-impedance operation allows for seamless adaptability, whether you're capturing the nuances of an acoustic guitar or delivering a speech on a lectern. The uniform cardioid polar pattern provides effective feedback resistance, ensuring crisp and clear sound reproduction.
A standout feature is the silent magnetic reed on/off switch, designed with a lock option for uninterrupted performance. The 545's durability and reliability make it a staple in any professional audio setup, from political conventions to bustling music venues. Whether you're a seasoned audio engineer or an aspiring musician, the Shure Unidyne III 545 offers a sound solution with a rich history and a proven track record.
Key Features:
- Dual-impedance operation for versatile use
- Uniform cardioid polar pattern for feedback resistance
- Silent magnetic reed on/off switch with lock option
- Frequency response: 50Hz–15kHz
- Ideal for instrument capture and public address systems
Product specs
| Brand | Shure |
| Model | 545S Unidyne III |
| Finish | Silver / Black |
| Year | 1970s |
| Made In | United States |
| Categories | Microphones |
| Electronics | Analog, Solid State |
| Microphone Type | Dynamic |
| Polar Pattern | Cardioid |
| Wired/Wireless | Wired |
FAQs
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What is the primary application of the Shure Unidyne III 545 microphone?
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The Shure Unidyne III 545 is primarily used for live sound reinforcement and studio recording, offering a cardioid polar pattern that effectively minimizes feedback in public address applications.
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How does the Shure Unidyne III 545 handle feedback in live performances?
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The Shure Unidyne III 545 features an exceptionally uniform cardioid pattern that minimizes feedback, making it ideal for live performances and PA applications.
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Can the Shure Unidyne III 545 be used with different impedance setups?
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Yes, the Shure Unidyne III 545 offers selectable dual-impedance operation, allowing it to be compatible with a variety of audio equipment setups.
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Does the Shure Unidyne III 545 have an on/off switch?
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Yes, the Shure Unidyne III 545 includes a silent magnetic reed on/off switch with a lock option for added convenience and control during performances.
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What is the frequency response range of the Shure Unidyne III 545?
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The Shure Unidyne III 545 has a frequency response range of 50 to 15,000 Hz, providing a wide range of sound capture suitable for various vocal and instrumental applications.
Videos
Cole Picks Vintage
Shure Vintage Dynamic Microphone Shootout (SM7, SM5B, SM56, 546, 545, SM57, 548)
Shure Vintage Dynamic Microphone Shootout (SM7, SM5B, SM56, 546, 545, SM57, 548)
Cole Picks Vintage
SM57 vs 545 - Vintage vs New
MEI Studio
Reviews
Owner Insights
We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about Shure Unidyne III 545.
Comparisons
Value and pricing
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It's noted that vintage Shure 545s aren't worth twice the price of reissues due to the consistent quality across old Shure mics.
Source
Use cases and applications
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The Unidyne III 545D is favored for recording drums, though specific user comparisons to the SM57 in this context are sought for clarity.
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The 545S excels on snare and guitar, and is versatile enough for general use, though it is not extensively tested across all instruments.
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Ideal for high-quality theater-stage sound systems, political events, and large public venues, the 545S suits critical public address needs.
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A damaged Unidyne III can be repurposed for educational purposes, allowing for hands-on learning without the risk of damaging a working unit.
Source
User experience
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Owners appreciate the aesthetic appeal of the 545S, describing it as "awesome looking," which adds to its desirability alongside its sound quality.
Source
Setup and maintenance
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Repairing a damaged Unidyne III might cost $150-$200 through specialized vintage mic repair services, but could be worthwhile given their current market value of around $300.
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Replacing the foam in the grill might not resolve sound quality issues; issues may stem from the capsule itself, suggesting more in-depth repairs are needed.
Source
5.0 out of 5
Based on 0 Reviews and 1 Rating
Artist usage
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Used live as a vocal mic, as is visible in this May 1968 photo of Hendrix.
Jimi Hendrix At The Palazzo dello Sport, Bologna, Italy, May 26th,1968 Second European Tour
In this clip Jeff Lynne is using vintage Shure Unidyne III
Visible in this photo of Coltrane mid-recording session. The likelihood that it is a 545 is supported by this comment by Coltrane frequent producer, Rugy Van Gelder, in this article:
I don't think really there's been much progress since the U47 and the Shure 545. What has happened?
Visible in this photo of Brown at the Apollo Theater.
For his amp rig, we stuck with his live setup which sounded great. It’s a dual amp rig consisting of a Roland JC50 for the mids and G&K for the low end. The bass in this band is the raw texture in the music, so it takes the place of a guitar player essentially. So to capture that raw midrange, we used a combination of a Shure SM57, Unidyne 546, and an EV 408.
Visible in this photo of Stratos, as well as this one and the cover of Concerto all'Elfo.
Album Usage
The Shure Unidyne III 545 has been featured on the following albums:
Genre Usage
Based on how artists on Equipboard use this gear, it is most commonly found in the following genres.
Used With
Based on how musicians on Equipboard use Shure Unidyne III 545, it is most commonly used with the following gear.
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