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Shure UNIDYNE III 545SD-LC Dual Impedance Unidirectional Microphone  

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1274034494368
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The UNIDYNE III Model 545SD is a dual-impedance, unidirectional, dynamic microphone. Shipped connected for low-impedance operation, the mic features a silent magnetic reed on/off switch. The UNIDYNE I... Read More

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Overview

The UNIDYNE III Model 545SD is a dual-impedance, unidirectional, dynamic microphone. Shipped connected for low-impedance operation, the mic features a silent magnetic reed on/off switch. The UNIDYNE III is a favorite for instrument pickup and recording, and can be used on lecterns for public address systems such as those used in political conventions and legislatures, convention halls, hotels, public auditoriums, stadiums, schools, and churches. (545SD-LC Cable not included).

Features
  • Exceptionally uniform cardioid pattern minimizes feedback in PA applications
  • Selectable dual-impedance operation
  • Silent magnetic reed on/off switch with lock option
  • Cardioid dynamic
  • Frequency response 50 to 15,000 Hz
Specifications
  • Type: Dynamic
    Frequency Response: 50 to 15,000 Hz
    Polar Pattern: Cardioid (unidirectional)--uniform with frequency, symmetrical about axis
    Impedance: Dual. Microphone rating impedance is 150 ohms (250 ohms actual) for connection to microphone inputs rated at 19 to 300 ohms and "High" for connection to high-impedance microphone inputs. Wired for low impedance as supplied.
    Output Level (at 1,000 Hz): Open Circuit Voltage*: Low: -58.0 dB (1.3 mV); High: -35.0 dB (17.6 mV)*0 dB = 1 volt per Pascal (1 Pa = 94 dB SPL)
    Polarity: Positive pressure on diaphragm produces positive voltage on pin 2 (with respect to pin 3).
    Switch: Built-in magnetic reed on/off switch with lockplate.
    Cartridge Shock Mount: Internal rubber vibration-isolator
    Swivel Adapter: Positive action, adjustable through 90 degrees from vertical to horizontal, permits easy removal for handheld use, suitable for mounting on stand with 5/8"- 27 thread
    Case: Chrome-plated die casting with ARMO-DUR grille and stainless steel screen
    Dimensions (Length x Diameter): 6-3/16" x 1-1/4" (157 x 32 mm)
    Net Weight (less cable): 9 oz (255 grams)
Warranty
MANUFACTURER'S WARRANTY
One year warranty on wireless mics, mixers, and circuitry products.
2 year warranty on wired mics.
Warranty terms vary. Check with manufacturer for specific product warranty.


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Review Snapshot

by PowerReviews
ShureUNIDYNE III 545SD-LC Dual Impedance Unidirectional Microphone
 
5.0

(based on 3 reviews)

Ratings Distribution

  • 5 Stars

     

    (3)

  • 4 Stars

     

    (0)

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  • 1 Stars

     

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Reviewed by 3 customers

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5.0

Good for just about everything.

By Kit

from Fresno, Ca

About Me Experienced

Pros

  • Durable
  • Easy To Use
  • Versatile

Cons

    Best Uses

      Comments about Shure UNIDYNE III 545SD-LC Dual Impedance Unidirectional Microphone:

      The versatility of this mic is astounding. I was torn between this and an SM57 for use as a harmonica mic. With a 57, I would need an impedance transformer, since I'm going straight into a guitar amp. The pro sound tech at Guitar Center suggested this one, because he said the high end resnponce was better. The fact that it switches to high impedance was just a bonus. I'm blown away. Not only is the sound great, but depending on distance, gain, and how the mic is handled, there's a whole range of tones this mic is capable of. By the way, switching the mic from low to high impedance was VERY simple, and only took about a minute, beginning to end, thanks to the clear instructions that came with it.

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      (1 of 3 customers found this review helpful)

       
      5.0

      Great mic

      By Greg

      from Granby ct

      Comments about Shure UNIDYNE III 545SD-LC Dual Impedance Unidirectional Microphone:

      I am using this for harmonica and it has great tone. This is my first mic so I am no expert but I love it and am not disappointed.

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      (1 of 1 customers found this review helpful)

       
      5.0

      Great harp mic

      By gc

      from granby ct

      Comments about Shure UNIDYNE III 545SD-LC Dual Impedance Unidirectional Microphone:

      This is my first mic for harmonica but I have to say that it does crunch up great when cupped. I am starting to get the hang of it and there are a lot of different tones you can get by the different ways of cupping this mic. I am using it thru a vox ac4tv amp and it sounds good to my ears.I swapped in an amperex 12au7 in the amp and feedback is no problem.

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      Displaying reviews 1-3

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