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Overview of subminiature design, sound quality, and application suitability for the microphones.
Methods for attaching the microphone using provided clips and brackets for optimal pickup.
Instructions for connecting the microphone cable to the preamplifier or wireless body-pack.
Guidelines for securing the SM93 preamplifier to clothing or pockets.
How to power the SM93 preamplifier using phantom power supplies.
Recommended load impedance for the SM93 preamplifier for optimal signal handling.
Guidance on connecting the microphone to non-Shure preamplifiers or body-packs.
Technical specifications including type, frequency response, polar pattern, impedance, sensitivity, and SPL.
Technical specifications for SM93, covering response, polar pattern, impedance, sensitivity, and SPL.
Detailed electronic schematic diagram for the SM93 preamplifier circuit.
List of accessories included with the WL93 and SM93 microphones.
List of optional accessories available for the WL93 and SM93 microphones.
Information regarding CE marking and compliance with European EMC directives.
The Shure WL93 and SM93 are omnidirectional condenser lavalier microphones designed for discreet, high-quality audio capture in various professional settings. These subminiature microphones are ideal for applications where visual unobtrusiveness is paramount, such as TV broadcasting, theater productions, and sound reinforcement systems. Despite their small size, they are engineered to deliver full, clear sound comparable to that of much larger microphones, making them a versatile choice for demanding audio environments.
The core function of both the WL93 and SM93 microphones is to convert acoustic energy into electrical signals with high fidelity. As electret condenser microphones, they utilize a permanently charged material to create an electrostatic field, which simplifies their power requirements compared to traditional condenser microphones. The omnidirectional polar pattern ensures uniform sensitivity to sound from all directions, making them forgiving in terms of placement and ideal for capturing ambient sound or when the sound source moves relative to the microphone. This characteristic is particularly beneficial in live performance or broadcast scenarios where precise microphone aiming might be challenging.
A key feature of these microphones is their tailored frequency response, which includes a smooth extended response with a presence rise specifically designed for chest-worn operation. This tailoring helps to enhance vocal clarity and intelligibility when the microphone is attached to clothing. Additionally, a controlled low-frequency rolloff is incorporated to reduce unwanted low-frequency noise, such as rumble from clothing movement or room ambiance, ensuring a cleaner audio signal. The microphones are designed for low distortion and a wide dynamic range, allowing them to handle a broad spectrum of sound levels without introducing unwanted artifacts.
The WL93 and SM93 differ primarily in their intended application and connectivity. The WL93 is specifically designed for wireless use and connects directly to a Shure wireless body-pack transmitter. This makes it a convenient option for performers, presenters, or anyone requiring freedom of movement without being tethered by cables. The SM93, on the other hand, is intended for wired applications and includes a preamplifier assembly. This preamplifier facilitates connection to standard three-pin professional (XLR) audio connectors, making it compatible with a wide range of mixing consoles and audio interfaces. The SM93 requires phantom power, operating over a broad range of 11 to 52 Vdc, which covers both DIN and IEC phantom power standards, ensuring compatibility with most professional audio equipment.
The design of the WL93 and SM93 prioritizes ease of use and discreet placement. Their subminiature size and inconspicuous mounting hardware allow them to be hidden effectively on talent or instruments.
For mounting the microphone, several options are provided:
Mounting the SM93 preamplifier is also designed for convenience. A spring-loaded belt clip allows the preamplifier to be attached to a belt, skirt, trouser waistband, or even placed inside a pocket. This keeps the preamplifier secure and out of sight while ensuring a stable connection to the wired audio system.
To enhance audio quality in outdoor or windy conditions, an acoustic foam windscreen is supplied. This windscreen helps to reduce undesirable wind noise, ensuring clear audio capture even in challenging environments.
For wired applications with the SM93, the preamplifier requires phantom power. It is compatible with any phantom supply providing 11 to 52 Vdc, including dedicated power supplies like the Shure Model PS1A. When connecting the SM93 to a mixer, it is crucial to use the supplied preamplifier to ensure proper operation and signal conditioning. Similarly, the WL93 must be connected to a Shure wireless body-pack. Direct connection of either microphone to a mixer without the appropriate preamplifier or body-pack is not recommended.
When using the SM93 preamplifier, it is important to consider the load impedance. A minimum load impedance of 800 Ω or greater is recommended for maximum signal handling and minimum distortion. While loads as low as 150 Ω can be used, this may result in a reduction in the output clipping level.
For users who wish to connect the 93 microphone to preamplifiers or body-packs other than those supplied by Shure, it is essential to ensure that the alternative device provides a regulated +5 Vdc source (with a minimum of 40 µA) at pin 2 of the microphone connector, following the specified microphone wiring diagram. This ensures proper power delivery and signal integrity.
The WL93 and SM93 microphones are designed for durability and reliable performance with minimal maintenance. The housing of the microphone element is constructed from black ABS thermoplastic, providing a robust yet lightweight enclosure. A stainless-steel-mesh grille protects the microphone capsule from physical damage and helps to maintain consistent acoustic performance.
The SM93 preamplifier features a steel case with a non-reflective black finish and a black-chrome belt clip, ensuring both durability and a professional appearance.
Routine maintenance primarily involves keeping the microphone and its accessories clean and protected. The supplied windscreens can be replaced if they become worn or damaged, helping to maintain optimal performance in terms of wind noise reduction. Replacement windscreens and mounting hardware are available, ensuring that users can easily refresh their microphone setup as needed. For example, black foam windscreens and single mount tie-clips are available in multiples, allowing for convenient replacement. Double mount tie clips are also available for the SM93 and WL93 models.
The robust construction of both the microphone and preamplifier ensures longevity, even with regular professional use. The design focuses on reliable operation, reducing the need for frequent repairs or complex servicing. Should any issues arise, the modular nature of the accessories allows for easy replacement of individual components, such as tie clips or windscreens, rather than requiring replacement of the entire unit.
General| Device interface | - |
|---|---|
| Connectivity technology | Wired |
| Product color | Black |
| Number of products included | 1 pc(s) |
| Type | Interview microphone |
| Microphone frequency | 50 - 20000 Hz |
| Microphone direction type | Omnidirectional |
| Microphone Total Harmonic Distortion (THD) | 1 % |
| Output impedance | 3000 Ω |
| Signal-to-Noise Ratio (SNR) | 94 dB |
Weight and Dimensions| Microphone weight | 16 g |
|---|
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