The ETS SM1-ULE2 Economy Surface Mount Uni-Directional Microphone is designed for high-performance audio applications where clarity is essential. With its flush mount design and uni-directional pickup pattern, this microphone effectively minimizes side noise, making it ideal for environments with background distractions. The built-in limiter circuit ensures consistent output levels during loud sounds, while selectable lo-cut and hi-cut filters further enhance sound quality by reducing unwanted background noise. Its robust ABS enclosure allows for versatile surface mounting, ensuring simple and reliable installation.
ETS SM1-ULE2 Microphone Features
- Uni-directional Pickup Pattern: 25′ pickup pattern with reduced (-6db) sensitivity on all sides enhances audio clarity by focusing on the intended sound source.
- Low Noise Pre-Amplifiers: Equipped with low noise MOSFET pre-amplifiers to ensure high-quality sound without interference.
- High Signal-to-Noise Ratio: More than 60DB S/N ratio provides clear audio reproduction, minimizing background noise.
- High Sensitivity: Sensitivity of –45DB captures even the faintest sounds, ensuring detailed audio input.
- Wide Frequency Response: 500Hz-13Khz frequency response allows for a broad range of sounds to be captured accurately.
- Selectable Hi-Cut/Lo-Cut Filters: Jumper selectable filters limit frequency response to 900 to 6Khz, significantly reducing background noise for clearer audio.
- Volume Range Options: Jumper selectable volume ranges of “Line level” (0db) or “Microphone level” (-30db) offer flexibility for various audio setups.
- Adjustable Gain: Adjustable gain in both volume ranges provides customization for optimal audio levels.
- Internal Peak Limiter Circuit: Fast response of 0.5 seconds effectively manages loud sound intervals to prevent distortion.
- Unbalanced Output: 100 Ohm unbalanced output simplifies integration with other audio equipment.
- Fast Cable Termination: 3 position Euro-style connector allows for quick and clean cable termination.
- Power Specifications: Operates on 12V to 24VDC at 10mA, ensuring compatibility with various systems.
- On-Board Voltage Regulator: Integrated voltage regulator and RFI filtering enhance performance in challenging environments.
- Wide Temperature Range: Industrial temperature range of -40C to 105C ensures reliable operation in extreme conditions.
- Discreet Design: Similar in appearance to a fire suppression sprinkler head for unobtrusive installation.
- Versatile Mounting: ABS enclosure allows for mounting on any surface, providing flexibility in installation options.
ETS SM1-ULE2 Detailed Specifications
| Feature | Details |
| Pickup Pattern | Uni-directional, 25′ with -6db sensitivity on sides |
| Pre-Amplifier Type | Low noise MOSFET |
| S/N Ratio | More than 60DB |
| Sensitivity | -45DB |
| Frequency Response | 500Hz-13Khz |
| Hi-Cut/Lo-Cut Filters | Jumper selectable, limits response to 900 to 6Khz |
| Volume Range | “Line level” (0db) or “Microphone level” (-30db) |
| Gain | Adjustable in both volume ranges |
| Peak Limiter Circuit | Internal, 0.5 sec response |
| Output | 100 Ohm unbalanced |
| Connector Type | 3 position Euro-style |
| Power Requirements | 12V to 24VDC @ 10mA |
| Voltage Regulation | On-board voltage regulator and RFI filtering |
| Temperature Range | -40C to 105C |
| Design | Similar to fire suppression sprinkler head |
| Mounting | ABS enclosure, mounts on any surface |



















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