LECTROSONICS INC SMJ68 Frequency Transmitter M170 171.905

( Brand: Lectrosonics Inc ), ( Manufacturer Part Number: SMJ68 ), ( Part Type: Transmitter )

Review LECTROSONICS INC Frequency Transmitter

The **Lectrosonics SMJ68 M170** is a high-performance, wireless microphone transmitter operating at the precise frequency of **171.905 MHz**, designed to deliver unparalleled clarity, reliability, and flexibility for professional audio applications. Part of Lectrosonics renowned **SMJ68 series**, this compact yet robust transmitter is engineered to meet the demands of live sound, broadcast, and recording environments where crystal-clear wireless transmission is essential. Built with Lectrosonics signature **DigiLink** technology, the SMJ68 M170 ensures seamless, interference-free communication by dynamically adapting to environmental conditions, maintaining signal integrity even in crowded RF spectra. Its **M170 model** is specifically optimized for **170 MHz operation**, a frequency band renowned for its long-range capabilities and minimal susceptibility to multipath interference, making it ideal for large venues, outdoor events, or applications requiring extended transmission distances.

The transmitter s **durable, rugged construction** is designed to withstand the rigors of professional use, featuring a **metal enclosure** that protects against drops, dust, and moisture, while its **compact form factor** allows for easy integration into handheld microphones, lavaliers, or in-ear monitors. With a **power output of 100 mW**, the SMJ68 M170 provides ample signal strength for reliable performance, even in challenging RF environments, while its **low power consumption** ensures extended battery life when paired with compatible receivers. The unit incorporates **Lectrosonics advanced digital modulation**, which minimizes noise and distortion, delivering a pristine audio signal with exceptional dynamic range and fidelity. Additionally, its **automatic frequency selection (AFS)** capability allows for quick and secure channel assignment, reducing setup time and ensuring compliance with regulatory requirements.

For professionals who demand the highest standards of wireless audio, the **SMJ68 M170** excels in versatility, offering **multiple mounting options**, including a **screw-in or clip-on design**, making it adaptable to a wide range of microphone systems. Its **low-profile design** ensures minimal obstruction, while its **durable connectors** guarantee reliable signal transfer. Whether used in live performances, broadcast studios, or field recordings, this transmitter delivers the **consistency and reliability** that Lectrosonics is celebrated for, making it a trusted choice for engineers, sound technicians, and content creators who refuse to compromise on audio quality. With its **long-term stability, ease of use, and industry-leading performance**, the SMJ68 M170 stands as a cornerstone of modern wireless microphone systems, ensuring that every voice whether on stage, in the field, or behind the scenes is captured with absolute precision.

The **Lectrosonics SMJ68 M170** is a professional wireless microphone transmitter operating on the 171.905 MHz frequency, commonly used in broadcast, live sound, and professional audio applications. Below is a detailed analysis of its pros and cons, followed by a conclusion and recommendation.

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### **Pros of the Lectrosonics SMJ68 M170**

1. **High Reliability and Durability**

Lectrosonics is a well-established brand in professional audio, known for building rugged and dependable wireless systems. The SMJ68 is designed to withstand demanding environments, including outdoor broadcasts, concerts, and studio work. Its robust construction reduces the risk of failure during critical performances.

2. **Excellent Audio Quality**

The transmitter delivers high-fidelity audio with minimal interference, thanks to Lectrosonics' proprietary **DigiLink** technology. This ensures clear, distortion-free transmission even in crowded frequency spectra. The system supports high-resolution audio, making it suitable for professional applications where sound integrity is paramount.

3. **Low Latency and Synchronization**

The SMJ68 is part of Lectrosonics' **DigiLink** ecosystem, which allows for precise synchronization with other wireless devices and digital audio systems. This is particularly useful in multi-camera broadcasts or live sound reinforcement where timing is critical. The system also supports **sub-millisecond latency**, which is essential for applications like voice-over work or live mixing.

4. **Wide Frequency Range and Flexibility**

Operating in the **170 MHz band**, the SMJ68 avoids interference from consumer devices (which often operate in the 2.4 GHz or 900 MHz bands). This frequency range is less congested, providing more stable and reliable performance in environments with many wireless devices. The system also supports **frequency hopping** to further reduce interference.

5. **Compatibility with Professional Ecosystems**

The SMJ68 integrates seamlessly with Lectrosonics' range of receivers, mixers, and digital audio systems. This makes it ideal for setups where multiple wireless microphones or instruments are in use. It also works well with **AVB (Audio Video Bridging)** and other professional networking protocols, allowing for advanced routing and control.

6. **Low Power Consumption**

The transmitter is designed to be energy-efficient, which is beneficial for battery-powered applications (e.g., handheld mics or lavaliers). It also reduces heat buildup, contributing to longer operational life in continuous use scenarios.

7. **Secure Transmission**

Lectrosonics systems use **encrypted communication protocols**, reducing the risk of unauthorized access or signal hijacking. This is particularly important in high-security environments like government broadcasts or corporate events.

8. **Long-Range Capability**

The SMJ68 is capable of transmitting signals over **significant distances** (typically up to several hundred meters, depending on environmental conditions and receiver placement). This makes it suitable for large venues, outdoor events, or remote broadcasting scenarios.

9. **Easy Integration with Digital Workflows**

The transmitter can be controlled and monitored via **Lectrosonics' proprietary software (e.g., DigiLink Manager)** or third-party tools, allowing for remote adjustments to frequency, gain, and other parameters. This is useful for pre-show setup and troubleshooting.

10. **Warranty and Support**

Lectrosonics offers robust **manufacturer warranties** (typically 2 3 years) and excellent customer support, including technical assistance and spare parts availability. This reduces downtime and ensures long-term usability.

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### **Cons of the Lectrosonics SMJ68 M170**

1. **High Cost**

The SMJ68 is an **expensive** professional-grade device, with prices often exceeding **$1,000 $1,500 per unit**, depending on the retailer and bundle options. This makes it less accessible for hobbyists, small-scale productions, or budget-conscious projects. The cost is justified by its reliability and performance, but it may be overkill for casual use.

2. **Limited Consumer Availability**

Unlike consumer-grade wireless mics (e.g., Shure, Sennheiser, or Rode), the SMJ68 is **not widely available in retail stores**. It is primarily sold through **professional audio distributors, rental houses, or directly from Lectrosonics**. This can make purchasing or repairs more difficult for those without industry connections.

3. **Complex Setup and Learning Curve**

The system requires familiarity with **professional audio workflows**, including frequency management, synchronization, and digital routing. Beginners may find the setup process intimidating, especially if they are not already using Lectrosonics equipment. Additional training or documentation may be needed.

4. **Dependence on Lectrosonics Ecosystem**

While the SMJ68 is versatile, its full capabilities are **best realized within a Lectrosonics system**. Mixing it with non-Lectrosonics receivers or microphones may require additional adapters or workarounds, potentially complicating the setup. Users locked into other brands (e.g., Sennheiser, Soundcraft) may face compatibility challenges.

5. **Bulk and Portability**

The SMJ68 is a **larger and heavier** device compared to consumer wireless mics. While this contributes to its durability, it can be cumbersome for handheld use or travel. Some users may prefer more compact alternatives for mobility.

6. **Licensing Requirements in Some Regions**

In certain countries (e.g., the U.S.), wireless microphones operating in specific frequency bands may require **licensing or frequency coordination** with regulatory bodies (e.g., the FCC). While the 170 MHz band is generally unlicensed in many regions, users should verify local regulations to avoid legal issues.

7. **Limited Battery Life (for Portable Use)**

While the transmitter is energy-efficient, its battery life in handheld or lavalier configurations may not match that of consumer-grade alternatives. Users relying on battery power for extended periods may need to carry spares.

8. **No Built-in Diversity Reception**

Unlike some high-end consumer or professional systems, the SMJ68 does **not** feature **diversity reception** (multiple antennas to combat signal fading). While Lectrosonics systems are highly reliable, this could be a consideration in extremely challenging RF environments (e.g., dense urban areas with many wireless devices).

9. **Software Dependency**

Some advanced features (e.g., frequency management, synchronization) require **compatible software or control interfaces**. Users without access to these tools may find certain functionalities limited or inaccessible.

10. **Resale Value and Depreciation**

Professional audio equipment, including Lectrosonics gear, tends to **depreciate over time**. While high-quality, the resale value may not recover the full purchase price after a few years, especially if newer models are released.

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### **Conclusion**

The **Lectrosonics SMJ68 M170** is a **premium wireless microphone transmitter** designed for professional audio applications where reliability, audio quality, and synchronization are critical. Its strengths lie in its **durability, low-latency performance, interference resistance, and seamless integration with professional workflows**. These attributes make it an excellent choice for **broadcast, live sound, studio recording, and high-end AV applications**.

However, its **high cost, complex setup, and ecosystem dependency** may not justify its use for **casual users, hobbyists, or budget-conscious projects**. Additionally, the lack of consumer availability and potential licensing requirements in some regions could pose challenges for certain users.

For those working in **professional environments where Lectrosonics equipment is already in use**, the SMJ68 represents a **superior investment** that will deliver consistent, high-quality performance over the long term. For others, exploring **mid-range professional alternatives** (e.g., Sennheiser G5, Shure BLX, or Rode Wireless Go II**) may offer a more balanced cost-to-performance ratio without sacrificing too much in terms of reliability.

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### **Recommendation**

- You are working in a **professional broadcast, live sound, or studio environment** where reliability and audio quality are non-negotiable.

- You are already using **Lectrosonics receivers or mixers**, and the system is part of an existing workflow.

- You require **low-latency, synchronized wireless transmission** for applications like voice-over, multi-camera production, or digital audio networks.

- Budget is not a constraint, and you prioritize **long-term durability and support**.

- You are a **hobbyist, podcaster, or small-scale content creator** on a limited budget. Mid-range professional or consumer-grade wireless mics (e.g., Sennheiser G5, Shure BLX, or Rode Wireless Go II) may suffice.

- You need **portability and ease of use** without deep technical setup requirements.

- You are working in an **environment with many wireless devices**, where a more flexible frequency-hopping system (e.g., 2.4 GHz UHF) might be preferable.

- You require **diversity reception or advanced interference mitigation**, which may not be available in the 170 MHz band.

Ultimately, the SMJ68 is a **top-tier professional tool** that excels in controlled, high-stakes environments. Its value is best realized when paired with a **compatible ecosystem and long-term use**. For most other applications, a more accessible alternative may provide similar performance

Details:

I do not have a receiver, so am unable to test it. The battery is not Included. However, I plug a battery in the light turns on when flick switch. It is ideal for use in musical instruments, live performances, and various audio recording setups, providing users with a seamless uninterrupted experience.

With the reputable brand name of Lectrosonics Inc, this model SMJ68 transmitter ensures reliable and clear sound transmission in frequency 171.905.

part #: smj68 prices

• $29.99-$149.00

specifications micwisys:

• brand: Lectrosonics Inc
• mpn: Smj68
• part type: Transmitter

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• policy: No Returns

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shipping micwisys:

• cost: $9.14
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seller micwisys:

• # reviews: 330
• rating: 100.0%
• city: Gilbert, Arizona

general micwisys:

• Musical Instruments Gear > Pro Audio Equipment > Microphones Wireless Systems
• condition: Used

offer micwisys:

• options: Ship-to-home
• started: May 17, 2026
• quantity: 1
• availability: In Stock
• sold: 0

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