Shidu Voice Amplifier Battle: M800 vs S278 vs S611 — A Comprehensive Comparison Guide for Teachers

As an educator, you understand the power of your voice. It’s your instrument of instruction, your tool for connecting with students, and your megaphone for leading schoolwide events. But if you struggle with vocal projection and clarity, a voice amplifier could be your saving grace. And when it comes to quality amplifiers designed with teachers in mind, shidu voice amplifier is a brand worth exploring. In this detailed review, we’ll take a closer look at three of their top-rated models: the M800, the S278, and the S611. From compact size to long battery life to crystal-clear sound, each one has something unique to offer.

Shidu voice amplifier comparison

Looking for a voice amplifier that is easy to use, portable, and perfect for classrooms of all sizes? Look no further than the Shidu line of voice amplifiers! Shidu is an expert in crafting top-notch voice amplifiers for dedicated educators. Their extraordinary design is not only feather-light but also mighty.

The M800 is compact and lightweight, making it a great choice for small to medium-sized classrooms. Plus, it features Bluetooth connectivity, so teachers can play music or other audio right from their mobile devices. Need something a little more powerful? The S278 is designed for larger classrooms and outdoor activities, and boasts both Bluetooth connectivity and a built-in FM radio and voice recording function. And for the biggest outdoor spaces, the S611 is the way to go. With Bluetooth connectivity, an FM radio, and a voice recording function, plus a removable microphone and waistband for easy portability, the S611 is the ultimate voice amplifier choice.

In our comprehensive guide, we dive into the world of Shidu voice amplifiers, dissecting their features, sound quality, and ease of use. Through our thorough analysis, you’ll be equipped with the knowledge to confidently select the perfect model for your teaching needs. Let’s explore the world of Shidu together and discover the amplifier that will amplify your voice and your students’ learning experience:

Our Shidu Voice Amplifier Comparison
Shidu Voice Amplifier M800
Shidu S278 Voice Amplifier
Shidu S611 Voice Amplifier
Shidu Voice Amplifier M800 vs S278 vs S611

Shidu Voice Amplifier M800

Teachers looking for a reliable, powerful audio device need look no further than the Shidu original voice amplifier M800. This specially designed model provides optimal performance with its high-quality output and comfortable microphone headset, plus Bluetooth connectivity makes it versatile enough to use in any setting. Investing in this powerhouse voice amplifier is sure to be an excellent decision – one that teachers will benefit from time after time!

Shidu voice amplifier m800
The Shidu Voice Amplifier M800 is a compact and lightweight model, designed for ease of use and portability

Description of the Shidu Voice Amplifier M800’s Features and Specifications

Introducing the Shidu M800, your go-to device for all your audio needs. This portable and waterproof Bluetooth voice amplifier packs a punch with its 18W output power, delivering clear and crisp audio every time. Equipped with a comfortable and adjustable wired microphone headset, you can wear it for hours without experiencing any discomfort. It’s compatible with any Bluetooth-enabled device, so you can easily play your favorite audio files or music. Plus, with a battery capacity of 3.7V and 4400mAh, you can enjoy 10-12 hours of uninterrupted audio playtime, no matter where you are. Charge time is also quick and easy, with only 3-5 hours required. Take your audio to the next level with the Shidu M800.

In this video, we’ll take a closer look at this powerful device and give you a detailed review. From enhancing your public speaking to blasting your favorite tunes, the Shidu M800 is the perfect tool for any occasion. Discover its impressive features, sleek design, and crystal-clear sound quality:

Shidu Voice Amplifier M800
Output power18 W
Battery capacity3.7 V, 4400 mAh
Charging voltage5 V, 1 A
Charging time3-5 hours
Working time10-12 hours (depending on volume control)
Microphone headsetAdjustable and comfortable wired headset
Bluetooth connectivityQuick and easy pairing with Bluetooth-enabled devices
UsagePerfect for outdoor use, teachers, vocals, coaches, presentations, fitness trainers, yoga, elderly, tour guides, or people with gentle voice and Parkinson’s

Pros and Cons of Using M800 Shidu in the Classroom


  • Powerful audio output: The Shidu voice amplifier M800 audio system is a game-changer for classroom communication. Its robust audio capabilities allow for clear and powerful sound projection, ensuring that all students, even those in the back of the classroom, can fully engage in the lesson. With the M800, there is no need to strain to hear the teacher or miss out on important information. This cutting-edge technology takes classroom communication to the next level, providing a seamless and immersive learning experience for students and teachers alike.
  • Bluetooth connectivity: Experience seamless audio playback with a touch of technology. From musical melodies to captivating lectures, the Bluetooth connectivity of this device will blow you away. Let your audio files roam free and watch as they seamlessly stream to create an unforgettable auditory experience.
  • Design: Introducing a cutting-edge sound system that’s both waterproof and portable, making it the ideal solution for your outdoor adventures, field trips, and any other setting where traditional speakers just won’t cut it. Enjoy crystal-clear audio wherever you go thanks to this innovative and versatile device. Don’t let a lack of practical sound equipment hold you back – this one-of-a-kind system has got you covered!


  • Price: The M800 voice amplifier may seem like a splurge for some educators, especially those penny-pinching pinchers. However, it’s worth considering that the price tag is a reflection of the exceptional quality, durability, and features that come bundled alongside. So, if you’re looking to make a long-term investment in your teaching equipment, the M800 might be the upgrade that you’ve been seeking all along.
  • Battery life: As a professional working in education, it’s important to have a device that can keep up with your demanding schedule. Unfortunately, some devices fall short when it comes to battery life, which can be a major headache for teachers who require longer working hours. Don’t let a dead battery interrupt your productivity – consider investing in a device with a longer battery life, and stay focused on the important work you do every day.

User Reviews for the Original Voice Amplifier Shidu M800

As per feedback from satisfied customers, the Shidu M800 is a top-notch voice amplifier that delivers premium sound quality, making it the ideal choice for educators and professionals who require vocal projection in diverse environments. Its lightweight and water-resistant build allows for easy portability, proving suitable for outdoor engagements.

Very impressed with day 1 of using this bit of kit. I’m a swimming teacher that has vocally suffered for years but after using this for 5hrs of teaching on poolside I noticed a huge difference in the usual discomfort. ? it has a long life span!

— Natalie, September 12, 2020

Although some users expressed reservations regarding its battery capacity, most were immensely impressed with the device’s effectiveness as a whole.

This was the third voice amplifier that we bought, and it actually held a charge. Two other voice amplifiers did not work properly and had to be returned. So, we are thankful that this one actually works!

— Desiree Slavick. April 11, 2022

Shidu S278 Voice Amplifier

Introducing the Shidu S278: the ultimate portable voice amplifier for teachers, fitness trainers, and travel guides alike. With its state-of-the-art technology, it delivers unparalleled voice clarity and natural sound coverage over an impressive 10000 sq.ft. Perfect for making announcements, holding group discussions, or delivering lessons with ease. We’ll delve into the S278’s unique features and specifications, compare it to the M800, and weigh up the pros and cons for classroom use. Get ready to amplify your voice, and captivate any audience, with the powerful Shidu S278.

Shidu S278
The S278 is designed for larger classrooms and outdoor activities

Description of the Shidu s278 Voice Amplifier Features and Specifications

Shidu S278 is a powerful 15W voice amplifier that’s perfect for any situation! The included wired headset with a microphone allows for excellent amplification, giving you crystal-clear sound anywhere you go. Whether you need to speak to a small group or a large audience, the S278 is incredibly easy to set up and use. And with a range of volume control options, you can customize your experience to fit your needs perfectly. Crafted from durable and fashionable ABS material, this portable microphone is sure to become your go-to for all of your speaking engagements.

Not only is the S278 a top-of-the-line voice amplifier, it’s also a versatile entertainer. You can connect your phone via Bluetooth or tune in to your favorite FM station. And if you need to take a break from the mic, you can simply play music from an AUX input, TF card, or U disk. Plus, with up to 12 hours of battery life in MIC mode and 8 hours in music mode, you can keep the party going all day (or night) long. And don’t worry about transportation either- this lightweight and portable device is perfect for taking with you wherever you need to amplify your voice, or your mood.

Discover the remarkable Shidu Bluetooth Voice Amplifier with Microphone SD5278 in this informative video review. Unleash your voice and captivate your audience with this cutting-edge, portable device.

Original Voice Amplifier Shidu S278
Output power15W
Battery capacity2200mAh
Charging voltageDC 5V 500mA
Charging time3-5 hours
Working time8-12 hours (MIC mode), 6-8 hours (music mode)
Microphone headsetWired headset with microphone
Bluetooth connectivityYes
UsageIdeal for teachers, fitness trainers, travel guides and more. Sound coverage up to 10000 sq.ft. Can be used for a presentation in a small/medium room for a group of 20-65 people. Supports Bluetooth, FM radio, AUX input, TF card, U disk and recording function. Can be used as an external speaker. Portable & lightweight. Made of durable and wear-resistant ABS material. Comes with waistband and AUX cable.

Comparison of the Shidu S278 to the M800 Shidu Voice Amplifier

As an educator, ensuring that your students can hear you loud and clear is a must. Thankfully, the Shidu brand is here to deliver high-quality voice amplifiers that you can trust. If you’re in the market for a voice amplifier, two models worth checking out are the S278 and M800. In this comprehensive guide, we’ll put the spotlight on the Shidu S278 and give you an in-depth comparison against its counterpart.

  1. Output Power: The Shidu M800 has a higher output power of 18W, while the S278 has a slightly lower output power of 15W. This means that the M800 can produce a louder and clearer sound, which is ideal for outdoor activities or large classrooms.
  2. Battery Capacity: The M800 has a higher battery capacity of 3.7 V, 4400 mAh, compared to the S278’s 2200mAh battery capacity. This means that the M800 can last up to 10-12 hours depending on volume control, while the S278 can last up to 8-12 hours in MIC mode or 6-8 hours in music mode.
  3. Charging Time: Both models have the same charging time of 3-5 hours, which is relatively fast.
  4. Microphone Headset: Both the M800 and S278 come with a wired headset that is adjustable and comfortable to wear. However, the M800’s headset has a more ergonomic design, making it more comfortable for prolonged use.
  5. Bluetooth Connectivity: Both models have Bluetooth connectivity, which allows you to connect to your phone or tablet and play music or take calls. However, the M800 has a quick and easy pairing feature, making it more convenient to use.
  6. Usage: Both the M800 and S278 are ideal for teachers, fitness trainers, and tour guides. However, the M800 is better suited for outdoor use and large classrooms, while the S278 is ideal for indoor use and smaller groups.

Pros and Cons of Using Shidu S278 in the Classroom

There are a number of pros and cons to consider when using the Shidu S278 in the classroom:


  • Design: The S278 is the ultimate travel companion, designed to make your adventures simple and hassle-free. This compact device is smaller than your average smartphone, making it easy to slip into your pocket or bag without adding any extra weight. Whether you’re exploring a new city or hiking in the wilderness, the S278 is a reliable and convenient tool to help you navigate your way.
  • Wired headset: Teaching can be a juggling act, and a wired headset with a microphone can help lesson the burden. By using this handy tool, educators can keep their hands free to gesture and use instructional aids while communicating clearly to their entire classroom. Plus, with the ability to interact with students, learning becomes more engaging and interactive.
  • Entertainment functions: The S278 is a must-have tool for every classroom looking to take education to the next level. Its multimedia features are designed to make learning more fun, engaging and interactive. Whether it’s presenting a thrilling video, showcasing educational games or providing high-quality audio, this device has got you covered!
  • Voice sound: The S278 revolutionizes voice sound coverage by providing a crisp, pristine, and incredibly natural audio experience extending up to a colossal 10,000 square feet! Its cutting-edge technology offers unbeatable clarity and ensures that every word is heard and understood, making it a game-changer for any large-scale events or presentations.


  • Output power: The S278 amplifier packs a respectable 15W, but it might not cut it in larger classroom settings or outdoor environments where sound needs to travel farther.
  • Charger: As the S278 hits the market, there’s a small catch – no charger included. While this can be a bit of an inconvenience, it does open the door for you to pick out the perfect charger that suits your needs.
  • User manual: The available user manual is solely in English, which could pose a disadvantage for instructors who are not proficient in the language.

User reviews for S278 Shidu Original Voice Amplifier

The S278 headphone is getting rave reviews from users! Educators especially love that it keeps their hands free during presentations. With a wide range of entertainment functions, this headphone turns any classroom into a fun and interactive learning environment. It’s no wonder people can’t stop talking about it!

about the item:
I’m a K-5 Teacher. I use this speaker everyday for about 7hours, it charges full in 1 hour. my classroom is a normal size with 20-25 students. They can hear me loud and clear. Some of them are ADD and ADHD and this device helps improve their attention towards me. I strongly recommend it.

— Gustavo Montero, December 8, 2018

The S278 has received mixed feedback from users. While some find its 15W power inadequate for certain settings like larger classrooms or outdoor environments, others have pointed out the minor inconvenience of its missing charger. It seems that the device’s utility may depend on the specific situation it’s used in.

I may have to get use to it . Has a “tinny” sound.For the price it is okay.

— MSJ, August 24, 2019

Shidu S611 Voice Amplifier

The original voice amplifier Shidu S611 is a fantastic tool that has won the hearts of many public speakers and educators. With its advanced features and capabilities, it is not just a gadget, but an indispensable device. It provides clear and powerful sound amplification that ensures your message is communicated effectively to your audience. Its robust battery life and lightweight design make it easy to carry around, and it can be operated with ease.

Shidu S611
The Shidu S611 Voice Amplifier is a popular choice among teachers and public speakers

Description of the Shidu S611 Voice Amplifier Features and Specifications

With a powerful output of 10W and a battery capacity of 2000mAh, the Shidu S611 Voice Amplifier is a reliable choice for amplifying voices of all kinds. Its frequency response of 90Hz-18KHz ensures that all voices are adaptable to its sound system. In addition, it has a working time of 12-15 hours in MIC mode, 8-10 hours in musical mode, and 4-5 hours in microphone mode, making it a versatile option for different voice amplification needs. The charging time is fast and efficient, with the microphone taking only 2-4 hours and the voice amplifier charging in 3-5 hours. Last but not the least, the sound coverage of 5000sq.ft ensures that it is an ideal device to be used in larger classrooms or auditoriums.

Watch Shidu 611 Voice Amplifier in action in this captivating video. See how this ingenious product can enhance your vocal presence and improve your communication capabilities with ease. Discover the power of crystal-clear sound and effortless portability as the SHIDU 611 takes center stage.

Original Voice Amplifier Shidu S611
Output power10W
Battery capacity2000mAh
Charging voltageDC5V, 500mA
Charging time3-5 hours for voice amplifier; 2-4 hours for microphone
Working time12-15 hours (MIC mode); 8-10 hours (musical mode); 4-5 hours (Microphone) (It’s up to the volume you control)
Microphone headsetUHF wireless microphone
Bluetooth connectivityNo
UsageIdeal for teachers, coaches, presenters, trainers, and tour guides. Covers an area of up to 5000 sq.ft. Can be used for presentations, lectures, speeches, or any situation where voice amplification is needed. Portable and lightweight.

Comparison of the Shidu S611 to Shidu S278 and to Shidu M800

As a teacher, your voice is your most valuable tool. That’s why you need the best voice amplification device on the market. Look no further than the Shidu Voice Amplifier Battle! With three great options to choose from, the Shidu M800, S278, and S611, you’re sure to find the perfect fit for your teaching style. But let’s take a closer look at the Shidu S611 and see how it outperforms the competition. Get ready to elevate your voice and take your teaching to the next level.

  1. Output Power: The Shidu S611 has a maximum output power of 10W, which is less than both the M800 and the S278. However, it is still powerful enough to cover an area of up to 5000 sq.ft, making it a great choice for teachers who work in larger classrooms or outdoor settings.
  2. Battery Capacity: The S611 has a 2000mAh battery capacity, which is slightly lower than the S278’s 2200mAh and significantly lower than the M800’s 4400mAh. However, it can still provide up to 12-15 hours of working time in MIC mode and up to 8-10 hours in musical mode, depending on the volume control.
  3. Charging Time: The charging time for the S611 is 3-5 hours for the voice amplifier and 2-4 hours for the microphone, which is similar to the other models.
  4. Microphone Headset: The S611 comes with a UHF wireless microphone headset, which is a big improvement over the wired headset included with the S278. However, it doesn’t have the adjustable and comfortable wired headset that comes with the M800.
  5. Bluetooth Connectivity: Unlike the S278 and the M800, the S611 doesn’t have Bluetooth connectivity. This means that you won’t be able to pair it with your phone or other Bluetooth-enabled devices. However, it’s still a great option if you don’t need this feature.
  6. Usage: The S611 is ideal for teachers, coaches, presenters, trainers, and tour guides who need a portable and lightweight device that can amplify their voice. It’s also a great option for anyone who needs to cover a large area, as it can provide clear sound up to 5000 sq.ft.

Pros and Cons of Using the Shidu S611 Voice Amplifier in the Classroom

There are a number of pros and cons to consider when using the Shidu S611in the classroom:


  • Portable design: A sleek and lightweight option that can be comfortably worn around your waist. Enjoy the freedom to move around your classroom or auditorium without sacrificing the clarity and volume of your voice. Say goodbye to the inconvenience of bulky equipment and hello to a more seamless and enjoyable presentation experience.
  • Wireless mic: The wireless mic unlocks a whole new level of freedom and versatility for public speaking and presentations. No longer tethered to a cord, you can confidently move about the stage or room with ease, engaging your audience and enhancing your performance. Say goodbye to awkward lulls while you adjust your position, and hello to seamless transitions and an unbeatable delivery.
  • Battery: The advanced S611 device boasts an impressive battery life that can keep it going for up to 15 hours in MIC mode, making it a top choice for extended events and presentations that require long stretches of uninterrupted performance. So, you can concentrate on delivering your content without worrying about running out of power at critical moments.
  • Sound coverage: Experience flawless sound quality in expansive lecture halls and auditoriums with a sound coverage of an impressive 5000sq.ft. Give your audience the gift of crystal clear audio, making sure that every single person can hear you loud and clear. Say goodbye to the limitations of small speakers and embrace the power of a system that truly fills the space.


  • Charger: Educators utilizing the S611 will require an additional component to power the device, as the package does not include a charging unit. It is necessary to procure a separate charger to ensure seamless usage of the tool in the classroom.
  • Interference: Your message may be interrupted by unwanted static and noise if you use a wireless microphone. We’ve received feedback from some users who have experienced interference during presentations or lessons. Don’t let technical difficulties ruin your message – it’s time to consider a more reliable audio solution.

User Reviews for Original Voice Amplifier Shidu S611

The Shidu S611 Voice Amplifier has become a go-to gadget for teachers and public speakers alike. It boasts exceptional battery life and sound amplification, perfect for filling even the largest of rooms.

Great for my classes so I do not have to throw my voice. Very clear and helps my throat by the end of week.

— Hilaryanne, July 14, 2018

Nevertheless, a few users have noted problems with the wireless microphone and the battery, which is something to keep in mind before making a purchase.

The first one I received was loud and worked beautifully for my music classes over loud and boisterous ensembles for the first week. After a week, the speaker began randomly turning off and refusing to accept a charge.

— Widge, April 1, 2022

Summary and Recommendations

As we wrap up our analysis, it’s worth highlighting the standout features of each Shidu voice amplifier model. We’ve thoroughly examined these audio devices, and the results are in! With its powerful output and ultra-lightweight design, the S611 model is a top contender. However, it’s important to note that each of the three Shidu amplifiers offers its own unique benefits, so choosing the perfect model ultimately comes down to your specific needs and preferences.

Shidu voice amplifier summary
Each of these devices has its own unique features and specifications

The Shidu S611

Introducing the Shidu S611 – the ultimate companion for presenters, teachers, and coaches on the go. With its 10W output power and UHF wireless microphone headset, this compact and lightweight device will revolutionize your speaking experience. Whether you’re leading a tour or giving a lecture, the S611 covers an impressive area of up to 5000 sq.ft. And thanks to its 2000mAh battery capacity, you can speak for an incredible 12-15 hours in MIC mode without worrying about running out of juice. Don’t let its small size fool you – the Shidu S611 packs a punch that’s perfect for amplifying your voice wherever you go. The only thing missing? Bluetooth connectivity, but with everything else this device has to offer, you won’t even miss it.

The Shidu Voice Amplifier M800

Introducing the Shidu M800, a powerhouse portable speaker that’s perfect for all your outdoor needs! With a massive output power of 18W and a whopping capacity of 3.7 V, 4400 mAh battery, you can listen to your music or give presentations for up to 12 hours without any interruptions. The M800 comes with a comfortable, adjustable headset and a Bluetooth connection for hassle-free pairing with any Bluetooth-enabled device. You’ll be amazed at how easy it is to use this speaker, whether you’re a fitness trainer, yoga enthusiast, tour guide, or someone with a gentle voice or Parkinson’s. It’s ideal for teachers, coaches, and vocal presentations too!

The Shidu S278

Introducing the Shidu S278, a powerful and durable speaker with an impressive 15W output power and 2200mAh battery capacity. With a working time of up to 12 hours in MIC mode and 8 hours in music mode, this speaker is perfect for a variety of settings. It comes equipped with a wired headset featuring a top-notch microphone for ultimate sound quality and also offers Bluetooth connectivity. The S278 is capable of providing sound coverage for up to 10,000 sq.ft and supports various functions such as FM radio, AUX input, TF card, U disk, and recording function. Its sturdy and wear-resistant ABS material ensures that this speaker is built to last. From fitness trainers to travel guides, the S278 is the perfect tool for anyone who needs reliable sound support.

Our Recommendation Based on the Following Factors

  • For smaller classrooms and indoor use: Consider the Shidu S611 – a powerful option that boasts a coverage area of up to 5000 sq.ft, perfect for smaller settings. With an extended working time in MIC mode, you can rely on this system to keep the sound flowing all day long. Upgrade your audio experience with the Shidu S611.
  • For larger classrooms and outdoor use: The Shidu M800 has impressive output power and long-lasting battery life, this megaphone is the perfect choice for any gathering, whether it’s a school assembly or a community event. Say goodbye to the hassle of worrying about whether your voice will carry in a crowded or noisy space – with the Shidu M800, you can speak confidently and make sure your message is heard by everyone.
  • For those who require versatile features: For the tech-savvy individual seeking an audio solution with boundless capabilities, the Shidu S278 is a top-rated contender. This audio powerhouse boasts Bluetooth connectivity, an FM radio tuner, AUX input, the ability to use both TF cards and U disks, and even a recording function. Say goodbye to the confines of limited audio options and embrace the versatility of the Shidu S278.

You can see even more models and alternatives in our video, in which we take apart the 9 best vocal amplifiers for teachers.

3 Helpful Services for More Information

Expanding beyond just a mere comparison guide, there are several invaluable resources accessible to educators looking to become Shidu voice amplifier experts. With a range of helpful tools and services available, it’s easier than ever to familiarize oneself with the product line and discover strategies for maximizing its potential in the classroom.

  1. Amazon — Discover first-hand experiences of Shidu voice amplifiers from teachers around the world with the help of online resources. Websites such as Amazon are excellent platforms for reading honest feedback and ratings on these products. You can gain valuable insights into the unique features and shortcomings of each model, as well as pro-tips for optimizing your device.
  2. YouTube — Gain mastery over your Shidu voice amplifier with instructional videos and tutorials. Save time and avoid confusion with step-by-step guides, how-tos, and best practices. These videos are easily accessible on YouTube and cater to all levels of users, from beginners to experienced professionals. Get the most out of your Shidu device with these invaluable resources – fix common problems, set up your amplifier with ease, and learn new tips and tricks to enhance your experience.
  3. — The Shidu voice amplifier is a top-notch device, yet you might need some help navigating its features every once in a while. The folks over at Shidu understand this perfectly and have a dedicated customer support team on standby, just in case. To get in touch with them, all you have to do is visit their website for contact information. Whether you prefer emails, phone calls, or live chats, the customer support team is always ready to help you out.


By using a top-notch voice amplifier, you can elevate your teaching game to new heights. But, don’t just settle for any old equipment. When you decide to go with a Shidu voice amplifier, you want to make sure to take various factors into account, such as the size of your class, where you’ll be using it, and any other special requirements you might have. Luckily, Shidu offers a variety of options, each with its own distinct features. Take a look at the M800, S278, and S611, and choose the perfect one that will take your lessons to the next level.

Simona Johnes

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