JBL Partybox 300 Review

JBL Partybox 300 Review

If you are looking for a speaker that can rile up the party with a booming sound and set the ambiance with its splendid lighting display, then you know that JBL is one company that excels in coming up with such types of sound systems. From its Pulse series to the Partybox series including the JBL partybox 1000 review we recently shared, JBL has brought to the market some top-quality and powerful speakers lineups featuring dazzling light performance that can set the party to fire. Be it inside the house, in your garage, clubs, or for your backyard BBQ, these bass-boosted speakers from JBL are a complete package within themselves. 

JBL Partybox 300 Review: The Best Party Speaker

What Are JBL Partybox 300 Specs?

One of the best portable speakers with bass, JBL Partybox 300 is a large one that has a blockish appearance, a loud audio output, and an amazing light show, making it an ideal candidate for high-end parties, gatherings, or shows that need a professional sound system. This speaker is one of the second-loudest bass-boosted speakers from JBL after its successor Partybox 1000. With that said, if you are looking for a smaller and more portable option, easy-peasy from the pricing standpoint with similar features, then Partybox 100 and Partybox 200 can be considered too. 

The Versitility of 300

JBL Partybox 300 is battery-powered and portable which makes it a convenient option for individuals who are always on the move. The best part about this audio system is that it is not just a regular speaker that gives blasting audio output only but is a rather versatile audio system that is packed with a variety of features for diverse use. For example, it has a microphone output to connect to the mic and sing along or speak, you can plug in your guitar or any other instrument, or play your favorite playlist from the external USB drive. You can also plug it into a power outlet and operate it in case its battery runs out of charge. 

JBL Partybox 300

The JBL Partybox 300 review in the upcoming sections will give you a detailed view on various aspects like JBL Partybox 300 watts, features, sound quality, design and construction, and more. 

JBL Partybox 300 Specs at a Glance:

Frequency response45 Hz to 20,000 Hz
Impedance 40 Ohms
Maximum Power Output240 Watts
Signal to Noise Ratio65 dB
Rechargeable BatteryYes
Battery Capacity 10400 mAh
Playback time 18 hours 
Charging time 5 hours
Drivers2 X 6.5 inches subwoofers, 3 X 2.25 inches tweeters
Connectivity Inputs USB port, 3.5mm Aux jack, Mic and Guitar inputs, Stereo 2 RCA input
Output terminal2RCA Stereo
Wireless ConnectivityBluetooth 4.2
Weight 34.9 lbs
Auto power shut downYes
Portable speakers with bassYes
Waterproof rating No

Note: JBL Partybox 310 is the extended and upgraded version of Partybox 300 and has better sound quality than the latter. It also has a splashproof build, which makes it slightly better than Partybox 300. Partybox 310 also uses the latest Bluetooth version 5.2 which gives a better and larger connectivity range, allowing uninterrupted streaming of the tracks.

While the JBL Partybox 300 specs would have given a fair idea about these bass-boosted speakers and what these speakers bring in, let’s move on to the detailed JBL Partybox 300 review. 

JBL Partybox 300 Review

Partybox 300 is a large-sized speaker which has a lot to offer than just the functionality of a speaker that amplifies the sound. This JBL Partybox 300 review is one among many with high ratings from users as well as technical experts on various aspects like design, performance, durability, loudness, etc. so let’s dig a bit deeper to see how this speaker can be an ideal solution to any social gathering.

The speaker is available on JBL’s official website or Amazon.com. Click on the link to check the price and features.

JBL Partybox 300 Review: Design and Build


The design of the JBL Partybox 300 is pretty similar to its Partybox counterparts, but with different dimensions. These bass-boosted speakers are long at 32.4 X 15.59 X 15.48 inches, which is quite big, even though it is not as large as the next and the biggest model that JBL has in the series. The body of the speaker has a tough build with a metallic grille on the front panel that protects the LED lights and the speakers inside. 

JBL Partybox 300
LED Lights:

The LED lights are the main attraction of this speaker and give a visually appealing look when the speaker is on. They are circular bands that highlight the two woofers, giving them a sophisticated yet rugged look. You will also see four strobe lights arranged around the edges of the panel. You also get the option to turn the lights off if you do not prefer them or are too sensitive to light. The speaker has a three-fold design that makes the speaker more versatile and high-performing. 

Material Build:

When it comes to the material, it is constructed with good quality hard plastic, which adds to the durability of the product. However, do remember that the speaker is not water or dust-resistant. It may not be a good idea to use it near the swimming pool, beaches, or any other place where it may have direct exposure to water and dust. 

Both the sides of the speaker feature a caged look that has the tweeters beneath them. The good thing is that the woofers and the drivers inside are oriented in a way that the speaker can be placed in both vertical and horizontal manner depending on your convenience. There are four rubber feet on each of the side panels for stability, so when the speaker is placed horizontally, it doesn’t crawl due to the vibrations of the sound. 

Now, one important thing worth mentioning here is that the speaker doesn’t have wheels. This is a drawback as JBL usually designs all its speakers with care and because the speaker is quite large and heavy. The company, however, has designed a rolling transporter bag for easy transport of the speaker. The sound system does have a sturdy handle which enables you to tilt it or lift it if need be. 


One of the popular bass-boosted speakers, JBL Partybox 300 has easy-to-use and simple-designed controls. The controls are located on the top surface of the speaker. To the right of the panel, there is a power on and off switch, a Bluetooth button that allows you to pair with other JBL speakers, and a light button that controls the LED lighting or changes the patterns. On the left, you will find the play/ pause controls and Bass Boost button. 

You will see this dedicated Bass Boost controlling button in several portable speakers with bass. The whole purpose of this technology is to add extra oomph to the sound. There is no option for skipping a track in this speaker. In case you want to do so, you will have to navigate it from your phone or the device you are using as the main audio source. JBL has assigned a battery indicator right above the power button. Five tiny LED indicators indicate the amount of charge left in the speaker. 

We did find a couple of other reviews along JBL Partybox 300 reviews stating that the control buttons are a little tight to press, however, they do click well, so it is not that big of a deal. 


The back of the speaker has a panel that is dedicated to different input and output ports. As mentioned in the JBL Partybox 300 specs and the jbl flip essential specs, the speaker has two RCA ports, so you can join with another device or with another Partybox 300 speaker through the wire for an amplified sound. There is a 3.5 mm AUX jack in case you want to connect an older device for charging or for playing music. The USB-A port is added there, so you can charge your mobile or other devices through the speaker’s battery. 

You can also use your USB flash drive if you want to program your playlist before a party. There are two designated ports for guitar and microphone, with separate knobs right above them to control the echo or tune them. If you are looking for a positive JBL Partybox 300 review, you will have no problem finding one. Especially about the overall design and build of the product. The placement of the subwoofer, and the tweeters, and the user-friendly controls make it a portable speaker with bass-heavy audio output.  

JBL Partybox 300 Review: Features

Bass Output:

Several significant features make this speaker an advantageous one. One of the most prominent ones that make it stand out in the crowd is its amazingly loud sound with heavy bass output. We are sure that you have seen other reviews say the same thing as this JBL Partybox 300 review online that are sure to convince you about the speaker’s sound capabilities. More of this is in the next subsection under the sound quality and performance. 


It is a ‘perfect party speaker’ with built-in lights to go with the sound. The lighting of the speaker has three different modes- Meter, Party, and Pulse. You can change between the modes depending on the party mood to get the real feel and perfect visuals. Other than that, as mentioned earlier, the separate connectivity inputs for the guitar and the mic make it a stage-perfect setup. You can use the mic if you want to reach the crowd at a distance, for karaoke or singing while the guitar input lets you play along with the music from the speaker. If you are looking for more wonderful Light Modes, all you need to do is visit our jbl pulse bluetooth speaker review.

Bluetooth Connectivity:

When it comes to ‘wireless connectivity, Partybox 300 supports Bluetooth 4.2 with a connection range of about 56 meters for seamless audio streaming. You can pair two devices at the same time with the speaker, which makes it easy to shift between the devices if you want to play different tracks from both of them. This also makes it an ideal outdoor speaker. Apart from the Bluetooth connection, you can also use the speaker by connecting it to a 12 Volt DC power outlet. 


The ‘True Wireless Stereo’ feature allows you to sync two different Partybox 300 if you are using them in a large room of an open space where the sound needs to be amplified. This enhances the audio, offers a louder and stronger surround sound with far-reaching effects delivering a better listening experience. 


Partybox 300 is equipped with a special Bass Boost button. This additional bass enhancement feature gives an incredible bass presence to the tracks that you are playing. It is especially useful for the low-frequency audio that is otherwise unclear or sound faded. Using the bass boost button you can add a punch and depth to that sound. 

Power Bank:

The speaker has ‘power bank capabilities’ meaning you can charge your mobile and other devices by connecting them to the speaker’s USB-A port or Aux port (in the case of older devices). 

JBL Partybox 300 Review: Sound Quality and Performance

Output Quality:

The most talked-about feature of the Partybox 300 sound machine is its bass-boosted speakers. With its incredibly powerful audio output for its size, the speaker has earned a lot of appreciation from us in this JBL Partybox 300 review as well as from its users and product experts. Partybox 300 delivers a well-balanced sound with not so overpowering yet boosted bass across all the music genres. This means that while you get to experience the pounding bass presence without losing out on the other elements in a track. 

Even without the additional Bass Boost feature, the speaker is very loud and perfect. But if you want to add extra fun and richness to the bass notes, then the bass boost technology is sure to do its magic. The bass response is pretty heavy and undistorted at moderate volumes, but if you turn the volume to the top, then you may experience little deviation and distortion. So if you are a fan of bass-heavy music, then you may not entirely enjoy it at the highest volume. However, the speaker gives you the best experience at about 70% volume. 


Both the low and the high mids are in the right proportions and are accurately sculpted, delivering a graceful sound. The vocals are clear and audible and do not get overshadowed by the instruments playing in the background. So if you love vocal emphasized tracks, you are going to get mesmerized by the experience this speaker gives you. 

The mid and high trebles work fine when played at optimized volume but may get slightly stressed at high volumes. This may, however, depend on individual tracks because there are mixed opinions about these portable speakers with bass when it comes to the performance at high frequencies.

JBL Partybox 300 Review: Battery Life

Battery Capacity:

Partybox 300 uses a lithium-ion battery, which is known for its longevity and performance. The battery has a total capacity of 10,400 mAh with 18 hours you can spend listening to music, which is pretty decent. There are speakers similar to this one, that give 20 to 24 hours of playtime as well.  However, we need to consider the amount of power output, additional features like the Bass Boost button, the light showcasing feature consumes a lot of the battery power.

Run Time:

Quite similar to some other bass-boosted speakers in competition when run at a 50 to 60% volume, the speaker runs for as long as the company advertises (18 hours). On the other hand, when played at a full volume, it will give you a lesser runtime. The higher the volume, the more power gets drained out, which automatically reduces the playback time.

Charging Power:

One major concern about the speaker is that it takes a good time of 4.5 to 5 hours to charge fully. This is pretty long, but the good thing is that you can connect it with a cable to the power outlet and run the speaker simultaneously while its battery is charging. This will give you an uninterrupted flow of music, but it is only feasible if you have a power outlet to connect close by. If your car is in the vicinity where the party or the gathering is present, you may want to plug it into your car’s 12V socket and have fun!

JBL Partybox 300 Review: Pros and Cons

Pros Cons
1. Incredibly loud and mighty sound 
2. Good balance between the bass, the mids, and the highs
3. Portable speakers with bass boosting feature
4. Excellent battery life
5. Power bank capabilities
6. Auto shut off feature that can turn the speaker to standby mode when not in use for a long time 
1. No EQ settings are available to Customize the sound.
2. Not compatible with the JBL Connect + or PartyBoost app 
3. Not rated for waterproofing and neither is dust nor damage resistant
4. Looks tough but is not that strong in reality
No smart features like Voice Assistant integration

Are These Bass-boosted Speakers?

You will find many portable speakers with bass boosting technology that is marketed and sold by different brands. But why do people need that extra bass enhancement? What is the importance of bass to any listener, and how does it elevate the listening experience? 

Well, if you have listened to a bass-rich track at a decently loud volume, you would know the feeling of it. Yes, it is a combination of a physical sensation and listening experience because it provides both rhythm and harmony to a song or music. This is why the bass is often linked with the terms thumping, pounding, thundering, vibrating, etc. right? 

Bass is often subdued in many tracks, or they are superfine and difficult to hear unless for high-level audio equipment. The main reason is that they are min-frequency sounds, often lower than a human hearing range which is 20 Hz to 20,000 Hz.  However, it is a vital part of music and has a powerful role to play in determining the overall quality of the output. Bass renders power to the music and being a low frequency, sets the platform for other high-frequency notes in a piece of music. This is the “harmonic function” of the bass which adds a balance and coordination among all the frequencies for an elevated listening experience. 

The Rhythm is the Key

Another important function of bass in a piece of music is the “rhythmic function”. Interestingly, because of being on the lowest side of the frequency spectrum, it is easier to feel the bass effect than hearing it. Owing to the resonating property of low-frequency bass, you get the thumping effect that gets you excited in a bass boosted music and makes you want to dance to the beats. It also fills in the gap between the drums and the guitar producing a well-coordinated and smooth flow of music.

A track without a good bass response sounds dull and flat without the energy that a piece of good music can offer. The speakers are, therefore, engineered to improve the bass of a track owing to their loud output capability and the built-in bass radiators. The passive bass radiators work due to air pressure created by the speaker inside and heighten the response of the low-frequency sound. This is where the Bass Boosting technology also comes into the picture in the case of modern-day speakers. 

Now, while some speakers have the in-built bass boosting mechanism, some have a designated bass boost button that gives that extra thrust to the existing bass effect making the music sound more lively and rhythmic. 

Lets now move onto some alternate devices that you can put your mind one once you finish reading this JBL Partybox 300 review.

Some Alternatives to JBL Partybox 300

If you are looking for a well-sounding wireless transportable speaker, there are many options available in the market that vary in size, design, versatility, and more within a broad pricing spectrum. If you think JBL Partybox 300 is not what you want, don’t worry! Here’s a list of some products that you may want to take a look at: 

Ultimate Ears HYPERBOOM

If you want a good mobile speaker with Bluetooth connectivity and solid sound output, then this one from Ultimate Ears can be something worth considering. Even though this speaker lacks slightly on the low-frequency bass output, it has Equalizer settings and several presets that allow you to set audio so that it suits your ears. The speaker is impressively loud with a whopping 23+ hours of battery life, making it a perfect outdoor speaker if you are planning an entire day outside. The speaker also has a spill and splash-proof build to suit your active lifestyle and is an ideal one for podcasts. 

Anker Soundcore Rave Mini

Anker Soundcore Rave Mini

One of the best portable speakers with bass enhancement technology, this one is a stunner. With an unbelievably massive sound delivery of 101 dB for its size, the speaker can rattle the windows when played at a high volume. It is a highly versatile system with an audio-synchronized light display, 100% waterproof build, EQ and light personalization through the app, and 18 hours of playback time. With all the features and the BassUpTM technology for intensifying the bass response, this speaker is a great value for money if you are looking for an economic option. The speaker is also a solid competition to both JBL Partybox 300 and Partybox 310. 

Bose S1 Pro System

Bose S1 Pro System

This is the loudest speaker from Bose’s outdoor speaker lineup with a rugged look and a perfect PA system. Its well-adjusted audio profile, a designated input for mic and guitar makes it a great option for stage performers. One of the ideal choices for bass-boosted speakers comes with the company patented ToneMatch technology which adjusts the EQ of the sound automatically as per the placement of the speaker (vertical, horizontal, or even sideways). It has a battery life of 11 hours and allows easy streaming of podcasts by connecting to the source device effortlessly.

Sony XB72

Sony XB72

If you are looking for a very large speaker with a light display within a reasonable price range and do not care about the portability, then this speaker from Sony is worth taking a look at. While there are many better options for bass-boosted speakers, this speaker has its uniqueness in terms of Sony signature bass emphasized sound. The speaker is compatible with Sony’s audio enhancement and speaker app that allows you to set the sound equalizer, choose from the presets, and a few other additional party-related features. The speaker, however, smokes out a little on the lower bassline when the volume is turned up. 


Coming back to JBL Partybox 300 Review, JBL Partybox 300 is one of the well-tuned, bass-boosted speakers in the mix that can deliver a wonderful listening experience. The sound quality and the overall audio profile are fairly proportioned, and the speaker can get loud and booming. The dazzling play of the light added with the music and the beats contribute to making the party even more fun and thrilling. This speaker does lack a few things like waterproof protection, integrated wheels, etc. which the company has compensated for in its upgraded model JBL Partybox 310 which also uses the latest Bluetooth version. Click here to check out Partybox 310

Frequently Asked Questions(FAQs)

Which speakers can JBL Partybox 300 connect with? Can it be synced with its upgraded version Partybox 310? 

Partybox 300 uses the True Wireless Stereo feature to connect with either Partybox 200 or Partybox 300 only. Unfortunately, it cannot be connected with Partybox 310

Can this speaker be used on beaches?

The speaker does not have a water or dust protection build which means that you have to be careful when using it in dust-prone areas or near the pools. Using it at the beaches may expose it to the sand so if at all you want to use it, you may want to place it on a platform that is above the ground level instead of keeping it in the dust. 

Is partybox 300 ideal for musicians or a stage show? 

Well, the speaker comes with a designated port for the mic and guitar individually. Although it doesn’t have a lot of features of a DJ pad etc., as its next-generation model Partybox 1000, it can be used for low-profile shows. This means that you can use it for singing, speaking, performing karaoke, playing guitar, etc. which makes it a stage-friendly device and an option that music artists may want to consider. 

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