JBL PartyBox 300 Review 2024 - Speakers Reviewed

JBL PartyBox 300 Review

When it comes to audio equipment, JBL has been a trusted name for decades. The JBL PartyBox 300 is no exception, promising to elevate your party experience to new heights. This powerful portable speaker is designed to deliver exceptional sound quality, impressive volume, and a dazzling light show to set the mood. In this review, we’ll dive into the features, performance, and overall user experience of the JBL PartyBox 300, exploring why it’s a popular choice for party enthusiasts and music lovers alike.

InputsUSB, RCA, Aux, Mic/Guitar
OutputsRCA L/R
Wireless ConnectivityBluetooth
Transducers2 x 6.25 woofers and 3 x 2.25 tweeters
Frequency Response45Hz to 20 kHz
Battery Life18 hours
Charging Time5 hours
Dimensions27.1″ x 12.2″ x 12.5″
Weight35 lbs


  • separate volume controls for the guitar and microphone inputs.
  • Use the speaker’s built-in Lithium-ion 10.000mAh battery or the 12V DC output of your car to get about 18 hours of playback time.
  • There are three different LED light modes: pulse, meter, and party mode.
  • ‘Bass boost’ button that produces astounding bass.
  • To easily stream music, connect your flash drive to the USB port.
  • You don’t need to worry about bringing an extra charger because the USB port also allows you to charge other devices right from the speaker.
  • The JBL PartyBox 300’s True Wireless Stereo functionality enables you to pair a second compatible speaker with it via Bluetooth or a wired RCA output.


The JBL PartyBox 300 boasts a robust and well-engineered design that exudes durability and style. Its sturdy construction allows it to withstand the rigours of party environments, making it suitable for both indoor and outdoor gatherings. The speaker features a sleek, modern look, with a seamless blend of matte and glossy finishes.

The carrying handles on either side make it easy to transport, while the well-placed control buttons and ports provide quick access to various functions. Moreover, the PartyBox 300 includes an integrated pole mount, enabling you to elevate it to a higher position for better sound dispersion during outdoor events.


If you’re looking for a speaker that can pump up the volume and get the party going, the JBL PartyBox 300 won’t disappoint. With a peak power output of 240 watts, this portable sound system can reach thunderous levels without compromising sound quality. It’s ideal for parties, outdoor events, and even small gatherings where you want to make an impact with your music.

Moreover, the PartyBox 300 comes with an adjustable bass boost feature, allowing you to customize the low-end frequencies according to your preferences and the environment.


The PartyBox 300 offers a wide array of connectivity options to cater to various devices. It includes a USB port, an AUX input, and Bluetooth connectivity, allowing you to connect smartphones, tablets, laptops, or even play music directly from a USB drive. The Bluetooth pairing process is straightforward, and the speaker maintains a stable connection within a generous range.

You can connect a CD player or a turntable with an amp using the RCA input. The USB port enables you to plug in flash drives so that visitors can choose their preferred music without using a smartphone to connect. There are controls above the microphone and guitar inputs that let you change the volumes separately. Therefore, the JBL PartyBox 300 is the ideal karaoke machine for playing or singing along to music that is already playing through it. To enjoy even more bass at bigger events, you can also connect two PartyBox speakers together via Bluetooth or the RC cable.


Given its powerful performance, the PartyBox 300 relies on a robust built-in rechargeable battery to keep the party going. With a single full charge, the speaker can last for up to 18 hours, ensuring you can enjoy extended playtime without worrying about running out of juice.

Sound Quality

One of the standout features of the JBL PartyBox 300 is its exceptional sound quality. With dual 6.5-inch woofers and three 2.25-inch tweeters, this speaker produces a powerful and dynamic sound that fills the room with clarity. Whether you’re playing your favourite tracks or streaming music from your preferred service, the PartyBox 300 delivers deep bass, detailed midranges, and crisp highs, resulting in an immersive listening experience.

Additionally, the speaker’s True Wireless Stereo (TWS) capability allows you to connect two PartyBox 300 units wirelessly, further enhancing the soundstage and volume for larger gatherings or spacious areas.


The JBL PartyBox 300 costs $449.95 as of the writing of this article; this price may be affordable to some people while being costly to others. However, given that this speaker is ideal for all situations, including home music listening, parties, and serving as a portable sound system from a car trunk, you’re undoubtedly getting your money’s worth.

What You Will Recieve

  • The JBL PartyBox 300
  • AC Power Cord
  • 12 DC Cable
  • Quick-Start Guide
  • Safety Sheet
  • Warranty card

A heavy-duty vehicle charging cable and two accessories, a power cable and audio cables, are included with the PartyBox 300. The PartyBox, as was already mentioned, weighs a hefty 35 pounds and has handles built right in. Sometimes it’s difficult to comprehend how this speaker is portable given its internal battery. Therefore, a solution would be a set of wheels that could be detached to make moving around simpler.


In conclusion, the JBL PartyBox 300 lives up to its promise of being the ultimate party sound companion. With its impressive sound quality, powerful volume, captivating light show, and versatile connectivity options, it’s undoubtedly an excellent choice for those who love to host gatherings and enjoy music to the fullest.

So, if you’re on the hunt for a feature-packed, durable, and high-performance portable speaker that brings life to your parties, the JBL PartyBox 300 should be at the top of your list. Get ready to unleash the power of ultimate party sound and make every event an unforgettable audio experience!

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