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JBL PartyBox 300

Portable Bluetooth® speaker with light display

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Item # 109PBOX300

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Our take on the JBL PartyBox 300

Serious about having fun? Bring a JBL PartyBox 300 to your next shindig. This big, rugged, 35-pound speaker will crank out your tunes with massive, hard-hitting sound to get people moving. And the PartyBox 300's three-mode light effects help set the mood.

Bring the party

JBL PartyBox 300

Serious about having fun? Bring a JBL PartyBox 300 to your next shindig. This big, rugged, 35-pound speaker will crank out your tunes with massive, hard-hitting sound to get people moving. And the PartyBox 300's three-mode light effects help set the mood.

If anyone wants to sing or play along with the music, the PartyBox has both guitar and microphone inputs. Stream tunes via Bluetooth from your smartphone or tablet. Or plug in a flash drive preloaded with your party mix.

Big sound indoors and out

The PartyBox 300 features two 6-1/2” woofers and three 2-1/4” tweeters for powerful, clear sound. A rear-firing port reinforces the bass. And there's also selectable Bass Boost if you want to make your tunes thump even more.

Want bigger sound? You can pair two PartyBox 300 speakers together for either two-channel stereo or just to double the volume. The speakers can be paired wirelessly via Bluetooth, or they can be connected with RCA cables.

Making connections

You might use a Bluetooth phone or tablet as the music source most of the time, but you have other options, too. The stereo RCA input lets you connect a CD player or a turntable with built-in phono preamp. A USB port on the back lets you plug in flash drives.

There are two 1/4” input jacks — one for a microphone, the other for a guitar. Volume control knobs let you set their levels independently. These inputs let you either sing or play along to music already playing through the PartyBox 300. Hello, karaoke night!

Portability and power

Integrated carry handles make the PartyBox 300 easier to transport. (But at 35 pounds, it's one of the heaviest "portable Bluetooth speakers" we've ever seen.) The speaker has a built-in rechargeable battery that can deliver up to 18 hours of operation. You can use the speaker's USB port to charge your smartphone or tablet. And the PartyBox 300 comes with a detachable AC power cord, so you can keep the sound and light show going indefinitely.

Product Highlights:

  • two 6-1/2" woofers, and three 2-1/4" tweeters
  • frequency response: 45-20,000 Hz
  • built-in Bluetooth
  • light effects with three modes: Meter, Pulse, and Party
  • pair two JBL PartyBox 300 speakers
    • for two-channel stereo or for double volume
    • connect wirelessly via Bluetooth, or wired via RCA stereo cables (not included)
  • EQ settings and bass boost
  • RCA stereo input and output
  • stereo minijack input for portable devices
  • two 1/4" input jack inputs for microphone and guitar
    • independent volume controls
  • USB port for flash drives and recharging smartphones and tablets
  • splash-resistant ported cabinet
  • integrated carry handles
  • 10,400mAh built-in rechargeable lithium-ion battery lasts up to 18 hours
  • detachable AC charging cable
  • 12-1/4"W x 27-1/16"H x 12-1/2"D
  • weight: 35 lbs.
  • warranty: 1 year
  • Our 60-day money-back guarantee

What's in the Box:

  • Bluetooth portable speaker
  • 5' AC power cord
  • 12' DC cable
  • Quick Start Guide
  • Warranty Card
  • Important Safety Instructions

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Hands-on research

Features and Specs

Weather-resistant No
Waterproof No
Speakerphone Mic No
NFC Touch Pairing No

Product Research


JBL Signature Sound: The JBL PartyBox 300 is equipped with three 2.25" dome tweeters and dual 6.5" cone woofers powered by a built-in 120-watt (RMS)/240-watt (Peak) amplifier for dynamic JBL signature sound with clear highs and deep bass. There is rear-firing port and Bass Boost function which helps enhance the powered speaker's bass performance.

Bluetooth Audio Streaming: The JBL PartyBox 300 is equipped with built-in Bluetooth 4.2 with support for wireless audio streaming (A2DP) and playback control (AVRCP). You'll be able to stream stored music, music apps, and other audio content on Bluetooth source device (such as your smartphone, tablet, computer, or laptop) to the PartyBox 300. You'll also be able to control basic playback functions such as Play, Pause, & Skip from the speaker. You will continue to use your Bluetooth-enabled device for advanced music navigation and to view song/artist/album information.

Note: The JBL PartyBox 300 does not support Bluetooth hands-free communication for making and answering phone calls.

USB Port: The JBL PartyBox 300 features a USB (type-A) port for connection of a USB mass storage class (MSC) device, such as a USB thumbdrive. The PartyBox 300 supports playback of MP3, WMA, and WAV music files loaded onto a compatible USB MSC device formatted in FAT16 or FAT32. The USB port (rated at 5V/2.1A) can also be used to charge a USB-enabled portable devices, like your smartphone or tablet.

Note: The USB port does not support playback of Apple iOS or Android OS devices.

Dual Aux Inputs: The JBL PartyBox 300 is outfitted with dual Aux inputs, consisting of a 3.5mm input and stereo RCA input, for connection of an external audio device. There is also a stereo RCA output to daisy-chain two PartyBox speakers together for stereo sound.

Mic & Guitar Inputs: The JBL PartyBox 300 offers a 1/4" Mic and 1/4" Guitar input to really get your party started. The Mic and Guitar input each have an independent gain control.

Light Effects: The JBL PartyBox 300 features lighting effects to create a "party: experience. You can choose from 4 Light Modes - Meter, Pulse, Party, or Off.

Stereo Pairing: True Wireless Stereo uses Bluetooth to wirelessly link two PartyBox speakers together as a stereo pair. You can also create a stereo pair by daisy chaining two PartyBox speakers together using a wired RCA connection between one speaker's stereo RCA output and the other speaker's stereo RCA input for bigger sound. There is a L/R switch on the back of the speaker that lets you choose which speaker plays the left channel and which speaker plays the right channel.

Power Requirements: The JBL PartyBox 300 can be powered via 120V AC, 12V DC, or via its built-in battery. It includes a detachable 5' AC power cord which plugs into the back of the speaker and into an AC power outlet or surge protector (sold separately). It also includes a 12' DC cable that plugs into the back of the speaker and into the cigarette lighter port or 12-volt power port of your vehicle. The built-in rechargeable lithium-ion battery (1040mAH/7.2V) provides up to 18 hours of playback with 5 hours of charge time.

Mounting Options: The JBL PartyBox 300 can be positioned vertically or horizontally. For best sound quality always make sure two of the three tweeters are placed on the uppers side of the speaker enclosure.

Integrated Carry Handles: Two integrated carry handles make it easy to transport the JBL PartyBox 300 speaker.

Our Product Research Team

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