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DJ Tech Reviews

JBL PartyBox Stage 320

A wheeled 240 W party speaker with a swappable battery and loud, deep bass; heavy at 16.5 kg and only splashproof.

JBL PartyBox Stage 320 at an angle with its light show on

Photos: JBL / HARMAN International

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7 of 7 professional reviews recommend it
Best for
Backyard and house parties that need loud, bass-heavy sound and karaoke inputs on battery.
Skip it if
You need clean sound at full volume, rain-proofing, or something easy to lift.

The Internet’s Opinion

From 7 professional reviews and 1 owner review: a fair amount of evidence.

All seven professional reviews recommend it as a loud, bass-heavy party speaker that rolls on wheels, with a battery that swaps out and an app full of EQ, light and effect controls. The repeated reservations are its 16.5 kg weight, sound that turns harsh or compressed near full volume, IPX4 splash protection only, and battery life well short of 18 hours at party volume.

7 recommend0 mixed0 avoid

What people praise

  • Loud, with deep and punchy bass
  • The app adds EQ, light-show control and DJ-style effects
  • The battery swaps out, so a spare keeps the party going
Show 4 more
  • Wide wheels and a telescopic handle make it easy to move
  • Bright light show with plenty of patterns
  • Microphone and guitar inputs for karaoke and busking
  • At moderate volume the battery matches or beats JBL's 18-hour rating

What to know first

  • Heavy at 16.5 kg, noticeable whenever it has to be lifted
  • Sound turns harsh or compressed near full volume
  • Only IPX4 splash protection, so keep it out of the rain
Show 2 more
  • At party volume with the lights on, the battery falls well short of 18 hours
  • The app can be slow to load or connect
See the 7 reviews behind this

7 professional reviews (7 recommend, 0 mixed, 0 avoid); 1 owner review read at Guitar Center (1 posted); Thomann does not list itCompiled 2026-10-17How this is compiled

Prices

Before you buy

Status
Current

Works with

  • Phones, tablets and laptopsBluetooth 5.4

    Bluetooth 5.4 with multipoint connection, so two devices can stay paired Manufacturer spec sheet (JBL), checked 2026-10-17

  • Other Auracast PartyBox speakersAuracast link

    Two Stage 320s stereo-pair and more JBL Auracast PartyBoxes connect wirelessly; firmware 2.0.0 (July 2024) added connection with the PartyBox 710, 310, 110, Encore and Encore Essential Manufacturer spec sheet (JBL (product page and firmware notes)), checked 2026-10-17

  • Microphones and a guitarTwo inputs

    Input 1 takes a microphone and input 2 switches between microphone and guitar, with gain on the back and volume, echo, treble and bass for the mics on top Manufacturer spec sheet (JBL (PartyBox Stage 320 owner's manual)), checked 2026-10-17

  • JBL EasySing wireless micsFirmware 3.4 or later

    Firmware 3.4.0 (March 2026) added the EasySing Mics and 4.0.0 (May 2026) the EasySing Mic Mini Manufacturer spec sheet (JBL (firmware notes)), checked 2026-10-17

  • JBL PartyBox and JBL ONE appsFree app

    EQ, light patterns and party effects; JBL says the PartyBox app will no longer be updated and is moving the Stage 320 to the JBL ONE app Manufacturer spec sheet (JBL), checked 2026-10-17

  • USB drivesMP3, WAV, WMA, FLAC

    Plays MP3, WAV, WMA and FLAC files from FAT16 or FAT32 drives; the port also charges a phone at up to 5 V / 2.1 A Manufacturer spec sheet (JBL (PartyBox Stage 320 spec sheet)), checked 2026-10-17

You’ll also need

  • Spare battery (optional)Sold separately

    Only one JBL Battery400 comes fitted; a spare is sold separately, and a 10-minute charge adds about two hours Manufacturer spec sheet (JBL), checked 2026-10-17

  • Microphones and audio cablesNot in the box

    The box holds the speaker, a quick-start guide, a safety and warranty card and an AC power cord; aux and daisy-chain cables are not supplied Manufacturer spec sheet (JBL (PartyBox Stage 320 owner's manual)), checked 2026-10-17

  • Cover from rainIPX4 only

    Rated IPX4 splashproof, not waterproof; JBL says to keep the protective covers closed and the charging port dry Manufacturer spec sheet (JBL (PartyBox Stage 320 owner's manual)), checked 2026-10-17

Key specs

Configuration
Battery-powered party speaker on wheels, 2 woofers and 2 tweeters, with light show
Woofer size
6.5 in
LF driver
2 x 6.5 in (165 mm) woofers
Amplifier power (total)
240 W RMS (IEC 60268)
Low-frequency extension
40 Hz (-6 dB)
Frequency response
40 Hz – 20 kHz (-6 dB)
All 15 specifications
Inputs
2 x microphone (input 2 switchable to guitar), 3.5 mm aux, USB-A (MP3, WAV, WMA, FLAC playback)
Weight
16.5 kg (36.38 lb)
HF driver
2 x 1 in (25 mm) dome tweeters
Outputs
3.5 mm daisy-chain in/out; USB-A charge out 5 V / 2.1 A
Connection
Bluetooth 5.4 (A2DP 1.4, AVRCP 1.6), multipoint; Auracast multi-speaker connection
Battery
Up to 18 hours (varies with volume and content); replaceable JBL Battery400, Li-ion 68 Wh; 3-hour charge
Power
100–240 V AC, 50/60 Hz, or internal battery
Water resistance
IPX4 (splashproof)
Dimensions (W x H x D)
335 x 669 x 385 mm (13.19 x 26.34 x 15.16 in)

15 of 15 figures sourced; hover one for its source

Our take

Rory TassellWritten from the sources on this page, not from a loan unit.

All seven professional reviews recommend it for loud, deep bass, a battery that swaps out, easy rolling on wide wheels and an app full of EQ, light and effect controls. The reservations are its 16.5 kg weight, sound that turns harsh or compressed near full volume, IPX4 splash protection only, and battery life well short of 18 hours at party volume with the lights on. Buy it for parties away from a socket; for long nights, add a spare battery.

What it is

Status, October 2026: current. JBL still lists the PartyBox Stage 320.

What it is

The PartyBox Stage 320 is a battery-powered party speaker on wheels from JBL, the HARMAN brand, and the successor to the PartyBox 310 (JBL product page). It went on sale in the first half of 2024 and sits in the middle of the PartyBox range, above the smaller PartyBox Club 120.

Two 6.5-inch woofers and two 1-inch dome tweeters share 240 W RMS, with a quoted response of 40 Hz to 20 kHz (-6 dB), framed by a light show of rings, strobes and starry effects. JBL's AI Sound Boost adjusts how hard the drivers are pushed from the incoming signal.

The JBL Battery400, a 68 Wh lithium-ion pack, is rated for up to 18 hours depending on volume and content and charges in three hours. It sits behind a latch on the back, so a spare, sold separately, can be swapped in. A telescopic handle and two wide wheels move its 16.5 kg, the cabinet is rated IPX4 for splashes, and a socket underneath fits a 35 mm pole.

Connections are Bluetooth 5.4 with multipoint, Auracast for stereo pairing or linking other JBL Auracast PartyBoxes, a 3.5 mm aux input, a 3.5 mm daisy-chain in/out and a USB-A port for playback, charging and, since a 2026 firmware update, recording the mic and guitar inputs. Two microphone inputs sit on the back, the second switchable to guitar, with echo, treble and bass for the mics on top. The JBL PartyBox app handles EQ, lights and effects, and JBL is moving the speaker to its JBL ONE app.

It measures 335 x 669 x 385 mm. The box holds the speaker, an AC power cord, a quick-start guide and a safety and warranty card.

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