Description
400W of JBL Pro Sound. Up to 15 Hours of Party.
AI Sound Boost · Auracast Multispeaker · Beat-Synced Lightshow.
Dual woofers and dome tweeters · stereo output · replaceable battery · 10-minute fast charge for 2 extra hours · IPX4 splash resistance · telescopic handle and wheels · Bluetooth, USB and PartyBox App control
A Delhi party does not stay in the drawing room. It spills onto the terrace at 10 PM, into the lawn at a farmhouse in Chattarpur, onto the roof for Holi and into the banquet hall for the sangeet. That is exactly where a phone speaker or a soundbar gives up — open air swallows sound. The PartyBox 520 puts out 400 watts of JBL Pro Sound in stereo, driven by dual woofers for deep, controlled bass and dome tweeters for highs that stay crisp at volume. It fills a big open space, and it stays clean while doing it — so the dhol track hits the way it is supposed to at the far end of the terrace, not just next to the speaker.
AI Sound Boost — the speaker tunes itself to the room
The same speaker has to work in a closed 12×14 bedroom, an open terrace and a marble-floored hall. Each of those does something different to sound. JBL's AI Sound Boost automatically optimises the output for better clarity, stronger impact and more controlled performance across those different party environments — pushing the drivers harder where it can, holding them in check where the room is already doing the work. You get the maximum honest output the space allows without distortion creeping in, and without you crouching over an equaliser at midnight. Add the beat-synced Futuristic Lightshow — starry effects, light trails and strobes — and the room changes character the moment the music starts.
Built to be moved — and built for Delhi weather
A 25.5 kg floor-standing speaker with a telescopic handle and wide wheels rolls: out of the storeroom, across the drawing-room floor, into the lift, into the boot of the car, onto the terrace. You tilt and pull it like a suitcase instead of carrying it. And once it is outdoors, IPX4 splash resistance means a monsoon drizzle at a rooftop party, a poolside evening in Gurgaon or the spray from a Holi pichkari is not a reason to shut the music down and run for cover. Rugged body, real wheels, sealed against splashes — this is a speaker meant to leave the house.
🔌 Four ways to feed it music
Bluetooth
Stream from a smartphone, tablet or laptop up to 10 metres away
USB Playback
Play straight off a USB drive — no phone, no data, no interruptions
Auracast
Link compatible speakers wirelessly to cover a bigger space
PartyBox App
Customise sound, lighting effects and playback from your phone
🎇 The lightshow, synced to your beat
Starry Effects
Points of light scatter across the room for an instant club ceiling
Light Trails
Colour sweeps run with the track and keep the floor moving
Strobe Effects
Hard flashes on the drop turn a terrace into a stage
Beat Synced
Every effect follows the music automatically — nothing to operate
🛠️ Everything engineered in
The fast charge is the quietly valuable one in Delhi — a ten-minute top-up during a power cut, or while the caterer is setting up, buys you two more hours of music.
Two woofers deliver clean, precise deep bass even at top volume, while the dome tweeters produce crystal-clear highs — so vocals and hi-hats stay separate from the bassline instead of turning into one loud blur.
The rechargeable lithium-polymer battery runs up to 15 hours on a full charge and fills in about 3 hours. The battery is replaceable, so a spare (sold separately) keeps a long night going without hunting for a socket.
Wirelessly link compatible speakers so one source plays across both — useful when the party runs from the drawing room to the terrace and you want the same track in both places, in sync.
Run sound, lights and playback from the JBL PartyBox App on your phone, or reach over and use the controls on the speaker itself when your phone is on charge in another room.
| Brand / Model | JBL PartyBox 520 · JBLPARTYBOX520IN ✅ |
| Product Type | Wireless Bluetooth Party Speaker ✅ |
| Speaker Type | Outdoor · Floor Standing · Multimedia ✅ |
| Total Power Output | 400 Watts ✅ |
| Audio Output Mode | Stereo ✅ |
| Sound Features | JBL Pro Sound · AI Sound Boost · Dual Woofers · Dome Tweeters ✅ |
| Lighting | Futuristic Lightshow — starry effects, light trails, strobe effects ✅ |
| Connectivity | Bluetooth · USB · Auracast Multispeaker Connection ✅ |
| App Control | JBL PartyBox App + onboard controls ✅ |
| Battery Type | Rechargeable Lithium Polymer ✅ |
| Battery Life | Up to 15 Hours ✅ |
| Fast Charging | 10-minute fast charge gives up to 2 hours extra playtime ✅ |
| Replaceable Battery | Supported — additional battery sold separately ✅ |
| Battery Charge Time | Approx. 3 Hours ✅ |
| Water Resistance | IPX4 Splash Resistant ✅ |
| Maximum Range | 10 metres ✅ |
| Signal-to-Noise Ratio | 80 dB ✅ |
| Compatible Devices | Smartphone · Tablet · Laptop · Music Players ✅ |
| Portability | Telescopic handle · wide wheels · rugged body ✅ |
| Dimensions (D × W × H) | 36.9 × 41.5 × 76.9 cm ✅ |
| Weight | 25.5 kg ✅ |
| Colour | Black ✅ |
| In the Box | JBL PartyBox 520 Speaker · Power Cable · Quick-Start Guide · Safety Instructions & Warranty Card ✅ |
| Warranty | 1 Year Manufacturer Warranty ✅ |
Why buy from Mahajan Electronics?
- We demo the speaker in-store so you hear it before you buy
- 45+ years of trust in premium home electronics
- 24-hour delivery across Delhi NCR
- GST invoice — save up to 18% on business purchases
- Mahajan seller invoice and after-sales support
- Raja Garden · Jail Road · Dabri Mor
Order today. Delivered in 24 hours.
JBL PartyBox 520 · 400W JBL Pro Sound · AI Sound Boost · Futuristic Lightshow · Auracast · Up to 15 Hours Playtime · IPX4 · 1-Year Warranty
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