Wireless speakers / Compare

JBL Boombox 4 vs Sony ULT TOWER 9

A

Product A: JBL

Boombox 4

58 of 96 known

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B

Product B: Sony

ULT TOWER 9

53 of 96 known

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All 96 fields

Every value links to where we found it.

Only differences

AJBL Boombox 4

BSony ULT TOWER 9

General

6 of 8 differ

Series

Not available

ULT POWER SOUND2Press releasesony.mediaroom.com/2025-04-09-Sony-Electronics-Introduces-Three-New-Speakers-in-the-ULT-POWER-SOUND-Range-Featuring-Global-Superstar-Post-MaloneRead 15 October 2026The release names the ULT POWER SOUND Series.

Model numbersiMaker identifiers for this exact model and its listed variants. Excludes sibling models and other generations.

JBLBOOMBOX4WHTAM1Maker product pagejbl.com/BOOMBOX-4.htmlRead 8 October 2026

SRS-ULT900, YY7864E1Owner's manualhelpguide.sony.net/speaker/7864/v1/en/print.pdfRead 15 October 2026Guide cover states Model YY7864E. The parts section and contents name the speaker SRS-ULT900.

GTIN / EAN

Not available

0272429319233Retailer pageabt.com/Sony-ULT-POWER-SOUND-Series-ULT-TOWER-9-Party-Speaker-Bluetooth-in-Black-SRSULT900/p/221687.htmlRead 15 October 2026US listing for Model SRSULT900 gives UPC 027242931923. The AC-only 9AC has a different UPC and is not this product.

AnnouncediThe maker's first announcement of this model. This is separate from first retail availability.

3 September 20254Press releasenews.harman.com/releases/jbl-boombox-4-massive-power-iconic-bass-and-a-lighter-buildRead 8 October 2026

9 April 20252Press releasesony.mediaroom.com/2025-04-09-Sony-Electronics-Introduces-Three-New-Speakers-in-the-ULT-POWER-SOUND-Range-Featuring-Global-Superstar-Post-MaloneRead 15 October 2026Sony Electronics press release dated 2025-04-09, San Diego.

Status

Available1Maker product pagejbl.com/BOOMBOX-4.htmlRead 8 October 2026

Available3Retailer pageabt.com/Sony-ULT-POWER-SOUND-Series-ULT-TOWER-9-Party-Speaker-Bluetooth-in-Black-SRSULT900/p/221687.htmlRead 15 October 2026Listing is live with Add to Cart and a 898 USD price for the rechargeable battery version.

PredecessoriThe model this one directly replaced, in the same line, tier and size, as the maker or a trusted review names it.

Not available

Not available

SuccessoriThe model that directly replaced this one, in the same line, tier and size. A revision such as a Slim or OLED model does not count when a next generation exists.

Not available

Not available

Launch price (US)iThe maker's US launch MSRP for the stated configuration, excluding tax. Current store prices and later discounts do not qualify.

$549.954Press releasenews.harman.com/releases/jbl-boombox-4-massive-power-iconic-bass-and-a-lighter-buildRead 8 October 2026US launch MSRP. Tax excluded.

$899.992Press releasesony.mediaroom.com/2025-04-09-Sony-Electronics-Introduces-Three-New-Speakers-in-the-ULT-POWER-SOUND-Range-Featuring-Global-Superstar-Post-MaloneRead 15 October 2026US suggested retail price 899.99 USD for the ULT TOWER 9 with battery. The AC-only ULT TOWER 9AC is a separate model at 749.99 USD.

Launch price (EU)iThe maker's euro launch price for the stated configuration, including VAT as published. Current store prices and later discounts do not qualify.

Not available

Not available

MarketsiISO country or region codes where this exact model or variant is sold. A source page's language does not establish availability.

Not available

US, GB, JP4Press articletechradar.com/audio/wireless-bluetooth-speakers/sony-adds-three-bluetooth-speakers-to-its-bass-hungry-ult-range-meet-tower-9-field-5-and-field-3Read 15 October 2026Launch article of 2025-04-09 names the powered Tower 9 at 899.99 USD and 850 GBP. The US market comes from the Sony press release and Japan from the NTT-X listing. No euro price is published for the battery model in the sources read, so launch_price_eur is left out.5Retailer pagenttxstore.jp/_II_SN16806247Read 15 October 2026Japanese listing for SRS-ULT900 gives release date 2025-05-16 and describes a splash-resistant top panel.

ColoursiThe maker's own colour names

Black, Blue, Squad, White1Maker product pagejbl.com/BOOMBOX-4.htmlRead 8 October 2026Product selector includes Black, Blue, Squad and White.

Black3Retailer pageabt.com/Sony-ULT-POWER-SOUND-Series-ULT-TOWER-9-Party-Speaker-Bluetooth-in-Black-SRSULT900/p/221687.htmlRead 15 October 2026Listing and spec table give Black Finish. No other finish is listed.

Speaker typeiHome covers speakers made to stay in one place, including smart speakers. A speaker with Wi-Fi or a voice assistant can be of any type.

Portable1Maker product pagejbl.com/BOOMBOX-4.htmlRead 8 October 2026

Party3Retailer pageabt.com/Sony-ULT-POWER-SOUND-Series-ULT-TOWER-9-Party-Speaker-Bluetooth-in-Black-SRSULT900/p/221687.htmlRead 15 October 2026Listing and the copied Sony page call it a party speaker with Party Lights, castors and karaoke inputs.

Audio

13 of 18 differ

Audio channelsiSound channels reproduced by one speaker. Pairing two speakers for stereo is separate.

Stereo6Reviewsoundguys.com/jbl-boombox-4-review-lighter-louder-and-better-than-the-boombox-3-149309Read 8 October 2026

Not available

Audio driversiPowered audio transducers in one speaker. Passive radiators are counted separately. Circular diameter and rectangular width and height have separate columns. Per-driver power must state continuous or RMS basis and battery or mains operation in the source note.

AJBL Boombox 4

Driver type	Count	Diameter (mm)	Rated power per driver (W)
Woofer	2	123	60
Tweeter	2	20	40

Source2Maker spec sheet (PDF)support.jbl.com/on/demandware.static/-/Sites-masterCatalog_Harman/default/dw5c227499/pdfs/JBL_Boombox_4_Specsheet_EN.pdfRead 8 October 2026Page 2. Battery mode is 60 W per woofer and 40 W per tweeter. AC mode increases each woofer to 65 W. All per-driver output figures are RMS ratings.

BSony ULT TOWER 9

Driver type	Count	Diameter (mm)	Width (mm)	Height (mm)
Woofer	1	Not available	320	320
Midrange	2	120	Not available	Not available
Front tweeter	2	50	Not available	Not available
Rear tweeter	2	40	Not available	Not available

Source1Owner's manualhelpguide.sony.net/speaker/7864/v1/en/print.pdfRead 15 October 2026Specifications: 3-way, bass reflex. Woofer unit about 320 mm x 320 mm (1), midrange unit about 120 mm diameter (2), front tweeter unit about 50 mm diameter (2), rear tweeter unit about 40 mm diameter (2). No per-driver power is published. The guide does not describe a passive radiator, so the passive radiator count is left out. The TV Sound Booster section says the 4 front components (2 tweeters and 2 midrange) are disabled while that function is on.

Passive radiatorsiPassive, unpowered bass radiators. Excludes powered drivers.

32Maker spec sheet (PDF)support.jbl.com/on/demandware.static/-/Sites-masterCatalog_Harman/default/dw5c227499/pdfs/JBL_Boombox_4_Specsheet_EN.pdfRead 8 October 2026

Not available

Rated audio poweriMaker-published total rated continuous audio output. Battery power is used for portable speakers when mains and battery ratings differ. Peak marketing power is separate.

200W5Press releasenews-latam.harman.com/pt/releases/jbl-boombox-4-potencia-massiva-graves-iconicos-e-estrutura-mais-leveRead 8 October 2026Maker launch release explicitly publishes 200 W RMS on battery.

Not available

Rated audio power on mainsiTotal rated continuous audio output with external power. Store a separate battery rating when the maker publishes both.

210W5Press releasenews-latam.harman.com/pt/releases/jbl-boombox-4-potencia-massiva-graves-iconicos-e-estrutura-mais-leveRead 8 October 2026Maker launch release explicitly publishes 210 W RMS with AC power.

Not available

Audio output power (unspecified rating)iMaker- or reviewer-published audio output power whose continuous or peak rating basis is not stated. This is separate from rated continuous output and explicitly published peak output.

Not available

320W7Retailer pageamazon.com/Sony-Bluetooth-Powerful-Convenient-SRSULT900/dp/B0DYB1BFRBRead 15 October 2026US Sony storefront listing, Pattern Battery Powered, gives Speaker Maximum Output Power 320 watts. Sony's help guide, press release and spec tables publish no audio power. The rating basis (continuous, peak or RMS) is not stated, so the value sits in the unspecified-rating field. The 153 W in the guide is power consumption, not audio output. One Indian listing names 520 W for the AC-only ULT TOWER 9AC, and Sony says the AC model gives more powerful sound.

Peak audio poweriExplicitly published peak audio output. Never substitute for rated continuous output.

Not available

Not available

Frequency response lower limit (claimed)iPublished acoustic frequency response limit. Tolerance and operating mode belong in the source note. The Bluetooth transmission range that some spec tables and retailers label Frequency Response, such as A2DP 20 to 20,000 Hz, is not stored.

37Hz2Maker spec sheet (PDF)support.jbl.com/on/demandware.static/-/Sites-masterCatalog_Harman/default/dw5c227499/pdfs/JBL_Boombox_4_Specsheet_EN.pdfRead 8 October 2026TECH SPEC publishes this endpoint. No amplitude tolerance or operating-mode condition is stated.

Not available

Frequency response upper limit (claimed)iPublished acoustic frequency response limit. Tolerance and operating mode belong in the source note. The Bluetooth transmission range that some spec tables and retailers label Frequency Response, such as A2DP 20 to 20,000 Hz, is not stored.

20kHz2Maker spec sheet (PDF)support.jbl.com/on/demandware.static/-/Sites-masterCatalog_Harman/default/dw5c227499/pdfs/JBL_Boombox_4_Specsheet_EN.pdfRead 8 October 2026TECH SPEC publishes this endpoint. No amplitude tolerance or operating-mode condition is stated.

Not available

Signal-to-noise ratio (claimed)

Not available

Not available

Adjustable equalizeriUser-adjustable frequency bands. Selecting fixed sound presets alone does not qualify.

Yes6Reviewsoundguys.com/jbl-boombox-4-review-lighter-louder-and-better-than-the-boombox-3-149309Read 8 October 2026

Yes1Owner's manualhelpguide.sony.net/speaker/7864/v1/en/print.pdfRead 15 October 2026Guide: select CUSTOM in Sound Effect in the Sony | Sound Connect app, then adjust CUSTOM EQ. CUSTOM is not available while TV Sound Booster is on.

Equalizer bandsiNumber of user-adjustable frequency bands. Do not count sound presets.

76Reviewsoundguys.com/jbl-boombox-4-review-lighter-louder-and-better-than-the-boombox-3-149309Read 8 October 2026Seven-band custom EQ in JBL Portable v6.8.30. Tested firmware 25.29.10.

103Retailer pageabt.com/Sony-ULT-POWER-SOUND-Series-ULT-TOWER-9-Party-Speaker-Bluetooth-in-Black-SRSULT900/p/221687.htmlRead 15 October 2026Copy of the Sony page says 10-Band Equalizer controllable through the Sony | Sound Connect app. The UK EE spec table lists Custom EQ band: 10. The help guide gives no band count.6Retailer pageee.co.uk/help/tech/device/Sony/SRS-ULT900WirelessSpeakerRead 15 October 2026UK spec table reproducing Sony data lists Custom EQ band: 10, Volume Step: 50, and the same driver sizes as the help guide. It lists water protection as Splashproof with no IP rating. It lists Bluetooth 5.3, SBC, AAC and LDAC, 153 W power consumption, 410 x 910 x 456 mm and 29.6 kg, which match the guide.

Automatic sound adjustmentiAdjusts audio to placement or playback conditions. Keep the named feature and conditions in the source note.

Yes1Maker product pagejbl.com/BOOMBOX-4.htmlRead 8 October 2026AI Sound Boost analyzes the audio in real time and adapts output to reduce distortion.

Yes1Owner's manualhelpguide.sony.net/speaker/7864/v1/en/print.pdfRead 15 October 2026Sound Field Optimization uses microphone sensing to detect noise around the speaker and adjust the sound. It is on at purchase and is turned off in Stereo Pair or Party Connect.

Sound modesiNamed playback modes. Battery extension modes are also qualified in battery source notes.

Deep Bass, Punchy Bass, Playtime Boost4Press releasenews.harman.com/releases/jbl-boombox-4-massive-power-iconic-bass-and-a-lighter-buildRead 8 October 2026

ULT1, ULT2, TV Sound Booster, STAMINA1Owner's manualhelpguide.sony.net/speaker/7864/v1/en/print.pdfRead 15 October 2026ULT button cycles ULT1 (deep bass), ULT2 (sense of power) and off. TV Sound Booster is a named mode for optical TV audio. STAMINA is a power option in the app that turns off lighting and sound effects including ULT POWER SOUND to save battery. No STAMINA playtime is published, so battery_life_boost_h is left out.

Wireless stereo pairingiTwo compatible speakers can play separate left and right channels.

Yes1Maker product pagejbl.com/BOOMBOX-4.htmlRead 8 October 2026

Yes1Owner's manualhelpguide.sony.net/speaker/7864/v1/en/print.pdfRead 15 October 2026Guide: Stereo Pair needs 2 ULT TOWER 9 speakers. One plays left and the other right over Bluetooth.

Speaker link protocolsiNamed systems for linking compatible speakers, such as PartyBoost, Auracast or Party Connect. Linking support does not establish compatibility across all models.

Auracast1Maker product pagejbl.com/BOOMBOX-4.htmlRead 8 October 2026

Party Connect, Stereo Pair1Owner's manualhelpguide.sony.net/speaker/7864/v1/en/print.pdfRead 15 October 2026Guide names the Stereo Pair and Party Connect functions.

Max linked speakersiPublished maximum in a speaker group. A stereo pair is recorded separately. A figure such as 100+ is stored as 100.

Not available

1001Owner's manualhelpguide.sony.net/speaker/7864/v1/en/print.pdfRead 15 October 2026Party Connect links up to 100 Party Connect compatible speakers over Bluetooth. Wireless Party Chain devices are excluded.

Max Bluetooth group speakersiPublished maximum speakers in one Bluetooth playback group, including the first speaker. Source notes name the compatible models or families, linking system and firmware requirements. Wi-Fi groups and concurrent Bluetooth source devices are excluded. A stereo pair alone does not establish the maximum when other Bluetooth linking systems are supported. A figure such as 100+ is stored as 100.

Not available

1001Owner's manualhelpguide.sony.net/speaker/7864/v1/en/print.pdfRead 15 October 2026Same Party Connect statement: up to 100 speakers over Bluetooth. Whether the 100 includes the first speaker is not stated. The guide points to https://www.sony.net/partyconnect-dvc/ for compatible models, and that page returned Access Denied, so the compatible models are not named here. Each speaker needs the latest pre-installed software. Codec switches to SBC and multipoint, Sound Field Optimization and the USB, AUDIO IN and OPTICAL IN sources are off while Party Connect is on.

Connectivity

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Bluetooth audio playbackiPlays audio streamed over Bluetooth from a phone or other source. Bluetooth used only for setup or app control does not count.

Yes6Reviewsoundguys.com/jbl-boombox-4-review-lighter-louder-and-better-than-the-boombox-3-149309Read 8 October 2026

Yes1Owner's manualhelpguide.sony.net/speaker/7864/v1/en/print.pdfRead 15 October 2026

Bluetooth versioniVersion of the Bluetooth radio. Some Wi-Fi speakers use Bluetooth only for setup. See Bluetooth audio playback.

5.42Maker spec sheet (PDF)support.jbl.com/on/demandware.static/-/Sites-masterCatalog_Harman/default/dw5c227499/pdfs/JBL_Boombox_4_Specsheet_EN.pdfRead 8 October 2026

5.31Owner's manualhelpguide.sony.net/speaker/7864/v1/en/print.pdfRead 15 October 2026Supported BLUETOOTH standard version 5.3.

Bluetooth codecsiExplicitly supported receive codecs. Bluetooth version alone does not establish codecs.

SBC, AAC, LC36Reviewsoundguys.com/jbl-boombox-4-review-lighter-louder-and-better-than-the-boombox-3-149309Read 8 October 2026How does it connect explicitly lists SBC, AAC and LC3.

SBC, AAC, LDAC1Owner's manualhelpguide.sony.net/speaker/7864/v1/en/print.pdfRead 15 October 2026Guide: SBC, AAC and LDAC for music playback over an A2DP connection. Party Connect forces SBC.

Bluetooth profiles

A2DP 1.4, AVRCP 1.62Maker spec sheet (PDF)support.jbl.com/on/demandware.static/-/Sites-masterCatalog_Harman/default/dw5c227499/pdfs/JBL_Boombox_4_Specsheet_EN.pdfRead 8 October 2026

A2DP, AVRCP1Owner's manualhelpguide.sony.net/speaker/7864/v1/en/print.pdfRead 15 October 2026Guide lists A2DP and AVRCP. The UK EE spec table also lists SPP, which the guide does not, so SPP is left out.

Bluetooth LE AudioiExplicit LE Audio support. Bluetooth LE for app control alone does not qualify.

Yes8Reviewrtings.com/speaker/reviews/jbl/boombox-4Read 8 October 2026Public Videos/Movies text explicitly describes Bluetooth LE Audio and LC3 on compatible Android sources. iOS uses the conventional codec path.

Not available

AuracastiExplicit Auracast support. Sending, receiving and speaker-group roles belong in source notes.

Yes1Maker product pagejbl.com/BOOMBOX-4.htmlRead 8 October 2026Links compatible JBL Auracast speakers. Stereo pairing uses two Boombox 4 speakers.

Not available

MultipointiConcurrent Bluetooth source connections. Pairing memory and speaker-to-speaker linking do not qualify.

Yes9Reviewtechgearlab.com/reviews/audio/bluetooth-speaker/jbl-boombox-4Read 8 October 2026Specifications table explicitly confirms multipoint pairing. Device-count maximum is not stored.

Yes1Owner's manualhelpguide.sony.net/speaker/7864/v1/en/print.pdfRead 15 October 2026Guide describes connecting concurrently with 2 Bluetooth devices. It is not available in Stereo Pair or Party Connect.

Multipoint source devicesiMaximum concurrently connected Bluetooth source devices, not remembered pairings.

Not available

21Owner's manualhelpguide.sony.net/speaker/7864/v1/en/print.pdfRead 15 October 2026Up to 2 Bluetooth devices at once. The speaker remembers up to 8 paired devices but plays from one at a time.

Bluetooth range (claimed)iMaker-claimed Bluetooth range to the source device. Test conditions belong in the source note.

Not available

30m1Owner's manualhelpguide.sony.net/speaker/7864/v1/en/print.pdfRead 15 October 2026Maximum communication range about 30 m (98.4 ft) in line of sight. It shortens with obstacles and 2.4 GHz interference.

Wi-FiiBuilt-in Wi-Fi, for audio streaming, setup or control.

No8Reviewrtings.com/speaker/reviews/jbl/boombox-4Read 8 October 2026

No3Retailer pageabt.com/Sony-ULT-POWER-SOUND-Series-ULT-TOWER-9-Party-Speaker-Bluetooth-in-Black-SRSULT900/p/221687.htmlRead 15 October 2026Quick Specs list Wi-Fi: No. The Sony help guide describes Bluetooth only.

Wi-Fi standardsiOne 802.11 name per item, such as 802.11ax. A Wi-Fi generation is written as its standard, so Wi-Fi 5 is 802.11ac and Wi-Fi 6 is 802.11ax. Older standards are listed only when a source names them.

Not available

Not available

Network audio protocolsiNamed systems that stream audio to the speaker over the home network. AirPlay is written as AirPlay 2. Chromecast built-in is written as Google Cast. Other names follow the maker, such as Spotify Connect.

Not available

Not available

USB audio inputiPlayback from a connected computer or phone through USB. Charging, service ports and USB flash-drive playback do not qualify.

Yes1Maker product pagejbl.com/BOOMBOX-4.htmlRead 8 October 2026

Not available

USB drive playbackiPlayback of audio files on a connected USB storage device.

Not available

Yes1Owner's manualhelpguide.sony.net/speaker/7864/v1/en/print.pdfRead 15 October 2026Guide describes playback from a USB Mass Storage Class device formatted FAT (not exFAT) on the PLAY/CHARGE OUTPUT port. iPhone over USB is not supported. USB audio from a computer is not described.

USB audio file formats

Not available

MP3, WMA, WAV1Owner's manualhelpguide.sony.net/speaker/7864/v1/en/print.pdfRead 15 October 2026Supported audio file formats are MP3, WMA and WAV.

PortsiPhysical speaker connectors. Record charging, audio input, power output and service roles separately. A shared microphone and guitar jack is one port. A combo jack that takes XLR and 6.35 mm plugs is 6.35 mm audio, and the role names XLR. Optical is a TOSLINK digital audio socket.

AJBL Boombox 4

Connector	Count	Role	Version
AC power	1	Mains power and battery charging	Not available
USB-C	1	Lossless digital audio input and power-bank output	USB 2.0

Source3Owner's manualjbl.com/on/demandware.static/-/Sites-masterCatalog_Harman/default/dwf536ac62/pdfs/PA_JBL_Boombox%204_QSG_Global_SOP_V8_Online.pdfRead 8 October 2026LOSSLESS AUDIO PLAYBACK panel identifies USB 2.0. USB-C is also used for power-bank output. Charging panel uses AC power.

BSony ULT TOWER 9

Connector	Count	Role
AC power	1	AC power input
USB-A	1	USB storage playback and charging output for other devices
3.5 mm audio	1	Audio input
6.35 mm audio	1	MIC1 microphone input
6.35 mm audio	1	MIC2 and GUITAR input
Optical (TOSLINK)	1	Optical digital audio input (PCM)

Source1Owner's manualhelpguide.sony.net/speaker/7864/v1/en/print.pdfRead 15 October 2026Parts list: AC input jack, PLAY/CHARGE OUTPUT USB port (Type A in the specifications), AUDIO IN jack (3.5 mm), OPTICAL IN connector (PCM, fs 32/44.1/48/96 kHz), MIC1 jack (6.3 mm) and MIC2/GUITAR jack (6.3 mm). The USB port and the optical, audio and mic jacks sit behind caps. The 6.3 mm connectors are counted as 6.35 mm.

Controls and software

4 of 8 differ

SpeakerphoneiBuilt-in microphone and call support, through a connected phone or a voice assistant's calling. A microphone used only for voice commands does not count. Microphone inputs for karaoke are separate.

No6Reviewsoundguys.com/jbl-boombox-4-review-lighter-louder-and-better-than-the-boombox-3-149309Read 8 October 2026

No3Retailer pageabt.com/Sony-ULT-POWER-SOUND-Series-ULT-TOWER-9-Party-Speaker-Bluetooth-in-Black-SRSULT900/p/221687.htmlRead 15 October 2026Spec table lists Built-In Mic: No. The help guide has no call function. The microphone sensing of Sound Field Optimization is not for calls.

Voice assistantsiVoice assistants explicitly usable through the speaker, such as Amazon Alexa, Google Assistant, Siri or Sonos Voice Control. State whether a connected phone is required.

Not available

Not available

Controls

Power, Bluetooth pairing, Auracast linking, Volume up, Volume down, Play/pause, Next track, Previous track, Bass Boost3Owner's manualjbl.com/on/demandware.static/-/Sites-masterCatalog_Harman/default/dwf536ac62/pdfs/PA_JBL_Boombox%204_QSG_Global_SOP_V8_Online.pdfRead 8 October 2026

Power, ULT sound mode, Bluetooth pairing, Optical input select, TV Sound Booster, Audio input select, USB input select, Party Connect, Stereo Pair, Lighting on and off, Lighting color selectors, Multi color lighting, Volume up and down, Play, pause and skip, Key control, Echo, Guitar mode, Microphone level knob, Microphone and guitar level knob, Battery level and Battery Care1Owner's manualhelpguide.sony.net/speaker/7864/v1/en/print.pdfRead 15 October 2026Parts list: power button, ULT, CHARGE indicator, direct function keys (Bluetooth, OPTICAL IN, TV SOUND BOOSTER, AUDIO IN, USB), MULTI COLOR, CONNECT, STEREO PAIR, lighting color selectors, KEY CONTROL flat and sharp, ECHO, LIGHT, volume minus and plus, play, MIC level knob, MIC and GUITAR level knob, GUITAR button and the BATTERY and BATTERY CARE button behind the rear cap.

Companion app

JBL Portable3Owner's manualjbl.com/on/demandware.static/-/Sites-masterCatalog_Harman/default/dwf536ac62/pdfs/PA_JBL_Boombox%204_QSG_Global_SOP_V8_Online.pdfRead 8 October 2026

Sony | Sound Connect1Owner's manualhelpguide.sony.net/speaker/7864/v1/en/print.pdfRead 15 October 2026Guide: Sony | Sound Connect app for updates, sound settings, equalizer, lighting, TV Sound Booster and party functions.

App platforms

Not available

iOS, Android1Owner's manualhelpguide.sony.net/speaker/7864/v1/en/print.pdfRead 15 October 2026Guide: download from the Google Play store or the App Store.

User firmware updates

Yes3Owner's manualjbl.com/on/demandware.static/-/Sites-masterCatalog_Harman/default/dwf536ac62/pdfs/PA_JBL_Boombox%204_QSG_Global_SOP_V8_Online.pdfRead 8 October 2026APP section documents software upgrades through JBL Portable.

Yes1Owner's manualhelpguide.sony.net/speaker/7864/v1/en/print.pdfRead 15 October 2026Guide has a section on updating the speaker software through the Sony | Sound Connect app.

Built-in lightingiDecorative or ambient lighting. Status, battery, connection and microphone indicator LEDs alone do not qualify.

Yes4Press releasenews.harman.com/releases/jbl-boombox-4-massive-power-iconic-bass-and-a-lighter-buildRead 8 October 2026LED horn logos on passive radiators pulse when Bass Boost is enabled.

Yes1Owner's manualhelpguide.sony.net/speaker/7864/v1/en/print.pdfRead 15 October 2026Guide: the speaker lights up with the music. Lighting is on at purchase.

Lighting modes

Deep Bass: orange logo, Punchy Bass: white logo4Press releasenews.harman.com/releases/jbl-boombox-4-massive-power-iconic-bass-and-a-lighter-buildRead 8 October 2026Deep Bass illuminates logos orange. Punchy Bass illuminates them white.

Multi color, Red, Yellow, Green, Blue, Purple1Owner's manualhelpguide.sony.net/speaker/7864/v1/en/print.pdfRead 15 October 2026Guide: five lighting color selectors (red, yellow, green, blue, purple) and MULTI COLOR for the default multicolor mode. The app has a Lighting Mode function and Party Light functions that are not listed here.

Smart home

None of 3 known

Matter controlleriCan add and control Matter devices. Being a Matter device alone does not count.

Not available

Not available

Thread border routeriConnects Thread smart home devices to the home network.

Not available

Not available

Zigbee hubiA built-in Zigbee radio that controls Zigbee smart home devices.

Not available

Not available

Battery and charging

9 of 17 differ

Built-in battery

Yes2Maker spec sheet (PDF)support.jbl.com/on/demandware.static/-/Sites-masterCatalog_Harman/default/dw5c227499/pdfs/JBL_Boombox_4_Specsheet_EN.pdfRead 8 October 2026

Yes1Owner's manualhelpguide.sony.net/speaker/7864/v1/en/print.pdfRead 15 October 2026Guide: the speaker runs on AC power or on the built-in lithium-ion battery.

Playback time (claimed)iMaximum maker-claimed music playback on one charge in normal playback mode. Battery extension or reduced-bass boost modes belong in battery_life_boost_h. Record volume and lighting conditions in the source note.

28h2Maker spec sheet (PDF)support.jbl.com/on/demandware.static/-/Sites-masterCatalog_Harman/default/dw5c227499/pdfs/JBL_Boombox_4_Specsheet_EN.pdfRead 8 October 2026Up to 28 hours. Depends on volume and audio content.

25h1Owner's manualhelpguide.sony.net/speaker/7864/v1/en/print.pdfRead 15 October 2026Guide: about 25 hours at volume level 18 with ULT1/2 on and lighting off over a Bluetooth connection, not in Battery Care mode. About 12 hours with lighting on at volume 18 and about 2.5 hours at maximum volume 50 with ULT1/2 and lighting on. Measured with a Sony specified music source.

Playback with battery extension (claimed)iTotal claimed runtime with the named battery extension mode enabled. Store the total, not only the extra hours. Keep sound and lighting restrictions in the source note.

34h2Maker spec sheet (PDF)support.jbl.com/on/demandware.static/-/Sites-masterCatalog_Harman/default/dw5c227499/pdfs/JBL_Boombox_4_Specsheet_EN.pdfRead 8 October 202628 hours plus 6 hours with Playtime Boost gives 34 hours total in that mode.6Reviewsoundguys.com/jbl-boombox-4-review-lighter-louder-and-better-than-the-boombox-3-149309Read 8 October 2026Playtime Boost extends runtime by reducing bass. The normal maker runtime and extension-mode total are separate. The maker source supplies the total-hour claim.

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Battery energyiPublished battery pack energy. Do not calculate from an assumed voltage.

99.02Wh2Maker spec sheet (PDF)support.jbl.com/on/demandware.static/-/Sites-masterCatalog_Harman/default/dw5c227499/pdfs/JBL_Boombox_4_Specsheet_EN.pdfRead 8 October 2026

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Battery capacityiPublished pack capacity at the voltage in battery_voltage_v. Do not substitute power-bank output capacity. A figure written per cell, such as 5000mAh*2, is not a pack capacity unless the maker states the pack figure.

4,584mAh2Maker spec sheet (PDF)support.jbl.com/on/demandware.static/-/Sites-masterCatalog_Harman/default/dw5c227499/pdfs/JBL_Boombox_4_Specsheet_EN.pdfRead 8 October 2026

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Nominal battery voltage

21.6V2Maker spec sheet (PDF)support.jbl.com/on/demandware.static/-/Sites-masterCatalog_Harman/default/dw5c227499/pdfs/JBL_Boombox_4_Specsheet_EN.pdfRead 8 October 2026

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Battery chemistry

Lithium-ion2Maker spec sheet (PDF)support.jbl.com/on/demandware.static/-/Sites-masterCatalog_Harman/default/dw5c227499/pdfs/JBL_Boombox_4_Specsheet_EN.pdfRead 8 October 2026

Lithium-ion1Owner's manualhelpguide.sony.net/speaker/7864/v1/en/print.pdfRead 15 October 2026Guide specifications and power section: built-in lithium-ion battery. Capacity in Wh or mAh is not published.

User-replaceable batteryiBattery that the maker documents as replaceable by the user. Service replacement does not qualify.

Yes1Maker product pagejbl.com/BOOMBOX-4.htmlRead 8 October 2026

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Full charge timeiTime from discharged to full under the maker conditions. Adapter rating and simultaneous use belong in source notes.

3h2Maker spec sheet (PDF)support.jbl.com/on/demandware.static/-/Sites-masterCatalog_Harman/default/dw5c227499/pdfs/JBL_Boombox_4_Specsheet_EN.pdfRead 8 October 2026

3h1Owner's manualhelpguide.sony.net/speaker/7864/v1/en/print.pdfRead 15 October 2026Guide: charging completes in about 3 hours from empty to 100 percent with the speaker turned off. Battery Care mode limits the charge to about 90 percent.

Quick charge duration

10min3Owner's manualjbl.com/on/demandware.static/-/Sites-masterCatalog_Harman/default/dwf536ac62/pdfs/PA_JBL_Boombox%204_QSG_Global_SOP_V8_Online.pdfRead 8 October 2026CHARGING panel: 10 minutes charging gives 2.5 hours playback.

10min1Owner's manualhelpguide.sony.net/speaker/7864/v1/en/print.pdfRead 15 October 2026Guide: 10 minutes of charging provides about 180 minutes of music playback.

Playback after quick chargeiClaimed music playback after quick_charge_min of charging. Source conditions apply.

2.5h3Owner's manualjbl.com/on/demandware.static/-/Sites-masterCatalog_Harman/default/dwf536ac62/pdfs/PA_JBL_Boombox%204_QSG_Global_SOP_V8_Online.pdfRead 8 October 2026CHARGING panel: 10 minutes charging gives 2.5 hours playback.

3h1Owner's manualhelpguide.sony.net/speaker/7864/v1/en/print.pdfRead 15 October 2026180 minutes is stored as 3 hours. Conditions are volume level 18, ULT1/2 on and lighting off.

Charging input ratingiPublished speaker input voltage and current. An adapter rating alone does not establish device input.

100-240 V AC, 50/60 Hz2Maker spec sheet (PDF)support.jbl.com/on/demandware.static/-/Sites-masterCatalog_Harman/default/dw5c227499/pdfs/JBL_Boombox_4_Specsheet_EN.pdfRead 8 October 2026

AC 120 V, 60 Hz in North America. AC 120 V to 240 V, 50/60 Hz in other regions1Owner's manualhelpguide.sony.net/speaker/7864/v1/en/print.pdfRead 15 October 2026Specifications, Power: AC 120 V, 60 Hz for North America. AC 120 V to 240 V, 50/60 Hz for other countries and regions. Power consumption is about 153 W and is not a charging figure. The battery charges only from the AC input jack.

Max charging inputiPublished maximum charging input. USB audio power requirements and adapter output are separate.

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USB Power Delivery charging

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Charges other devices

Yes1Maker product pagejbl.com/BOOMBOX-4.htmlRead 8 October 2026

Yes1Owner's manualhelpguide.sony.net/speaker/7864/v1/en/print.pdfRead 15 October 2026Guide: a smartphone or other USB device charges from the PLAY/CHARGE OUTPUT port, also from the battery with no AC connected. It does not work when the battery is low.

Max power-bank outputiPublished power delivered by the speaker to another device. Output voltage and current belong in the source note.

Not available

7.5W1Owner's manualhelpguide.sony.net/speaker/7864/v1/en/print.pdfRead 15 October 2026Specifications, DC OUT: Type A USB port, DC 5 V and MAX 1.5 A. 5 V x 1.5 A is 7.5 W.

Wireless chargingiThe speaker battery can be charged wirelessly. Wireless power output to another device is separate.

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Durability

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Dust and water ratingiExact published IP rating. Keep separate ratings, such as IP68 and IP69, as separate entries.

IP681Maker product pagejbl.com/BOOMBOX-4.htmlRead 8 October 2026

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Floats

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Drop resistanceiExplicit maker claim or defined drop test. Do not infer from rugged wording.

Not available

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Drop test heightiMaker-published tested height. Surface and conditions belong in source notes.

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Carry featuresiPublished handles, straps, carabiners or wheels.

Integrated carry handle6Reviewsoundguys.com/jbl-boombox-4-review-lighter-louder-and-better-than-the-boombox-3-149309Read 8 October 2026

Carry handle, Caster wheels1Owner's manualhelpguide.sony.net/speaker/7864/v1/en/print.pdfRead 15 October 2026Guide: a handle and caster wheels. The wheels work on flat surfaces only. On uneven surfaces two people lift the speaker by the handle.

Measured

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Playback time (measured)iReviewer-measured playback per charge. Volume, lighting, sound mode, firmware and connection belong in the source note.

34.93h7Measurementsoundguys.com/jbl-boombox-4-review-lighter-louder-and-better-than-the-boombox-3-149309Read 8 October 202634 hours 56 minutes, converted to hours. Consistent music samples at 80 dB measured 1 m away. Deep Bass enabled. Firmware 25.29.10, JBL Portable v6.8.30. At this output level the speaker exceeds the maker runtime. Lighting state and Bluetooth codec are not stated.

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Max sound pressure (measured)iReviewer-measured maximum SPL. Distance, test method and power source belong in source notes.

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Low-frequency extension (measured)iReviewer-measured low-frequency limit. Threshold and test method belong in source notes.

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High-frequency extension (measured)iReviewer-measured high-frequency limit. Threshold and test method belong in source notes.

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Audio latency (measured)iReviewer-measured source-to-speaker latency. Source device, app, codec, firmware and connection belong in source notes. App compensation may affect results.

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Full charge time (measured)iReviewer-measured time from empty to full. Power adapter and method belong in the source note.

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Dimensions and weight

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DimensionsiSpeaker body width, height and depth on explicitly identified axes. Unlabeled tuples do not establish axis meanings. Handle, strap and orientation conditions belong in the source note.

Width506.4Height262.9Depth212.9mm(19.9 × 10.4 × 8.4 in)2Maker spec sheet (PDF)support.jbl.com/on/demandware.static/-/Sites-masterCatalog_Harman/default/dw5c227499/pdfs/JBL_Boombox_4_Specsheet_EN.pdfRead 8 October 2026Page 2 explicitly names width x height x depth.

Width410Height910Depth456mm(16.1 × 35.8 × 18 in)1Owner's manualhelpguide.sony.net/speaker/7864/v1/en/print.pdfRead 15 October 2026Specifications: about 410 mm x 910 mm x 456 mm (W x H x D) including projecting parts and controls.

WeightiSpeaker mass including its battery. Excludes packaging, charger and removable carry accessories unless the source states otherwise.

5,890g(13 lb)2Maker spec sheet (PDF)support.jbl.com/on/demandware.static/-/Sites-masterCatalog_Harman/default/dw5c227499/pdfs/JBL_Boombox_4_Specsheet_EN.pdfRead 8 October 2026

29,600g(65.3 lb)1Owner's manualhelpguide.sony.net/speaker/7864/v1/en/print.pdfRead 15 October 2026Specifications: mass about 29.6 kg including battery. Retailers list 65.26 lb. This is far above the peer median because the product is a floor-standing party tower on caster wheels.

Body materials

Post-consumer recycled plastic, Recycled fabric, Plastic handle, Rubber bumpers1Maker product pagejbl.com/BOOMBOX-4.htmlRead 8 October 20266Reviewsoundguys.com/jbl-boombox-4-review-lighter-louder-and-better-than-the-boombox-3-149309Read 8 October 2026Review identifies plastic integrated handle and rubber bumpers. Maker supplies recycled-material facts.

Plastic (partly recycled)3Retailer pageabt.com/Sony-ULT-POWER-SOUND-Series-ULT-TOWER-9-Party-Speaker-Bluetooth-in-Black-SRSULT900/p/221687.htmlRead 15 October 2026Copy of the Sony page says recycled plastic originally developed for Sony is partially used for the body. Other body materials are not published.

Certifications

None of 1 known

FCC IDs

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Other certifications

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In the box

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In the box

JBL Boombox 4, AC power cord, Quick start guide, Safety sheet, Warranty card2Maker spec sheet (PDF)support.jbl.com/on/demandware.static/-/Sites-masterCatalog_Harman/default/dw5c227499/pdfs/JBL_Boombox_4_Specsheet_EN.pdfRead 8 October 2026Power cord plug and quantity vary by region.

ULT TOWER 9 speaker, AC power cord, Optical digital cable, Reference Guide1Owner's manualhelpguide.sony.net/speaker/7864/v1/en/print.pdfRead 15 October 2026Guide names the supplied AC power cord, the supplied optical digital cable and a Reference Guide included with the product.

Links

Not compared

Product page

www.jbl.com/BOOMBOX-4.html1Maker product pagejbl.com/BOOMBOX-4.htmlRead 8 October 2026

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Spec sheet

support.jbl.com/on/demandware.static/-/Sites-masterCatalog_Harman/default/dw5c227499/pdfs/JBL_Boombox_4_Specsheet_EN.pdf1Maker product pagejbl.com/BOOMBOX-4.htmlRead 8 October 2026

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Manual

www.jbl.com/on/demandware.static/-/Sites-masterCatalog_Harman/default/dwf536ac62/pdfs/PA_JBL_Boombox%204_QSG_Global_SOP_V8_Online.pdf1Maker product pagejbl.com/BOOMBOX-4.htmlRead 8 October 2026

helpguide.sony.net/speaker/7864/v1/en/print.pdf1Owner's manualhelpguide.sony.net/speaker/7864/v1/en/print.pdfRead 15 October 2026Sony English help guide for ULT TOWER 9, full print PDF read. Copyright 2025 Sony Corporation, 104 pages.

EPREL registration numberiId in the EU energy label database. Each size or model of a series has its own id, so it is per variant.

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Warranty

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Manufacturer warranty (source market)iThe maker's warranty period for the exact SKU or configuration and market named in the source note. It applies only to that stated market, not every regional variant. Statutory consumer rights are excluded. The base term is stored. An extension that needs registration goes in the source note.

Not available

1year3Retailer pageabt.com/Sony-ULT-POWER-SOUND-Series-ULT-TOWER-9-Party-Speaker-Bluetooth-in-Black-SRSULT900/p/221687.htmlRead 15 October 2026US listing gives a 1 year limited parts warranty and a 1 year limited labor warranty. The UK EE spec table gives 24 months. Other markets are not covered.

Both are also in the API. Back to all wireless speakers.