JBL Partybox 330 vs Sony ULT Tower 9

Last updated: August 20, 2026

These sit in different size classes, so this is not a straight ranking comparison. The JBL Partybox 330 ranks #1 of 50 party speakers by sound quality at $629.95; the Sony ULT Tower 9 ranks #8 of 11 large party speakers by sound quality at $800.

What the JBL Partybox 330 gets right: Handle and wheels are convenient. The tradeoff: Sound quality is nearly identical to the 310 and Stage 320 despite the power bump, so probably not worth an upgrade if you already own either of those.

What the Sony ULT Tower 9 offers: Slightly better sounding than the ULT Tower 10. Set against that: Not as deep of bass and loses more bass at high volume even compared to the lower end Partybox speakers.

Buy the JBL Partybox 330 at $629.95 if you want a party speaker. Buy the Sony ULT Tower 9 at $800 if you want a large party speaker instead.

If water resistance matters to you, the JBL Partybox 330 at IPX4 (splashing) holds up far better than the Sony ULT Tower 9 at no water resistance.

JBL Partybox 330 vs Sony ULT Tower 9

Specifications Side By Side

JBL Partybox 330 Sony ULT Tower 9
Price$629.95$800
Ranked#1 of 50 in Party Size Portable Bluetooth Speakers#8 of 11 in Large Party Size Portable Bluetooth Speakers
AppYesYes
Aux InputYesYes
Battery Life18 hours (Manufacturer specified)25 hours (Manufacturer specified)
Bluetooth CodecsSBCSBC, AAC, LDAC
Bluetooth Version6.05.3
Charging Time3 hours-
Drivers2x 6.5" (165mm) woofers + 2x 1" (25mm) PEN dome tweeters7 drivers: 1x 12.6"x12.6" woofer, 2x 4.7" midrange, 2x 2" tweeter, 2x 1.6" rear tweeter
EQYes (Smart EQ mode)Yes (10 band)
Guitar InputYesYes
IP RatingIPX4None
Microphone InputYes (Karaoke mode with echo effect)Yes (Karaoke mode with echo effect)
Optical InputYes-
Party ModeYes (Auracast)Yes (Auracast up to 100 speakers)
Power BankYes (USB-C, 5V/1A)Yes (USB-A, 5V/1.5A)
Power InputAC Power cordAC Power cord
Removable BatteryYesNo
StereoPartiallyYes
OmnidirectionalNoNo
TWSYesYes
USB PlaybackYesYes
Weight37.7 lbs / 17.1 kg65.3 lbs / 29.6 kg
Output Power280W148W
Digital Aux InputNoNo
Built in Microphone-No
Wifi-No
Dimensions-16.1" x 35.8" x 18" (410 x 910 x 456 mm)

More useful head-to-heads from the same speaker class:

The Two Speakers In Full

JBL Partybox 330: $629.95 Amazon Bhphotovideo

JBL Partybox 330 ranking card

Pros: Handle and wheels are convenient. Customizable lightshow. Removable battery. Slightly more power than the 310 and Stage 320 (280W vs 240W). Adds an optical TV input and USB-C lossless playback, plus dual mic and guitar inputs for karaoke and live sets.

Cons: Sound quality is nearly identical to the 310 and Stage 320 despite the power bump, so probably not worth an upgrade if you already own either of those. Removed the dedicated mic gain and microphone control knobs found on the 310/320. Some people don’t like the new lightshow design. Very large. Note, JBL daisychain is not compatible with any other non-JBL speaker and is possibly a fully digital signal.

AppYes
Aux InputYes
Battery Life18 hours (Manufacturer specified)
Bluetooth CodecsSBC
Bluetooth Version6.0
Charging Time3 hours
Digital Aux InputNo
Drivers2x 6.5" (165mm) woofers + 2x 1" (25mm) PEN dome tweeters
EQYes (Smart EQ mode)
Guitar InputYes
IP RatingIPX4
Microphone InputYes (Karaoke mode with echo effect)
OmnidirectionalNo
Optical InputYes
Output Power280W
Party ModeYes (Auracast)
Power BankYes (USB-C, 5V/1A)
Power InputAC Power cord
Removable BatteryYes
StereoPartially
TWSYes
USB PlaybackYes
Weight37.7 lbs / 17.1 kg

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Sony ULT Tower 9: $800 Amazon

Sony ULT Tower 9 ranking card

Pros: Slightly better sounding than the ULT Tower 10

Cons: Not as deep of bass and loses more bass at high volume even compared to the lower end Partybox speakers. Bass drops off a lot at higher volumes. Not quite as loud as the ULT Tower 10

AppYes
Aux InputYes
Battery Life25 hours (Manufacturer specified)
Bluetooth CodecsSBC, AAC, LDAC
Bluetooth Version5.3
Built in MicrophoneNo
Digital Aux InputNo
Dimensions16.1" x 35.8" x 18" (410 x 910 x 456 mm)
Drivers7 drivers: 1x 12.6"x12.6" woofer, 2x 4.7" midrange, 2x 2" tweeter, 2x 1.6" rear tweeter
EQYes (10 band)
Guitar InputYes
IP RatingNone
Microphone InputYes (Karaoke mode with echo effect)
OmnidirectionalNo
Output Power148W
Party ModeYes (Auracast up to 100 speakers)
Power BankYes (USB-A, 5V/1.5A)
Power InputAC Power cord
Removable BatteryNo
StereoYes
TWSYes
USB PlaybackYes
Weight65.3 lbs / 29.6 kg
WifiNo

As an eBay Partner, we may be compensated if you make a purchase.