JBL Partybox 330 vs Sony ULT Field 7

Last updated: September 26, 2026

These sit in different size classes, so this is not a straight ranking comparison. The JBL Partybox 330 ranks #2 of 40 party speakers by sound quality at $549.95; the Sony ULT Field 7 ranks #43 of 76 boombox speakers by sound quality at $400.

JBL Partybox 330 vs Sony ULT Field 7

What the JBL Partybox 330 does well: A highly complete rolling party speaker: removable battery, telescoping handle and wheels, light show, Auracast, USB-C lossless and optical inputs, plus dual mic/guitar inputs. Watch for: It remains very large and heavy, and the sound improvement over the JBL Partybox Stage 320 is modest rather than transformational.

The case for the Sony ULT Field 7: Sony ULT Field 7 uses 2x 114mm x 114mm X-Balanced woofers + 2x 46mm (1.9”) tweeters. The tradeoff: Bass is limited by its ~52Hz specification.

Buy the JBL Partybox 330 at $549.95 for a party speaker, or the Sony ULT Field 7 at $400 for a boombox speaker instead.

There is a real battery-life gap here: the Sony ULT Field 7 is rated for 30 hours, the JBL Partybox 330 only 18 hours.

Water resistance is not close: the Sony ULT Field 7 is rated at IP67 (brief submersion), well ahead of the JBL Partybox 330 at IPX4 (splashing).

Want more options? Browse the full Portable Bluetooth rankings.

Buy the JBL Partybox 330 at Amazon ($549.95) →Buy the Sony ULT Field 7 at Amazon ($400) →

Specifications Side By Side

JBL Partybox 330 Sony ULT Field 7
Price$549.95$400
Ranked#2 of 40 in Party Size Portable Bluetooth Speakers#43 of 76 in Boombox Size Portable Bluetooth Speakers
AppYesNo
Aux InputYesYes
Battery Life18 hours (Manufacturer specified)30 hours (Manufacturer specified)
Bluetooth CodecsSBCSBC, AAC, LDAC
Bluetooth Version6.05.2
Charging Time3 hours-
Drivers2x 6.5” (165mm) woofers + 2x 1” (25mm) PEN dome tweeters2x 114mm x 114mm X-Balanced woofers + 2x 46mm (1.9”) tweeters
EQYes (Smart EQ mode)Yes (App + ULT button)
Guitar InputYesYes
IP RatingIPX4IP67
Microphone InputYes (Karaoke mode with echo effect)Yes (Karaoke mode with echo effect)
InputsOptical-
Party ModeYes (Auracast)Yes (Party Connect up to 100 speakers)
Power BankYes (USB-C, 5V/1A)Yes (USB-A, 5V/1.5A)
Power InputAC Power cordAC Power cord
Removable BatteryYes-
StereoPartiallyYes
OmnidirectionalNoNo
TWSYesYes
USB PlaybackYesYes
Weight37.7 lbs (17.1 kg)13.9 lbs (6.3 kg)
Amplifier Power280W100W
Digital Aux InputNoNo
LightsYes-
WheelsYes-
Dimensions26.1”H x 13.1”W x 14.8”D (662.5 x 334 x 375 mm)20.2” x 8.8” x 8.7” (512 x 224 x 222 mm)
StrapNoNo
Bass Extension (-10dB)-~52Hz
Built-in Microphone-Yes
Buy the JBL Partybox 330 at Amazon ($549.95) →Buy the Sony ULT Field 7 at Amazon ($400) →

More top alternatives to JBL Partybox 330:

Prices on this page were last checked September 26, 2026 at 11:14 PM UTC. Product prices and availability are accurate as of that date/time and are subject to change; the price and availability shown on Amazon at the time of purchase will apply to the purchase of this product.

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The Two Speakers In Full

JBL Partybox 330: $549.95 Amazon B&H Photo Video eBay

JBL Partybox 330 ranking card

Pros: A highly complete rolling party speaker: removable battery, telescoping handle and wheels, light show, Auracast, USB-C lossless and optical inputs, plus dual mic/guitar inputs. It supplies a little more power than the JBL Partybox 310 and JBL Partybox Stage 320, while reviewers report better midrange clarity than the older JBL Partybox 310 and the same deep party-speaker bass.

Cons: It remains very large and heavy, and the sound improvement over the JBL Partybox Stage 320 is modest rather than transformational. JBL removed the dedicated mic gain/control knobs found on earlier models, a real drawback for frequent karaoke use. Do not upgrade from a JBL Partybox 310 or JBL Partybox Stage 320 just for the higher watt figure.

Full JBL Partybox 330 review and specifications →

Amplifier Power280W
AppYes
Aux InputYes
Battery Life18 hours (Manufacturer specified)
Bluetooth CodecsSBC
Bluetooth Version6.0
Charging Time3 hours
Digital Aux InputNo
Dimensions26.1”H x 13.1”W x 14.8”D (662.5 x 334 x 375 mm)
Drivers2x 6.5” (165mm) woofers + 2x 1” (25mm) PEN dome tweeters
EQYes (Smart EQ mode)
Guitar InputYes
IP RatingIPX4
InputsOptical
LightsYes
Microphone InputYes (Karaoke mode with echo effect)
OmnidirectionalNo
Party ModeYes (Auracast)
Power BankYes (USB-C, 5V/1A)
Power InputAC Power cord
Removable BatteryYes
StereoPartially
StrapNo
TWSYes
USB PlaybackYes
Weight37.7 lbs (17.1 kg)
WheelsYes
Check current price at Amazon ($549.95) →Check current price at B&H Photo Video →Search eBay for JBL Partybox 330 →

Sony ULT Field 7: $400 Amazon eBay

Sony ULT Field 7 ranking card

Older model: the Sony SRS-XG500 (rated 3/5).

Pros: Sony ULT Field 7 uses 2x 114mm x 114mm X-Balanced woofers + 2x 46mm (1.9”) tweeters. Its 6.3 kg, claimed 30 hours (Manufacturer specified) battery life, IP67 protection, aux input and stereo playback make it a practical option for its intended room or portable use. Measured bass extension of ~52Hz (-10dB).

Cons: Bass is limited by its ~52Hz specification. There is no companion app. A peak around 8kHz, and bass does not reach as deep as the top-ranked speakers.

Full Sony ULT Field 7 review and specifications →

Amplifier Power100W
AppNo
Aux InputYes
Bass Extension (-10dB)~52Hz
Battery Life30 hours (Manufacturer specified)
Bluetooth CodecsSBC, AAC, LDAC
Bluetooth Version5.2
Built-in MicrophoneYes
Digital Aux InputNo
Dimensions20.2” x 8.8” x 8.7” (512 x 224 x 222 mm)
Drivers2x 114mm x 114mm X-Balanced woofers + 2x 46mm (1.9”) tweeters
EQYes (App + ULT button)
Guitar InputYes
IP RatingIP67
Microphone InputYes (Karaoke mode with echo effect)
OmnidirectionalNo
Party ModeYes (Party Connect up to 100 speakers)
Power BankYes (USB-A, 5V/1.5A)
Power InputAC Power cord
StereoYes
StrapNo
TWSYes
USB PlaybackYes
Weight13.9 lbs (6.3 kg)
Check current price at Amazon ($400) →Search eBay for Sony ULT Field 7 →