JBL Partybox 330 vs Marshall Bromley 750

Last updated: October 1, 2026

Short answer: the Marshall Bromley 750 for off-axis consistency, the JBL Partybox 330 for bass. The Marshall has much wider, more consistent off-axis dispersion than the JBL Partybox 720, which only fires forward, though its bass is not as deep as a Partybox 330 or 720. The 330 has a convenient handle and wheels, but its sound is nearly identical to the 310 and Stage 320 despite the power bump.

JBL Partybox 330 vs Marshall Bromley 750

Buy the JBL Partybox 330 at $629.95 for a party speaker, or the Marshall Bromley 750 at $999.95 for a large party speaker instead.

Battery life favors the Marshall Bromley 750: rated for 40 hours against 18 hours for the JBL Partybox 330.

Still deciding? The full Portable Bluetooth rankings cover every ranked option.

Check JBL Partybox 330 price at Amazon ($629.95) →Check Marshall Bromley 750 price at Amazon ($999.95) →

Specifications Side By Side

JBL Partybox 330 Marshall Bromley 750
Price$629.95$999.95
Ranked#2 of 44 in Party Size Portable Bluetooth Speakers#13 of 13 in Large Party Size Portable Bluetooth Speakers
AppYesYes (Marshall Bluetooth app)
Aux InputYesYes (3.5mm, RCA)
Battery Life18 hours (Manufacturer specified)40+ hours (Manufacturer specified)
BluetoothYesYes
Bluetooth CodecsSBCSBC, AAC, LC3
Bluetooth Version6.05.3
Charging Time3 hours3.5 hours
Drivers2x 6.5” (165mm) woofers + 2x 1” (25mm) PEN dome tweeters2x 10” woofers, 2x 5.25” mid-ranges, 2x 1” tweeters, 2x 0.8” tweeters
EQYes (Smart EQ mode)Yes
Guitar InputYesYes
IP RatingIPX4IP54
Microphone InputYes (Karaoke mode with echo effect)Yes (2x XLR/6.35mm combo)
InputsOptical-
Party ModeYes (Auracast)Yes (Auracast)
Power BankYes (USB-C, 5V/1A)Yes (USB-C)
Power InputAC Power cordUSB-C
Removable BatteryYesYes
StereoPartiallyYes
OmnidirectionalNoYes
TWSYesNo
USB PlaybackYesNo
Weight37.7 lbs (17.1 kg)52.7 lbs (23.9 kg)
Amplifier Power280W400W
Digital Aux InputNoYes (USB-C)
LightsYesYes
WheelsYes-
Dimensions26.1”H x 13.1”W x 14.8”D (662.5 x 334 x 375 mm)16.3” x 25.7” x 14” (413 x 652 x 355 mm)
StrapNoNo
XLR Input-Yes (2x combo)
Built-in Microphone-No
Wi-Fi-No
Frequency Response-20Hz - 20kHz (Manufacturer specified)
Check JBL Partybox 330 price at Amazon ($629.95) →Check Marshall Bromley 750 price at Amazon ($999.95) →

More worthwhile head-to-heads for JBL Partybox 330:

Prices on this page were last checked October 4, 2026 at 9:58 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.

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

The Two Speakers In Full

JBL Partybox 330: $629.95 Amazon B&H Photo Video eBay

JBL Partybox 330 ranking card

Older models: the JBL Partybox Stage 320 (ranked lower, rated 4.6/5), the JBL Partybox 310 (ranked lower, rated 4.5/5) and the JBL Partybox 300 (ranked lower, rated 4.3/5).

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.

Featured on:

Full JBL Partybox 330 review and specifications →

Amplifier Power280W
AppYes
Aux InputYes
Battery Life18 hours (Manufacturer specified)
BluetoothYes
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 ($629.95) →Check current price at B&H Photo Video →Search eBay for JBL Partybox 330 →

Marshall Bromley 750: $999.95 Amazon eBay

Marshall Bromley 750 ranking card

Pros: Much wider, more consistent off-axis dispersion than the JBL Partybox 720, which only fires forward: the Marshall’s standout feature, sounding about the same from any angle.

Cons: Not as deep bass as the JBL Partybox 330 or JBL Partybox 720. Not a great frequency response overall, with some midrange peaks. Only basic bass/treble controls, no full custom EQ like the JBL Partybox 720’s app. Default bass (dynamic mode) is overdone out of the box and needs trimming.

Full Marshall Bromley 750 review and specifications →

Amplifier Power400W
AppYes (Marshall Bluetooth app)
Aux InputYes (3.5mm, RCA)
Battery Life40+ hours (Manufacturer specified)
BluetoothYes
Bluetooth CodecsSBC, AAC, LC3
Bluetooth Version5.3
Built-in MicrophoneNo
Charging Time3.5 hours
Digital Aux InputYes (USB-C)
Dimensions16.3” x 25.7” x 14” (413 x 652 x 355 mm)
Drivers2x 10” woofers, 2x 5.25” mid-ranges, 2x 1” tweeters, 2x 0.8” tweeters
EQYes
Frequency Response20Hz - 20kHz (Manufacturer specified)
Guitar InputYes
IP RatingIP54
LightsYes
Microphone InputYes (2x XLR/6.35mm combo)
OmnidirectionalYes
Party ModeYes (Auracast)
Power BankYes (USB-C)
Power InputUSB-C
Removable BatteryYes
StereoYes
StrapNo
TWSNo
USB PlaybackNo
Weight52.7 lbs (23.9 kg)
Wi-FiNo
XLR InputYes (2x combo)
Check current price at Amazon ($999.95) →Search eBay for Marshall Bromley 750 →