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  1. Home
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Marshall Bromley 750 vs JBL PartyBox 330

Which Speaker Is Better?

    Top
    Main Differences
    Design
      PicturesStylePortabilityBuild QualityControlsIn The Box
    Sound
      Frequency Response AccuracyRaw Frequency ResponseDirectivityLoudness
    Active Features
      BatteryVoice AssistantApp
    Connectivity
      WiredBluetoothWi-Fi
    Comments

Products

Marshall Bromley 750
JBL PartyBox 330

Tested using Methodology v1.0.1

Updated Sep 25, 2026 01:13 PM

SEE PRICE
Amazon

Tested using Methodology v1.0.1

Updated Sep 25, 2026 12:08 AM

SEE PRICE
Amazon
Marshall Bromley 750 Picture

Track

JBL PartyBox 330 Picture

Track

Bluetooth
Yes
Wi-Fi
No
Speakerphone
No
Voice Assistant
No
Battery Powered
Yes
Bluetooth
Yes
Wi-Fi
No
Speakerphone
No
Voice Assistant
No
Battery Powered
Yes

Our Verdict

Marshall Bromley 750

JBL PartyBox 330

The JBL PartyBox 330 and Marshall Bromley 750 are large battery-powered party speakers with different strengths. The JBL is much lighter and easier to move, and its battery lasts a little longer. But the Marshall is much larger and gets considerably louder with very little compression. Its sound also changes less as you move around the speaker, and it has combo XLR/instrument inputs. The JBL has a much brighter sound than the Marshall, which is quite bass-heavy.

GIFT THIS COMPARISON

0 

Variants

  • Bromley 750 (Black and Brass)
  • PartyBox 330 (Black)
  • PartyBox 330 (White)

Review

See Marshall Bromley 750 Review
See JBL PartyBox 330 Review
10 
0 

Check Price

Black and Brass
Bromley 750
SEE PRICE
Amazon
Black
PartyBox 330
SEE PRICE
Amazon
Black and Brass
Bromley 750
SEE PRICE
BestBuy.com
White
PartyBox 330
SEE PRICE
Amazon
Black and Brass
Bromley 750
SEE PRICE
Marshall
 
Black and Brass
Bromley 750
SEE PRICE
B&H
 
Black and Brass
Bromley 750
SEARCH
Walmart.com
 

Main Differences for
Music

Threshold 

0.10

Music 
 

0.0
0.0
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Full Comparison

Design

Style  

Style Photo  

Marshall Bromley 750 Style Photo Sample

SAMPLE

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for pictures & test results

JBL PartyBox 330 Style Photo Sample

SAMPLE

Join Now

for pictures & test results

RGB Lights  

Locked
Locked

Portability 
 

N/A
N/A

Dimensions Photo  

Marshall Bromley 750 Dimensions Photo Sample

SAMPLE

Join Now

for pictures & test results

JBL PartyBox 330 Dimensions Photo Sample

SAMPLE

Join Now

for pictures & test results

Volume 
 

Lock in³ (Lock cm³)
Lock in³ (Lock cm³)

Weight 
 

Lock lbs (Lock kg)
Lock lbs (Lock kg)

Power Source 
 

Locked
Locked

One-Hand Carry 
 

Locked
Locked

Build Quality 
 

N/A
N/A

Build Quality Photo  

Marshall Bromley 750 Build Quality Photo Sample

SAMPLE

Join Now

for pictures & test results

JBL PartyBox 330 Build Quality Photo Sample

SAMPLE

Join Now

for pictures & test results

Material Quality 
 

Locked
Locked

Water Resistance 
 

Locked
Locked

Dust Resistance 
 

Locked
Locked

Impact Resistance 
 

Locked
Locked

Floats In Water 
 

Locked
Locked

Controls 
 

N/A
N/A

Controls Photo  

Marshall Bromley 750 Controls Photo Sample

SAMPLE

Join Now

for pictures & test results

JBL PartyBox 330 Controls Photo Sample

SAMPLE

Join Now

for pictures & test results

Controls Photo 2  

Marshall Bromley 750 Controls Photo 2 Sample

SAMPLE

Join Now

for pictures & test results

JBL PartyBox 330 Controls Photo 2 Sample

SAMPLE

Join Now

for pictures & test results

Ease Of Use 
 

Locked
Locked

Feedback 
 

Locked
Locked

Music Play/Pause 
 

Locked
Locked

Call Answer/End 
 

Locked
Locked

Volume Up/Down 
 

Locked
Locked

Track Next/Previous 
 

Locked
Locked

Microphone On/Off 
 

Locked
Locked

Additional Controls 
 

Locked
Locked

In The Box 
 

In The Box Photo  

Marshall Bromley 750 In The Box Photo Sample

SAMPLE

Join Now

for pictures & test results

JBL PartyBox 330 In The Box Photo Sample

SAMPLE

Join Now

for pictures & test results

Sound

Frequency Response Accuracy 
 

N/A
N/A

Frequency Response Graph  

Marshall Bromley 750 Frequency Response Graph Sample

SAMPLE

Join Now

for pictures & test results

JBL PartyBox 330 Frequency Response Graph Sample

SAMPLE

Join Now

for pictures & test results

Slope 
 

Lock
Lock

Std. Err. 
 

Lock dB
Lock dB

Low-Frequency Extension 
 

Lock Hz
Lock Hz

High-Frequency Extension 
 

Lock kHz
Lock kHz

Raw Frequency Response 
 

Raw Frequency Response Graph  

Marshall Bromley 750 Raw Frequency Response Graph Sample

SAMPLE

Join Now

for pictures & test results

JBL PartyBox 330 Raw Frequency Response Graph Sample

SAMPLE

Join Now

for pictures & test results

Directivity 
 

N/A
N/A

Directivity  

Marshall Bromley 750 Directivity Sample

SAMPLE

Join Now

for pictures & test results

JBL PartyBox 330 Directivity Sample

SAMPLE

Join Now

for pictures & test results

Directivity Graph  

Marshall Bromley 750 Directivity Graph Sample

SAMPLE

Join Now

for pictures & test results

JBL PartyBox 330 Directivity Graph Sample

SAMPLE

Join Now

for pictures & test results

Directivity Index 
 

Lock dB
Lock dB

Stereo 
 

Locked
Locked

Loudness 
 

N/A
N/A

Dynamic Range Compression  

Marshall Bromley 750 Dynamic Range Compression Sample

SAMPLE

Join Now

for pictures & test results

JBL PartyBox 330 Dynamic Range Compression Sample

SAMPLE

Join Now

for pictures & test results

SPL @ Max Volume 
 

Lock dB SPL
Lock dB SPL

DRC @ Max Volume 
 

Lock dB
Lock dB
Active Features

Battery 
 

N/A
N/A

Battery Life 
 

Lock hrs
≈ Lock hrs

Charge Time 
 

Lock hrs
Lock hrs

Power Saving 
 

Locked
Locked

Charging Port 
 

Locked
Locked

Battery Powered 
 

Locked
Locked

Voice Assistant 
 

N/A
N/A

Alexa 
 

Locked
Locked

Google Assistant 
 

Locked
Locked

Speakerphone 
 

Locked
Locked

Siri 
 

Locked
Locked

Voice Assistant 
 

Locked
Locked

Voice Activation 
 

Locked
Locked

Microphone Mute 
 

Locked
Locked

Far-Field Performance 
 

Locked
Locked

Ambient Noise Performance 
 

Locked
Locked

App 
 

N/A
N/A

App Picture  

Marshall Bromley 750 App Picture Sample

SAMPLE

Join Now

for pictures & test results

JBL PartyBox 330 App Picture Sample

SAMPLE

Join Now

for pictures & test results

App Name 
 

Locked
Locked

iOS 
 

Locked
Locked

Android 
 

Locked
Locked

EQ 
 

Locked
Locked

Stereo Pair Mode 
 

Locked
Locked

Party Mode 
 

Locked
Locked

Multi-Room 
 

Locked
Locked
Connectivity

Wired 
 

Aux Input 
 

Locked
Locked

USB Audio 
 

Locked
Locked

Other Ports 
 

Locked
Locked

Bluetooth 
 

N/A
N/A

Bluetooth 
 

Locked
Locked

Bluetooth Version 
 

Locked
Locked

Bluetooth iOS Latency 
 

Lock ms
Lock ms

Bluetooth Android Latency 
 

Lock ms
Lock ms

Bluetooth Range 
 

Lock ft (Lock m)
Lock ft (Lock m)

Multi-Device Pairing 
 

Locked
Locked

Wi-Fi 
 

N/A
N/A

Wi-Fi Version 
 

Locked
Locked

Wi-Fi Frequency Band 
 

Locked
Locked

Wi-Fi 
 

Locked
Locked

Apple AirPlay 
 

Locked
Locked

AirPlay Latency 
 

N/A
N/A

Google Chromecast 
 

Locked
Locked

Chromecast Latency 
 

N/A
N/A

Check Price

Black and Brass
Bromley 750
SEE PRICE
Amazon
Black
PartyBox 330
SEE PRICE
Amazon
Black and Brass
Bromley 750
SEE PRICE
BestBuy.com
White
PartyBox 330
SEE PRICE
Amazon
Black and Brass
Bromley 750
SEE PRICE
Marshall
 
Black and Brass
Bromley 750
SEE PRICE
B&H
 
Black and Brass
Bromley 750
SEARCH
Walmart.com
 
Back to Top

Marshall Bromley 750

JBL PartyBox 330

Comments

  1. Comparison
 • Posted 3 days ago

Marshall Bromley 750 vs JBL PartyBox 330: Main Discussion

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