Speaker
Products
In The Lab
Forums
Newsletters
Join now
Best
Bluetooth Portable Outdoor Loud Home Brands Small Bluetooth For Sound JBL Budget And Cheap Bluetooth For Bass Parties Waterproof Bluetooth Shower Golf Smart Alexa Bluetooth Under $100 Bose Sonos
Tools
Compare Results Table Tool Review List Review Index Graph Review Pipeline Vote Custom Ratings
Popular
JBL Boombox 4 JBL Authentics 500 Bose Lifestyle Ultra Speaker JBL PartyBox On-The-Go Ultimate Ears WONDERBOOM 4 Bose SoundLink Max JBL Charge 6 JBL PartyBox Encore Essential 2 Ultimate Ears EPICBOOM JBL PartyBox 720 Bose SoundLink Flex (2nd Gen) JBL Flip 7 Harman/Kardon Onyx Studio 9 Anker Soundcore Select 4 Go JBL Xtreme 5 Sony SRS-XB100 Ultimate Ears MEGABOOM 4 JBL Boombox 3 JBL PartyBox Stage 320 Sony ULT FIELD 5
203 Speakers bought and tested
Supported by you via membership, and when you purchase through links on our site, we may earn an affiliate commission.
  1. Home
  2. Speaker
  3. Compare

Ultimate Ears MEGABOOM 3 vs Bose SoundLink Flex

Which Speaker Is Better?

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

Products

Ultimate Ears MEGABOOM 3
Bose SoundLink Flex

Tested using Methodology v0.8

Updated Aug 10, 2026 07:06 PM

SEE PRICE
Amazon

Tested using Methodology v0.8

Updated Aug 19, 2026 07:00 PM

SEE PRICE
Bose
Ultimate Ears MEGABOOM 3 Picture

Track

Bose SoundLink Flex Picture

Track

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

Our Verdict

Ultimate Ears MEGABOOM 3

Bose SoundLink Flex

The Ultimate Ears MEGABOOM 3 is a better speaker than the Bose SoundLink Flex, though they have different strengths. The Ultimate Ears offers a wider and more immersive soundstage. Its companion app comes with a graphic EQ and presets to customize its sound to your liking, and it has a longer-lasting battery life, so it's better suited to long listening sessions. However, the Bose is smaller, making it more portable, and it supports voice assistants through your smartphone. It also offers a more balanced sound profile out of the box and can produce a deeper bass. 

GIFT THIS COMPARISON

0 

Variants

  • MEGABOOM 3 (Blue)
  • MEGABOOM 3 (Dusk)
  • SoundLink Flex (Black)
  • SoundLink Flex (Carmine Red)

Review

See Ultimate Ears MEGABOOM 3 Review
See Bose SoundLink Flex Review
3 
0 

Check Price

Blue
MEGABOOM 3
SEE PRICE
Amazon
Black
SoundLink Flex
SEE PRICE
Bose
Dusk
MEGABOOM 3
SEARCH
Amazon
Carmine Red
SoundLink Flex
SEARCH
Amazon
Jungle Grey
MEGABOOM 3
SEE PRICE
Amazon
Chilled Lilac
SoundLink Flex
SEARCH
Amazon
Moon
MEGABOOM 3
SEE PRICE
Amazon
Cypress Green
SoundLink Flex
SEARCH
Amazon
Night Black
MEGABOOM 3
SEE PRICE
Amazon
Stone Blue
SoundLink Flex
SEE PRICE
B&H
Purple
MEGABOOM 3
SEE PRICE
Amazon
White Smoke
SoundLink Flex
SEARCH
Amazon
Sunset Red
MEGABOOM 3
SEE PRICE
Amazon
 

Main Differences for
Music

Threshold 

0.10

Music 
 

0.0
0.0
JOIN NOW  to see main differences

Full Comparison

Design

Style  

Style Photo  

Ultimate Ears MEGABOOM 3 Style Photo Sample

SAMPLE

Join Now

for pictures & test results

Bose SoundLink Flex Style Photo Sample

SAMPLE

Join Now

for pictures & test results

RGB Lights  

Locked
Locked

Portability 
 

N/A
N/A

Dimensions Photo  

Ultimate Ears MEGABOOM 3 Dimensions Photo Sample

SAMPLE

Join Now

for pictures & test results

Bose SoundLink Flex 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  

Ultimate Ears MEGABOOM 3 Build Quality Photo Sample

SAMPLE

Join Now

for pictures & test results

Bose SoundLink Flex 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  

Ultimate Ears MEGABOOM 3 Controls Photo Sample

SAMPLE

Join Now

for pictures & test results

Bose SoundLink Flex Controls Photo Sample

SAMPLE

Join Now

for pictures & test results

Controls Photo 2  

Ultimate Ears MEGABOOM 3 Controls Photo 2 Sample

SAMPLE

Join Now

for pictures & test results

Bose SoundLink Flex 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  

Ultimate Ears MEGABOOM 3 In The Box Photo Sample

SAMPLE

Join Now

for pictures & test results

Bose SoundLink Flex In The Box Photo Sample

SAMPLE

Join Now

for pictures & test results

Sound

Frequency Response Accuracy 
 

N/A
N/A

Frequency Response Graph  

Ultimate Ears MEGABOOM 3 Frequency Response Graph Sample

SAMPLE

Join Now

for pictures & test results

Bose SoundLink Flex 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  

Ultimate Ears MEGABOOM 3 Raw Frequency Response Graph Sample

SAMPLE

Join Now

for pictures & test results

Bose SoundLink Flex Raw Frequency Response Graph Sample

SAMPLE

Join Now

for pictures & test results

Binaural Recording @ 1m 
 

Join Now
Join Now

Binaural Recording @ 2m 
 

Join Now
Join Now

Soundstage 
 

N/A
N/A

Directivity Graph  

Ultimate Ears MEGABOOM 3 Directivity Graph Sample

SAMPLE

Join Now

for pictures & test results

Bose SoundLink Flex Directivity Graph Sample

SAMPLE

Join Now

for pictures & test results

Directivity Index 
 

Lock dB
Lock dB

Stereo 
 

Locked
Locked

Dynamics 
 

N/A
N/A

Dynamic Range Compression  

Ultimate Ears MEGABOOM 3 Dynamic Range Compression Sample

SAMPLE

Join Now

for pictures & test results

Bose SoundLink Flex 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  

Ultimate Ears MEGABOOM 3 App Picture Sample

SAMPLE

Join Now

for pictures & test results

Bose SoundLink Flex 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

Blue
MEGABOOM 3
SEE PRICE
Amazon
Black
SoundLink Flex
SEE PRICE
Bose
Dusk
MEGABOOM 3
SEARCH
Amazon
Carmine Red
SoundLink Flex
SEARCH
Amazon
Jungle Grey
MEGABOOM 3
SEE PRICE
Amazon
Chilled Lilac
SoundLink Flex
SEARCH
Amazon
Moon
MEGABOOM 3
SEE PRICE
Amazon
Cypress Green
SoundLink Flex
SEARCH
Amazon
Night Black
MEGABOOM 3
SEE PRICE
Amazon
Stone Blue
SoundLink Flex
SEE PRICE
B&H
Purple
MEGABOOM 3
SEE PRICE
Amazon
White Smoke
SoundLink Flex
SEARCH
Amazon
Sunset Red
MEGABOOM 3
SEE PRICE
Amazon
 
Back to Top

Ultimate Ears MEGABOOM 3

Bose SoundLink Flex

Comments

  1. Comparison
 • Posted 2 years ago

Ultimate Ears MEGABOOM 3 vs Bose SoundLink Flex: Main Discussion

What do you think of these products? Let us know below.


Looking for a personalized buying advice from the RTINGS.com experts? Members have direct access to buying advice on our member forum.

See All Audio Discussions
 Share
0 
PreviewBack to editorFormat guide
No comments yet, refresh to see new ones
We make money directly from you via Membership (which gives you access to extra features), when you buy RTINGS.com Merch, and when you buy a product after clicking a link to a retailer. Learn more about how we work.
We buy our own products, just like you, mostly from the United States. When a product is discontinued or no longer popular, we sell the review units locally. See what products we currently have for sale.
© 2026 9298-5266 Quebec Inc. All Rights Reserved.