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  1. Table of Contents
  2. Top
  3. Main Differences
  4. Design
    1. Pictures
    2. Style
    3. Portability
    4. Build Quality
    5. Controls
    6. In The Box
  5. Sound
    1. Frequency Response Accuracy
    2. Raw Frequency Response
    3. Soundstage
    4. Dynamics
  6. Active Features
    1. Battery
    2. Voice Assistant
    3. App
  7. Connectivity
    1. Wired
    2. Bluetooth
    3. Wi-Fi
  8. Comments

Ultimate Ears MEGABOOM 3 vs Bose SoundLink Flex

Side-by-Side Comparison

Products

Ultimate Ears MEGABOOM 3
Bose SoundLink Flex

Tested using Methodology v0.8

Updated Oct 24, 2024 02:14 PM

SEE PRICE
Amazon.com

Tested using Methodology v0.8

Updated Oct 31, 2024 02:49 PM

SEE PRICE
Amazon.com
Ultimate Ears MEGABOOM 3 Picture
Bose SoundLink Flex Picture

Variants

  • MEGABOOM 3 (Blue)
  • MEGABOOM 3 (Dusk)
  • MEGABOOM 3 (Jungle Grey)
  • MEGABOOM 3 (Moon)
  • MEGABOOM 3 (Night Black)
  • MEGABOOM 3 (Purple)
  • MEGABOOM 3 (Sunset Red)
  • SoundLink Flex (Black)
  • SoundLink Flex (Carmine Red)
  • SoundLink Flex (Chilled Lilac)
  • SoundLink Flex (Cypress Green)
  • SoundLink Flex (Stone Blue)
  • SoundLink Flex (White Smoke)

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. 

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Black
SoundLink Flex
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Carmine Red
SoundLink Flex
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Jungle Grey
MEGABOOM 3
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Chilled Lilac
SoundLink Flex
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Cypress Green
SoundLink Flex
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Night Black
MEGABOOM 3
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Stone Blue
SoundLink Flex
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Purple
MEGABOOM 3
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White Smoke
SoundLink Flex
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Sunset Red
MEGABOOM 3
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Main Differences for

Threshold 

0.10

Music 

7.0
6.3

Soundstage 
 

9.1
5.5

Frequency Response Accuracy 
 

6.3
6.9

EQ 
 

Graphic + Presets
No

Full Comparison

Design

Style  

Style Photo  

Ultimate Ears MEGABOOM 3 Style Photo
Bose SoundLink Flex Style Photo

RGB Lights  

No
No

Show text

Portability 
 

9.1
9.2

Dimensions Photo  

Ultimate Ears MEGABOOM 3 Dimensions Photo
Bose SoundLink Flex Dimensions Photo

Volume 
 

104 in³ (1,710 cm³)
57 in³ (942 cm³)

Weight 
 

2.0 lbs (0.9 kg)
1.3 lbs (0.6 kg)

Power Source 
 

Battery & USB
Battery & USB

One-Hand Carry 
 

Yes
Yes

Show text

Build Quality 
 

9.0
8.7

Build Quality Photo  

Ultimate Ears MEGABOOM 3 Build Quality Photo
Bose SoundLink Flex Build Quality Photo

Material Quality 
 

Great
Good

Water Resistance 
 

Submersible (IPx7)
Submersible (IPx7)

Dust Resistance 
 

Dust-Proof (IP6x)
Dust-Proof (IP6x)

Impact Resistance 
 

Yes (IK rating unspecified)
Yes (IK rating unspecified)

Floats In Water 
 

Yes
Yes

Show text

Controls 
 

5.8
8.4

Controls Photo  

Ultimate Ears MEGABOOM 3 Controls Photo
Bose SoundLink Flex Controls Photo

Controls Photo 2  

Ultimate Ears MEGABOOM 3 Controls Photo 2
Bose SoundLink Flex Controls Photo 2

Ease Of Use 
 

Good
Okay

Feedback 
 

Good
Decent

Music Play/Pause 
 

Yes (Physical)
Yes (Physical)

Call Answer/End 
 

No
Yes (Physical)

Volume Up/Down 
 

Yes (Physical)
Yes (Physical)

Track Next/Previous 
 

No
Yes (Physical)

Microphone On/Off 
 

No
Yes (Physical)

Additional Controls 
 

Yes
Yes

Show text

In The Box 
 

In The Box Photo  

Ultimate Ears MEGABOOM 3 In The Box Photo
Bose SoundLink Flex In The Box Photo

Show text

Sound

Frequency Response Accuracy 
 

6.3
6.9

Frequency Response Graph  

See details on graph tool
See details on graph tool

Slope 
 

-1.13
0.22

Std. Err. 
 

4.07 dB
2.85 dB

Low-Frequency Extension 
 

72.3 Hz
60.8 Hz

High-Frequency Extension 
 

18.2 kHz
15.6 kHz

Show text

Raw Frequency Response 
 

Raw Frequency Response Graph  

See details on graph tool
See details on graph tool

Binaural Recording @ 1m 
 

Binaural Recording @ 2m 
 

Soundstage 
 

9.1
5.5

Directivity Graph  

See details on graph tool
See details on graph tool

Directivity Index 
 

1.74 dB
4.59 dB

Stereo 
 

Yes
No (mono)

Show text

Dynamics 
 

6.8
6.4

Dynamic Range Compression  

See details on graph tool
See details on graph tool

SPL @ Max Volume 
 

89.9 dB SPL
87.5 dB SPL

DRC @ Max Volume 
 

2.91 dB
3.02 dB

Show text

Active Features

Battery 
 

9.0
6.7

Battery Life 
 

17.7 hrs
7.2 hrs

Charge Time 
 

2.5 hrs
2.7 hrs

Power Saving 
 

Yes
Yes

Charging Port 
 

Micro-USB
USB-C

Battery Powered 
 

Yes
Yes

Show text

Voice Assistant 
 

0.0
5.7

Alexa 
 

No
No

Google Assistant 
 

No
Yes (Requires Smartphone)

Speakerphone 
 

No
Yes

Siri 
 

No
Yes (Requires Smartphone)

Voice Assistant 
 

No
Yes

Voice Activation 
 

No
No

Microphone Mute 
 

No Microphone
No

Far-Field Performance 
 

No Microphone
Excellent

Ambient Noise Performance 
 

No Microphone
Excellent

Show text

App 
 

7.9
6.6

App Picture  

Ultimate Ears MEGABOOM 3 App Picture
Bose SoundLink Flex App Picture

App Name 
 

Ultimate Ears
Bose Connect

iOS 
 

Yes
Yes

Android 
 

Yes
Yes

EQ 
 

Graphic + Presets
No

Stereo Pair Mode 
 

Yes
Yes

Party Mode 
 

Yes
Yes

Multi-Room 
 

No
No

Show text

Connectivity

Wired 
 

Aux Input 
 

No
No

USB Audio 
 

No
No

Other Ports 
 

No
No

Show text

Bluetooth 
 

7.6
8.0

Bluetooth 
 

Yes
Yes

Bluetooth Version 
 

Unspecified
4.2

Bluetooth iOS Latency 
 

181 ms
236 ms

Bluetooth Android Latency 
 

71 ms
109 ms

Bluetooth Range 
 

282.2 ft (86.0 m)
255.9 ft (78.0 m)

Multi-Device Pairing 
 

No
2 Devices

Show text

Wi-Fi 
 

0.0
0.0

Wi-Fi Version 
 

No Wi-Fi
No Wi-Fi

Wi-Fi Frequency Band 
 

No Wi-Fi
No Wi-Fi

Wi-Fi 
 

No
No

Apple AirPlay 
 

No
No

AirPlay Latency 
 

N/A
N/A

Google Chromecast 
 

No
No

Chromecast Latency 
 

N/A
N/A

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Black
SoundLink Flex
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Carmine Red
SoundLink Flex
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Jungle Grey
MEGABOOM 3
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Chilled Lilac
SoundLink Flex
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Cypress Green
SoundLink Flex
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Night Black
MEGABOOM 3
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Stone Blue
SoundLink Flex
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Purple
MEGABOOM 3
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White Smoke
SoundLink Flex
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Sunset Red
MEGABOOM 3
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Ultimate Ears MEGABOOM 3

Bose SoundLink Flex

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Ultimate Ears MEGABOOM 3 vs Bose SoundLink Flex: Main Discussion

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