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Ultimate Ears EPICBOOM vs Marshall Kilburn III

Side-by-Side Comparison

Products

Ultimate Ears EPICBOOM
Marshall Kilburn III

Tested using Methodology v0.8

Updated Aug 08, 2025 05:06 PM

SEE PRICE
Amazon.com

Tested using Methodology v0.8

Updated Aug 04, 2025 01:35 PM

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Amazon.com
Ultimate Ears EPICBOOM Picture
Marshall Kilburn III Picture
  1. Recommended in 7 articles:
  2. Bluetooth
  3. Portable
  4. Outdoor
  5. 4

Our Verdict

Ultimate Ears EPICBOOM

Marshall Kilburn III

The Ultimate Ears EPICBOOM and the Marshall Kilburn III have different strengths, despite being a similar size. The Ultimate Ears will be preferable if you're looking for a more rugged speaker (thanks to its IP67 rating), and it has a better app that lets you connect other Ultimate Ears speakers (depending on the generation). It also has better directivity, though the Marshall is no slouch in this department either. Still, the Marshall is an enticing prospect if you're looking for a more portable speaker, with a longer battery life and Bluetooth multi-device connectivity. It also has a slightly bassier sound that'll bring out the kicks and basslines in genres like EDM and hip-hop

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Variants

  • EPICBOOM (Charcoal Black)
  • EPICBOOM (Cotton White)
  • Kilburn III (Black/Brass)
  • Kilburn III (Cream)

Check Price

Charcoal Black
EPICBOOM
SEE PRICE
Amazon.com
Black/Brass
Kilburn III
SEE PRICE
Amazon.com
Cotton White
EPICBOOM
SEE PRICE
Amazon.com
Cream
Kilburn III
SEE PRICE
Amazon.com

Main Differences for
Music

Threshold 

0.10

Music 

7.4
7.5

Frequency Response Accuracy 
 

7.0
7.2

Full Comparison

Design

Style  

Style Photo  

Ultimate Ears EPICBOOM Style Photo
Marshall Kilburn III Style Photo

RGB Lights  

No
No
Show Text 

Portability 
 

8.9
9.1

Dimensions Photo  

Ultimate Ears EPICBOOM Dimensions Photo
Marshall Kilburn III Dimensions Photo

Volume 
 

283 in³ (4,635 cm³)
418 in³ (6,850 cm³)

Weight 
 

4.4 lbs (2.0 kg)
6.2 lbs (2.8 kg)

Power Source 
 

Battery & USB
AC & Battery

One-Hand Carry 
 

Yes
Yes
Show Text 

Build Quality 
 

9.0
7.9

Build Quality Photo  

Ultimate Ears EPICBOOM Build Quality Photo
Marshall Kilburn III Build Quality Photo

Material Quality 
 

Great
Great

Water Resistance 
 

Submersible (IPx7)
Water-resistant (IPx4)

Dust Resistance 
 

Dust-Proof (IP6x)
Dust-Protected (IP5x)

Impact Resistance 
 

Yes (IK rating unspecified)
No

Floats In Water 
 

Yes
No
Show Text 

Controls 
 

6.9
7.0

Controls Photo  

Ultimate Ears EPICBOOM Controls Photo
Marshall Kilburn III Controls Photo

Controls Photo 2  

Ultimate Ears EPICBOOM Controls Photo 2
Marshall Kilburn III Controls Photo 2

Ease Of Use 
 

Great
Great

Feedback 
 

Good
Great

Music Play/Pause 
 

Yes (Physical)
Yes (Physical)

Call Answer/End 
 

No
No

Volume Up/Down 
 

Yes (Physical)
Yes (Physical)

Track Next/Previous 
 

Yes (Physical)
Yes (Physical)

Microphone On/Off 
 

No
No

Additional Controls 
 

Yes
Yes
Show Text 

In The Box 
 

In The Box Photo  

Ultimate Ears EPICBOOM In The Box Photo
Marshall Kilburn III In The Box Photo
Show Text 
Sound

Frequency Response Accuracy 
 

7.0
7.2

Frequency Response Graph  

See details
See details

Slope 
 

0.69
-0.58

Std. Err. 
 

3.37 dB
3.05 dB

Low-Frequency Extension 
 

55.0 Hz
51.1 Hz

High-Frequency Extension 
 

19.1 kHz
18.8 kHz
Show Text 

Raw Frequency Response 
 

Raw Frequency Response Graph  

See details
See details

Binaural Recording @ 1m 
 

Binaural Recording @ 2m 
 

Soundstage 
 

9.0
8.6

Directivity Graph  

See details
See details

Directivity Index 
 

1.91 dB
2.68 dB

Stereo 
 

Yes
Yes
Show Text 

Dynamics 
 

7.2
7.4

Dynamic Range Compression  

See details
See details

SPL @ Max Volume 
 

93.6 dB SPL
92.8 dB SPL

DRC @ Max Volume 
 

2.84 dB
2.22 dB
Show Text 
Active Features

Battery 
 

9.1
9.1

Battery Life 
 

15.8 hrs
23.8 hrs

Charge Time 
 

2.4 hrs
2.8 hrs

Power Saving 
 

Yes
Yes

Charging Port 
 

USB-C
USB-C

Battery Powered 
 

Yes
Yes
Show Text 

Voice Assistant 
 

0.0
0.0

Alexa 
 

No
No

Google Assistant 
 

No
No

Speakerphone 
 

No
No

Siri 
 

No
No

Voice Assistant 
 

No
No

Voice Activation 
 

No
No

Microphone Mute 
 

No Microphone
No Microphone

Far-Field Performance 
 

No Microphone
No Microphone

Ambient Noise Performance 
 

No Microphone
No Microphone

App 
 

7.9
4.7

App Picture  

Ultimate Ears EPICBOOM App Picture
Marshall Kilburn III App Picture

App Name 
 

Ultimate Ears
Marshall Bluetooth

iOS 
 

Yes
Yes

Android 
 

Yes
Yes

EQ 
 

Graphic + Presets
Graphic + Presets

Stereo Pair Mode 
 

Yes
No

Party Mode 
 

Yes
No

Multi-Room 
 

No
No
Show Text 
Connectivity

Wired 
 

Aux Input 
 

No
Yes

USB Audio 
 

No
No

Other Ports 
 

No
No
Show Text 

Bluetooth 
 

7.5
8.4

Bluetooth 
 

Yes
Yes

Bluetooth Version 
 

5.1
5.3

Bluetooth iOS Latency 
 

112 ms
111 ms

Bluetooth Android Latency 
 

157 ms
124 ms

Bluetooth Range 
 

328.1 ft (100.0 m)
334.6 ft (102.0 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

Check Price

Charcoal Black
EPICBOOM
SEE PRICE
Amazon.com
Black/Brass
Kilburn III
SEE PRICE
Amazon.com
Cotton White
EPICBOOM
SEE PRICE
Amazon.com
Cream
Kilburn III
SEE PRICE
Amazon.com

Ultimate Ears EPICBOOM

Marshall Kilburn III

Comments

  1. Comparison

Ultimate Ears EPICBOOM vs Marshall Kilburn III: Main Discussion

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