Products
Technics EAH-AZ100
Bose QuietComfort Ultra Earbuds (2nd Gen)
Tested using Methodology v2.0
Updated Oct 10, 2025 03:10 AM
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Amazon.com
Tested using Methodology v2.0
Updated Oct 14, 2025 07:30 PM
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Amazon.com
TypeIn-ear
Noise CancellingYes
EnclosureClosed-Back
Bass Amount
Very Emphasized (5 dB)
WirelessTruly Wireless
TransducerDynamic
Treble Amount
Slightly Underemphasized (-3 dB)
MicYes
Sound Signature
Warm
TypeEarbuds
Noise CancellingYes
EnclosureClosed-Back
Bass Amount
Very Emphasized (5 dB)
WirelessTruly Wireless
TransducerDynamic
Treble Amount
Balanced (0 dB)
MicYes
Sound Signature
Warm
Our Verdict
Technics EAH-AZ100
Bose QuietComfort Ultra Earbuds (2nd Gen)
The Technics EAH-AZ100 and the Bose QuietComfort Ultra Earbuds (2nd Gen) are similar flagship earbuds. Both have a warm sound signature, but they differ in their upper-frequency reproduction. The Technics have an underemphasized treble relative to the Bose, with softer articulation and more understated brightness. In terms of noise isolation, both earbuds perform exceptionally, easily attenuating anything from a semi's engine to the clattering of dishes. That said, the Technics can sustain this attenuation for longer, as their continuous battery life is nearly double that of the Bose.
Variants
- EAH-AZ100 (Black)
- EAH-AZ100 (Silver)
- QuietComfort Ultra Earbuds (2nd Gen) (Black)
- QuietComfort Ultra Earbuds (2nd Gen) (Deep Plum)
- QuietComfort Ultra Earbuds (2nd Gen) (White Smoke)
Check Price
Black
EAH-AZ100
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BestBuy.com
Black
QuietComfort Ultra Earbuds (2nd Gen)
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Amazon.com
Silver
EAH-AZ100
SEE PRICE
Amazon.com
Deep Plum
QuietComfort Ultra Earbuds (2nd Gen)
SEARCH
Amazon.com
White Smoke
QuietComfort Ultra Earbuds (2nd Gen)
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Amazon.com
Main Differences for
Sports And Fitness
Sports And Fitness
Threshold
Sports And Fitness
8.0
8.1
Comfort
7.5
8.0
Full Comparison
Sound
Sound Profile
Sound Profile
Normalization Frequency
600 Hz
1,300 Hz
Bass Amount
Very Emphasized (5 dB)
Very Emphasized (5 dB)
Treble Amount
Slightly Underemphasized (-3 dB)
Balanced (0 dB)
Sound Signature
Warm
Warm
Frequency Response Consistency
8.9
8.0
Consistency L
Consistency R
Std. Deviation
0.47 dB
0.86 dB
Bass Profile: Target Compliance
7.6
7.8
Bass Profile: Target Compliance
RMS Deviation From Target
5.1 dB
4.9 dB
Low-Frequency Extension
20 Hz
20 Hz
Low Bass
5.19 dB
5.8 dB
Mid Bass
5.31 dB
4.92 dB
High Bass
4.75 dB
2.83 dB
Mid-Range Profile: Target Compliance
8.3
9.3
Mid-Range Profile: Target Compliance
RMS Deviation From Target
2.27 dB
1.11 dB
Low Mid
2.8 dB
1.21 dB
Mid-Mid
-0.63 dB
-0.35 dB
High Mid
-1.98 dB
0.89 dB
Treble Profile: Target Compliance
7.2
9.0
Treble Profile: Target Compliance
RMS Deviation From Target
4.06 dB
2.51 dB
Low Treble
-4.22 dB
1.03 dB
Mid Treble
-2.5 dB
-1.66 dB
High Treble
-0.54 dB
-7.91 dB
Peaks/Dips
8.5
7.0
Peaks/Dips Graph
Peaks
0.87 dB
1.87 dB
Dips
1.34 dB
1.77 dB
Stereo Mismatch
8.9
8.2
Frequency Response Mismatch
Phase Response Mismatch
Weighted Amplitude Mismatch
0.12 dB
0.31 dB
Weighted Frequency Response Mismatch
0.65 dB
1.08 dB
Weighted Phase Mismatch
0.9°
1.3°
Cumulative Spectral Decay
CSD
PRTF
0.0
0.0
PRTF
PRTF Accuracy (RMS Deviation)
N/A
N/A
PRTF Size (Avg.)
N/A
N/A
PRTF Distance
N/A
N/A
Harmonic Distortion
9.6
9.3
Harmonics Levels
THD Ratio
WHD @ 94 dB SPL
0.06%
0.08%
WHD @ 104 dB SPL
0.06%
0.11%
Electrical Aspects
Impedance
Sensitivity @1kHz-1V
N/A
N/A
Bluetooth Max SPL
102.2 dB
106.1 dB
Virtual Soundstage
2.9
3.3
Virtual Soundstage
Head Modeling
No
No
Speaker Modeling
On/Off
On/Off
Room Ambience
No
No
Head Tracking
On/Off
Adjustable
Virtual Surround
Spatial Audio
Immersive Audio
Test Settings
Firmware
JNZ1ZD 1.030
4.9.30
Power
On
On
Connection
Bluetooth
Bluetooth
Codec
SBC, 16-bit, 48kHz
SBC, 16-bit, 48kHz
Test Instrument
Audio Precision APx517B
Audio Precision APx517B
EQ
Direct
No EQ
ANC
Max
Quiet
Tip/Pad
Silicone (small)
Silicone (small)
Microphone
Integrated
Integrated
Design
Style
Design Picture 2
Type
In-ear
Earbuds
Enclosure
Closed-Back
Closed-Back
Wireless
Truly Wireless
Truly Wireless
Transducer
Dynamic
Dynamic
Comfort
7.5
8.0
Comfort Picture
Weight
0.03 lbs
0.03 lbs
Clamping Force
0 lbs
0 lbs
Controls
8.1
7.7
Controls Picture
OS Compatibility
Not OS specific
Not OS specific
Ease Of Use
Good
Good
Feedback
Good
Good
Call/Music Control
Yes
Yes
Volume Control
Yes
Yes
Microphone Control
Mute/Unmute
No
Channel Mixing
No
No
Noise Cancelling Control
On/Off
Presets
Talk-Through
On/Off
On/Off
Additional Controls
Voice Assistant
Voice Assistant
Portability
9.4
9.5
Portability Picture
L
1.5" (3.9 cm)
0.9" (2.4 cm)
W
1.1" (2.8 cm)
1.6" (4.0 cm)
H
0.9" (2.3 cm)
0.8" (2.1 cm)
Volume
1.53 in³ (25.00 cm³)
1.28 in³ (21.00 cm³)
Transmitter Required
No
No
Case
8.0
8.0
Case Picture
Type
Hard case
Hard case
L
2.7" (6.8 cm)
2.6" (6.6 cm)
W
1.0" (2.6 cm)
2.3" (5.9 cm)
H
1.4" (3.5 cm)
1.1" (2.7 cm)
Volume
3.78 in³ (61.88 cm³)
6.41 in³ (105.00 cm³)
Build Quality
8.0
7.5
Build Quality Picture
Stability
8.0
8.0
Stability Picture
Headshots 1
Angled Picture
Side Picture
Headshots 2
Front Picture
Rear Picture
Top
Top Picture
In The Box
In The Box Picture
Isolation
Noise Isolation - Full Range
8.8
9.0
Noise Isolation - Full Range Graph
Noise Cancelling
Yes
Yes
Overall Attenuation
-23.37 dB
-24.24 dB
Bass
-21.03 dB
-19.76 dB
Mid
-26.69 dB
-25.66 dB
Treble
-22.54 dB
-28.12 dB
Noise Isolation - Common Scenarios
9.5
9.6
Noise Isolation - Common Scenarios Graph
Airplane Noise Attenuation
-23.09 dB
-23.24 dB
Airplane Noise Isolation Audio
Office Noise Attenuation
-21.75 dB
-22.12 dB
Office Noise Isolation Audio
Street Noise Attenuation
-24.51 dB
-24.60 dB
Street Noise Isolation Audio
Noise Isolation - Voice Handling
Female Voice 1
Male Voice 1
Female Voice 2
Male Voice 2
Leakage
8.5
8.5
Leakage
Leakage Audio
Overall Leakage @ 1ft
30.36 dB
30.15 dB
Microphone
Microphone Style
Integrated
Yes
Yes
In-Line
No
No
Boom
No
No
Detachable Boom
No
No
Mic
Yes
Yes
Recording Quality
5.2
6.7
Microphone Frequency Response
Recorded Speech
LFE
281 Hz
20 Hz
FR Std. Dev.
2.8 dB
4.36 dB
HFE
3,568.48 Hz
3,417.19 Hz
Weighted THD
85.93
29.772
Gain
-39.43 dB
20.22 dB
Noise Handling
7.0
6.8
SpNR
SpNR
6.75 dB
63.36 dB
Noise Gate
Always On
Always On
Speech + Pink Noise Handling
7.0
7.0
Speech + Pink Noise Audio Sample
Speech + Subway Noise Handling
7.0
6.5
Speech + Subway Noise Audio Sample
Active Features
Battery
8.1
7.1
Battery Type
Rechargable
Rechargable
Continuous Battery Life
12.2 hrs
6.5 hrs
Additional Charges
1.5
3.0
Total Battery Life
30.5 hrs
26 hrs
Charge Time
1.5 hrs
0.8 hrs
Power-Saving Feature
Auto-Off Timer and Standby Mode
Standby mode
Audio While Charging
Yes
Yes
Passive Playback
No
No
Charging Port
USB-C
USB-C
App Support
8.0
8.0
App Picture
App Name
Audio Connect
Bose Music
iOS
Yes
Yes
Android
Yes
Yes
macOS
No
No
Windows
No
No
Equalizer
Graphic + Presets
Graphic + Presets
ANC Control
Adjustable
Adjustable
Mic Control
No
No
Room Effects
No
No
Playback Control
No
Yes
Button Mapping
Yes
Yes
Surround Support
Yes
No
Connectivity
Wired Connection
0.0
0.0
Cable Picture
Analog Audio
No
No
USB Audio
No
No
Detachable
No
No
Length
N/A
N/A
Connector
No Wired Option
No Wired Option
Latency - Analog
N/A
N/A
Latency - USB
N/A
N/A
Recorded Latency
N/A
N/A
Recorded Latency Connection
No Wired Audio
No Wired Audio
Bluetooth Connection
7.8
7.5
Bluetooth Version
5.3
5.3
Multi-Device Pairing
3 Devices
2 Devices
Quick Pair (Android)
Yes
Yes
Quick Pair (iOS)
No
No
Line Of Sight Range
334.65 ft (102.00 m)
334.65 ft (102.00 m)
Latency - SBC
392 ms
292 ms
Latency - aptX
N/A
N/A
Latency - aptX Adaptive (High Quality)
N/A
373 ms
Latency - aptX Adaptive (Low Latency)
N/A
104 ms
Latency - LDAC
396 ms
N/A
Recorded Latency
Recorded Latency Codec
LDAC
aptX Adaptive (Low Latency)
AAC Support
Yes
Yes
Wireless Connection (Dongle)
0.0
0.0
Line Of Sight Range
N/A
N/A
Latency - Dongle
N/A
N/A
Recorded Latency
N/A
N/A
PC Compatibility
Analog
No
No
Wired USB
No
No
Non-BT Wireless
No
No
PlayStation Compatibility
PS4 Analog
No
No
PS4 Wired USB
No
No
PS4 Non-BT Wireless
No
No
PS5 Analog
No
No
PS5 Wired USB
No
No
PS5 Non-BT Wireless
No
No
Xbox Compatibility
Xbox One Analog
No
No
Xbox One Wired USB
No
No
Xbox One Non-BT Wireless
No
No
Xbox Series X|S Analog
No
No
Xbox Series X|S Wired USB
No
No
Xbox Series X|S Non-BT Wireless
No
No
Base/Dock
2.2
2.2
Type
Charging Case
Charging Case
USB Input
No
No
Line In
No
No
Line Out
No
No
Optical Input
No
No
RCA Input
No
No
Dock Charging
Yes
Yes
Power Supply
USB-C
USB-C
Check Price
Black
EAH-AZ100
SEE PRICE
BestBuy.com
Black
QuietComfort Ultra Earbuds (2nd Gen)
SEE PRICE
Amazon.com
Silver
EAH-AZ100
SEE PRICE
Amazon.com
Deep Plum
QuietComfort Ultra Earbuds (2nd Gen)
SEARCH
Amazon.com
White Smoke
QuietComfort Ultra Earbuds (2nd Gen)
SEE PRICE
Amazon.com
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Technics EAH-AZ100
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Comments
Technics EAH-AZ100 vs Bose QuietComfort Ultra Earbuds (2nd Gen): Main Discussion
What do you think of these products? Let us know below.
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I’m extremely interested in the aspect of Bluetooth codec support. I’d like to connect with a tiny usb dongle to my PC and PS5, I need something with really low latency but also good quality, I’m thinking aptX Adaptive or lc3+(it’s really hard to understand which devices support it). Does anyone have any recommendations? What should I buy? Is it better to wait for the Sony XM6 Truly Wireless? Thansk 🙂