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What we think
The PerfectRec Earbuds or Headphones team Learn more
Updated April 11, 2024·
If you prioritize wireless freedom, modern features like Bluetooth LE, and active noise canceling, the Sennheiser Momentum True Wireless 4 would suit you well, especially for activities like exercising and traveling. With a solid build quality and an app with custom equalizer settings, they also offer very good sound quality and are optimized for both Android and Apple devices. On the other hand, the Thieaudio Monarch Mk II excels in sound quality but lacks wireless capabilities and modern conveniences like an app equalizer. It may require additional investment in cables for the best audio experience and is more suitable for audiophiles willing to forego the convenience of wireless tech for top-tier sound. Give Feedback
this description is based on the product variant with some specs and product variant with some specs. At the time of writing, the variant with some specs cost some dollars and the variant with some specs cost some dollars.
Advantages of the Sennheiser Momentum True Wireless 4
- Good for phone calls
- Excellent for gaming
- Very good for exercise
- Very good for air travel
- Very good for podcasts and audiobooks
Advantages of the Thieaudio Monarch Mk II
- Best in class for music
Key differences
Music
7.5
9.5
The Thieaudio Monarch Mk II is best in class for music, while the Sennheiser Momentum True Wireless 4 is good.
Gaming
9.1
6.7
The Sennheiser Momentum True Wireless 4 is excellent for gaming, while the Thieaudio Monarch Mk II is only fair.
Phone Calls
7.2
5.1
The Sennheiser Momentum True Wireless 4 is good for phone calls, while the Thieaudio Monarch Mk II is poor.
TV and Video
8.0
8.8
The Thieaudio Monarch Mk II and Sennheiser Momentum True Wireless 4 are both very good for TV and video, though the Thieaudio Monarch Mk II is somewhat better.
Noise Reduction
8.3
6.0
The Sennheiser Momentum True Wireless 4 is very good for noise reduction, while the Thieaudio Monarch Mk II is only fair.
Battery
7.5 Hours
N/A
The Sennheiser Momentum True Wireless 4 has 7.5 hours of battery life. The Thieaudio Monarch Mk II does not have a battery.
Cost
$300
$999
$150
$200
$250
$300
$350
$400
The Sennheiser Momentum True Wireless 4 has a price of $300 and the Thieaudio Monarch Mk II costs $999.
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Key similarities
Podcasts and Audiobooks
8.1
7.9
Although they have very similar scores, PerfectRec considers Sennheiser Momentum True Wireless 4 to be very good for podcasts and audiobooks, while the Thieaudio Monarch Mk II is good.
Build Quality
8.9
9.0
Although they have very similar scores, PerfectRec considers Thieaudio Monarch Mk II to have excellent build quality, while the Sennheiser Momentum True Wireless 4 has very good build quality.
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How the Sennheiser Momentum True Wireless 4 and the Thieaudio Monarch Mk II compare to other earbuds and headphones
Spec Comparison
 |  | |
| Sennheiser Momentum True Wireless 4 | Thieaudio Monarch Mk II |
GENERAL | |||
|---|---|---|---|
| Price | |||
$300 | $999 | ||
Brand | |||
Brand | Sennheiser | Thieaudio | |
Release Date | |||
Release Date | March 1, 2024 | October 1, 2020 | |
Form Factor | |||
Form Factor | Earbuds | Earbuds | |
Connectivity | |||
Connectivity | Wireless | Wired | |
SOUND | |||
|---|---|---|---|
Music Score | |||
Music Score | 7.5/10 | 9.5/10 | |
Phone Calls Score | |||
Phone Calls Score | 7.2/10 | 5.1/10 | |
Gaming Score | |||
Gaming Score | 9.1/10 | 6.8/10 | |
TV and Video Score | |||
TV and Video Score | 8.1/10 | 8.9/10 | |
Exercise Score | |||
Exercise Score | 8.3/10 | 4.5/10 | |
PERFORMANCE | |||
|---|---|---|---|
Battery life | |||
Battery life | 7.5 Hours | N/A | |
Wireless charging | |||
Wireless charging | Yes | N/A | |
Charging time | |||
Charging time | 2 Hours | N/A | |
Bluetooth version | |||
Bluetooth version | 5.4 | N/A | |
Case Battery Life | |||
Case Battery Life | 30 | N/A | |
FEATURES | |||
|---|---|---|---|
Active Noise Cancelling | |||
Active Noise Cancelling | Yes | No | |
Noise Reduction Score | |||
Noise Reduction Score | 8.4/10 | 6/10 | |
Virtual Surround | |||
Virtual Surround | No | N/A | |
Android App | |||
Android App | Yes | N/A | |
iOS App | |||
iOS App | Yes | N/A | |
Mic Quality | |||
Mic Quality | 8.5/10 | N/A | |
BUILD AND DESIGN | |||
|---|---|---|---|
Build Quality | |||
Build Quality | 8.9/10 | 9/10 | |
Comfort score | |||
Comfort score | 7.6/10 | 7.6/10 | |
Size | |||
Size | Medium | Large | |
Weight (headset or single earbud) | |||
Weight (headset or single earbud) | 5.8 Grams | 9 Grams | |
Microphone style | |||
Microphone style | Integrated | N/A | |
Shopping
Sennheiser Momentum True Wireless 4
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Dig into reviews and images
What HiFi
Andy Madden | January 2024
"It’s fair to say our brief time with the Sennheiser Momentum True Wireless 4 was a generally positive one. Comfort levels seem similar to what we have experienced before and the general flavour of sound was to our liking although we need to get a pair in to test and put up against the big rivals at the money from Bose and Sony. It could be an interesting contest."
Thieaudio Monarch Mk II
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Dig into reviews and images
Audiophile On
Audiophile On | August 2021
"No other earphone I have listened to in the past 12 months has given me as much joy as the Thieaduio Monarch MKII. One of those IEMs will make you question where we can go from here. The sound is jaw-dropping, leaving you wanting more and more. It makes you want to run through your entire music library and reevaluate. It makes you not feel bad about paying full price for them, especially in a hobby where buyers' remorse is genuine. For me, it's top tier, rivaled by a few but not surpassed."
Get a great deal on the Sennheiser Momentum True Wireless 4 or the Thieaudio Monarch Mk II
About Sennheiser
A family-owned company, Sennheiser is a German, high fidelity, audio equipment manufacturer founded in 1945. Their consumer audio division is now owned by the Swiss hearing aid and cochlear implant manufacturer Sonova. Sennheiser offers a wide variety of, very high quality, audio equipment solutions, from headphones to earbuds, full sets of monitoring speakers, amplifiers and microphones. They also make what is widely regarded as the best, and most expensive, headphones in existence, the HE-1 Orpheus, costing a whopping $59,000 dollars.
About Thieaudio
Thieaudio is the in-house brand of Linsoul Audio, a Chinese earbud and headphone retailer specializing in what the community lovingly calls Chi-fi, that is high fidelity brands out of China. Thieaudio was established in 2019 as the creative engineering branch of Linsoul. As of today, they market three different lines of earbuds, Voyager, Legacy and the extremely well-received Monarch.
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This information was produced and vetted by the PerfectRec earbuds & headphones team. We are a product research and recommendation organization that meticulously reviews and evaluates the latest earbuds or headphones information and makes it digestible for you.
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About the Earbuds or Headphones team
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Joe is an entrepreneur and lifelong electronics enthusiast with a Ph.D in Economics from the University of Michigan.
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