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What we think
The PerfectRec Earbuds or Headphones team Learn more
Updated January 10, 2024·
Assuming you're looking for detailed advice on the Sennheiser HD 250BT versus the Thieaudio Monarch Mk II, the crucial considerations would be your budget, listening habits, and preferences. The Sennheiser HD 250BT, being much less expensive, will provide good sound quality and wireless convenience, making them suitable for casual listening, commuting, and perhaps some light exercise. However, the Thieaudio Monarch Mk II, being high-end in-ear monitors, offer superior sound quality with detailed highs and lows, which might be important for audiophiles or for professional use. They may also provide better noise isolation due to their in-ear design. If budget is less of a concern and you prioritize top-notch audio fidelity, the Monarch Mk II may be the better choice. On the other hand, if you need something more affordable for general usage and you prefer the comfort of over-ear headphones, the Sennheiser HD 250BT would be a practical option. Keep in mind that Bluetooth headphones like the Sennheiser HD 250BT may have some latency, making them less ideal for activities requiring tight audio-visual sync, such as gaming or watching movies. 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 HD 250BT
- Good for phone calls
- Very good for gaming
- 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
6.5
9.5
The Thieaudio Monarch Mk II is best in class for music, while the Sennheiser HD 250BT is only fair.
Gaming
8.8
6.7
The Sennheiser HD 250BT is very good for gaming, while the Thieaudio Monarch Mk II is only fair.
Phone Calls
7.2
5.1
The Sennheiser HD 250BT is good for phone calls, while the Thieaudio Monarch Mk II is poor.
Battery
25.0 Hours
N/A
The Sennheiser HD 250BT has 25 hours of battery life. The Thieaudio Monarch Mk II does not have a battery.
Cost
$64
$999
$50
$100
$150
$200
$250
$300
$350
$400
The Sennheiser HD 250BT has a price of $64 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 HD 250BT to be very good for podcasts and audiobooks, while the Thieaudio Monarch Mk II is good.
TV and Video
8.4
8.8
The Thieaudio Monarch Mk II and Sennheiser HD 250BT are both very good for TV and video.
Noise Reduction
6.0
6.0
The Sennheiser HD 250BT and Thieaudio Monarch Mk II are both only fair for noise reduction.
Build Quality
9.0
9.0
The Sennheiser HD 250BT and Thieaudio Monarch Mk II both have excellent build quality.
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How the Sennheiser HD 250BT and the Thieaudio Monarch Mk II compare to other earbuds and headphones
Spec Comparison
 |  | |
| Sennheiser HD 250BT | Thieaudio Monarch Mk II |
GENERAL | |||
|---|---|---|---|
| Price | |||
$64 | $999 | ||
Brand | |||
Brand | Sennheiser | Thieaudio | |
Release Date | |||
Release Date | May 1, 2021 | October 1, 2020 | |
Form Factor | |||
Form Factor | Headphones | Earbuds | |
Connectivity | |||
Connectivity | Wireless | Wired | |
SOUND | |||
|---|---|---|---|
Music Score | |||
Music Score | 6.6/10 | 9.5/10 | |
Phone Calls Score | |||
Phone Calls Score | 7.2/10 | 5.1/10 | |
Gaming Score | |||
Gaming Score | 8.9/10 | 6.8/10 | |
TV and Video Score | |||
TV and Video Score | 8.5/10 | 8.9/10 | |
Exercise Score | |||
Exercise Score | 6.2/10 | 4.5/10 | |
PERFORMANCE | |||
|---|---|---|---|
Battery life | |||
Battery life | 25 Hours | N/A | |
Wireless charging | |||
Wireless charging | No | N/A | |
Charging time | |||
Charging time | 3 Hours | N/A | |
Bluetooth version | |||
Bluetooth version | 5 | N/A | |
FEATURES | |||
|---|---|---|---|
Active Noise Cancelling | |||
Active Noise Cancelling | No | No | |
Noise Reduction Score | |||
Noise Reduction Score | 6/10 | 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 | 9/10 | 9/10 | |
Comfort score | |||
Comfort score | 7/10 | 7.6/10 | |
Size | |||
Size | N/A | Large | |
Weight (headset or single earbud) | |||
Weight (headset or single earbud) | 125 Grams | 9 Grams | |
Microphone style | |||
Microphone style | Integrated | N/A | |
Shopping
Sennheiser HD 250BT
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Dig into reviews and images
Headphone Check
Pete Scholßnagel | 2020
"As a lightweight, robust audio provider with a long battery life, the Sennheiser HD 250BT offer a lot for their price: very good Bluetooth codecs, an app connection and an extremely understated design. These headphones may not be among the most comfortable, but they deliver adequate sound – without overdriving or distortion."
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 HD 250BT 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
Joe Golden, Ph.D
CEO and Earbuds and Headphones Editor
Joe is an entrepreneur and lifelong electronics enthusiast with a Ph.D in Economics from the University of Michigan.
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Staff Expert & Software Engineer
Chandradeep is a staff expert and software engineer and expert in televisions and monitors. He’s been making monitor recommendations for ten years.
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Luis is a Mexico-based headphones expert. He’s been making headphone recommendations for five years and has close to 100 pairs in his personal collection.
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