Thinksound OV21

General Information

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Specifications:
 https://thinksound.com/products/ov21

  • Award-winning thinksound signature acoustics.
  • Voiced by Aaron Fournier, critically acclaimed Audio Engineer and thinksound founder.
  • Expertly crafted 45mm dynamic drivers delivering superb and accurate sound reproduction and an impressively wide soundstage.
  • Plastic components made with Eastman Trēva™−a revolutionary bioplastic created from sustainable wood pulp that reduces resonance, distortion, and improves acoustic performance.
  • Two 4.5’ long detachable, nylon braided, tangle-resistant cables – one with inline mic and one without.
  • Memory foam ear cups and adjustable head band for an insanely comfortable fit. You’ll have no trouble wearing these cans for hours on end.
  • Single button inline microphone and call/music control for crystal clear voice communication, whether you’re taking a business call or gaming online.
  • Compatible with iPhone® Android® and more. An adapter is required if your device does not have a headphone jack.
  • 3.5mm steel reinforced gold plated stereo plug for increased sound clarity and reliability.
  • Passive noise isolation that minimizes ambient sounds, so you can focus on your tunes, not distractions.
  • Headphone storage pouch to keep your ov21’s safe and sound.
  • Two (2) year limited warranty.

Latest reviews

Mataudiophiles

New Head-Fier
Pros: Quality, sound
Thinksound OV21
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Thinksound OV21

Peludium:

Thinksound is a relatively small company dealing with sound. It has its headquarters in Canada, which means it presents an interesting and different approach to sound in its products. Although at the moment their portfolio is not huge, I prefer a few well-designed and well-thought-out products to releasing them every month without practically any changes. Thinksound most likely follows a similar philosophy to me and thus has only two models of headphones in its offer. One of them is the IN20 in-ear headphones, which you can read more about in my detailed review, and the other is the OV21 on-ear headphones discussed now. These are particularly interesting headphones because their current price is around 200USD, which gives us only 50% of the initial price.

Unbxing and ergonomics:
What delights and surprises most about the OV21 is the incredible beauty that lies in its simplicity. The headphones come to us in a cardboard package that contains all the necessary information. It is worth mentioning that the company focuses very strongly on ecology, which is not only visible, but also very emphasized. That is why the cardboard is completely biodegradable, and the headphones themselves are wrapped in paper material and packed in canvas bags. The headphones come to us with two sets of cables. Both are braided with specially reinforced plugs. One is a classic 3.5 mm and the other has been enriched with a microphone. It is a bit of a pity that one balanced cable was not used instead. The headphones themselves are extremely small and very solidly made. The pads are made of a special memory foam and eco-leather developed by Thinksound. The same material covers the headband, which guarantees us long and comfortable listening. The earcups, although small, securely and stably cover the entire ear, guaranteeing excellent acoustic insulation. The outer layer of the headphones is made of walnut wood, which gives them not only dignity, but also uniqueness in appearance. The plastic elements, of which there are really few, are made of a special cellulose material. The heart of the headphones themselves are specially designed and custom-made by Thinksound 45mm dynamic transducers. When it comes to noise reduction, the headphones guarantee very good isolation from the surroundings. However, despite the closed design, they are characterized by good ventilation and excellent sound pressure regulation. All this means that they not only sound great, but also provide excellent comfort even during long listening sessions.
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Sound:


Low tones:
In the Thinksound OV21 model, the focus was on combining a universal sound with neutrality and naturalness. Therefore, in accordance with this assumption, the low tones do not stand out, but instead show a natural and linear character with a very good balance. In many songs, this results in a beautiful musical and technical foundation. Importantly, these are not boring headphones, but they strongly focus on solid technical foundations. Personally, I like it when the low bands are not overly dominant and when the presentation encourages exploration of the music, and does not drown it out with the amount of low tones. Additionally, the smooth and balanced character of the low bands ensures no feeling of fatigue during long listening sessions or during everyday work. This is a compromise between sterility and monitor sound ideal for monitoring, and musical and engaging presentation of low tones. Which is exactly what Thinksound wanted to achieve in its philosophy and design.
Midrange: This is the area where the Thinksound OV21 maintain a balanced and linear character, the midrange is neither muffled nor excessively withdrawn. However, its upper range is slightly exposed, this elevation results in a huge amount of detail. At the same time, apart from a very large amount of information, very smooth and clean sound with a linear and balanced presentation, we can sometimes catch some sibilants. For this reason, I recommend using a darker amplifier. What is most impressive is the large, really large for closed headphones sound stage with pleasant depth and very good width. The headphones may not be masters in conveying emotions like, for example, my beloved Arye Organic from HifiMan, but they win with incredible detail and balance. Listening to Michael Jackson’s songs, we can easily catch each instrument separately and each element of the presented music. Here we have a great extension of the midrange and an even sound that goes beyond what we are accustomed to with closed headphones.
High tones: Although they break the linearity and impeccable balance profile a bit. Thanks to such tuning, they become easier to hear and this results in a very good sound on the go. It is worth noting here that although the Thinksound OV21 are headphones with an impedance of 50 Ohm and are relatively undemanding in terms of control, they scale very well with better and more powerful amplifiers. That is why I recommend using, for example, the neutral xDuoo poke II, which will not disturb the natural character of our headphones, or, for a change, the warmer and musical xDuoo link 2 bal, which will add great low tones to our headphones. Thinksound OV21 are headphones that really adapt to the source. Personally, I do not think that the high tones are lacking in these headphones, but their even and monitor character indicates that we will have a calm and balanced sound here, rather than spectacular and shiny as in musical headphones.
Comparisons:

Thinksound OV21 (200USD) VS Sivga robin SVO21 (169USD)

Sivga is a brilliant brand offering excellent and beautiful headphones, I respect their products very much, and the first one I had contact with was the SVO21 headphones. That’s why I approach them with special sentiment. The sound of the SVO21 is much more focused on entertainment, it offers a powerful and very clear bass, and a recessed but still clear midrange. The highs are also more exposed and much brighter. The earcups themselves are much larger, which will be appreciated especially by people with larger ears. However, the Thinksound OV21 offer better acoustic isolation and a balanced sound signature similar to that offered by the Oriole from sivga. So if you are looking for entertainment and strong bass then robins will be great, and if you prefer tonal balance and a more linear presentation then definitely listen to Thinksound OV21.

Thinksound OV21 (200USD) VS HifiMan sundara closed back (149USD)
Sundara closed back offers a much more direct and closer to the listener sound. The speed of the planar transducer makes the presentation of sundara closed back a bit more dynamic. At the same time sundara closed back has a much smaller stage and offers a less linear presentation. At the same time conveying more emotions. Therefore, when it comes to linearity and balanced sound then Thinksound OV21 will undoubtedly be the leaders, but if we are looking for a planar presentation with a closer midrange and a more emotional message then it is worth listening to sundara closed back from HifiMan.

Thinksound OV21 (200USD) VS HifiMan R9 (99USD)
R9 are headphones that focus very much on low tones and play on the Harman plan. This translates into a retraction of the midrange and a boost in the lower bands. This makes them ideal for electronic music, but they are not universal headphones and do not offer such wide versatility as Thinksound OV21. OV21 are smaller and offer slightly less depth, but also a much greater width of the music scene, which results in a more monitor character compared to R9.
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For my tests, I used a stationary DAC/AMP: FiiO K11, Komo Earmen Tradutto+ Earmen Ch-AMP, and mobile devices: Earmen sparrow, xDuoo link2 and DAP iBasso DX170. I used my test playlist on tidal. I also decided to test the synergy with the EF600 from HifiMan, which resulted in a very good final effect and gave a very good result, so I recommend connecting the OV21 to warmer systems.
Summary:
Thinksound OV21 are very well-made headphones with an excellent price-quality ratio. They are really small and very comfortable. They are ideal both in urban spaces and in the comfort of your home. However, it is worth remembering that not every 3.5mm cable will fit them, because they have a deep implementation of the cable on the input side. However, this has a positive impact on the safety aspect and prevents accidental pulling out of the socket. When it comes to the musical presentation itself, the Thinksound OV21 offer a very linear and balanced sound with very high detail and an excellent technical layer. At the same time, the sound is full and engaging, it has not been deprived of life. The wide sound stage offers not only a large range in width, but also very good depth and sound separation. Thinksound OV21 surprised me not only with its excellent build quality and beautiful design, but also with its extremely refined tuning. These are headphones that perfectly combine naturalness and linearity with great technicalities. In all this, convenience and comfort have not been forgotten and the appropriate level of musicality has been taken care of. That is why I can only write a full recommendation for Thinksound OV21, which completely charmed me with their versatility and convenience, which perfectly combines the sphere of utility with a more purist audiophile approach to audio equipment. Importantly, these are completely unremarkable headphones. Overall, Thinksound ov21 offer beautiful and dense sound, which wins with its versatility, these are headphones ideal for listening to music, as well as for working with it. They will work great as a set on the go, but they also go great with our favorite amplifier in the comfort of home. For me, they sounded best with the r2r-based DAC/AMP EF600 from HifiMan, but at the same time they sounded great on any equipment they were connected to. This shows how much work Thinksound put into this project. Thanks to this, we get not only nice headphones, but also incredibly versatile equipment, which was already extremely profitable at its original price. Currently, taking into account the sale and the reduced price, these are headphones of even greater value. If someone likes closed items, these are very good and balanced headphones. It is worth adding here in conclusion that Thinksound OV21 are headphones that practically do not require greater synergy and one of their huge advantages is their enormous musical flexibility.
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Headphones and Coffee

Previously known as Wretched Stare
ThinkSound
Pros: Natural sounding, large soundstage and beautiful wooded cups, scales with power. It is very comfortable.
Cons: Upper Mids can be hot with more volume, but this is minor, Bass is quick to roll off, earpads are not easily replaced.
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Specifications:
45mm dynamic drivers with a 5Hz to 22kHz frequency response. 99±3dB at 1KHz 1mW sensitivity and 50Ω impedance.

First thing noticed is the packaging is Environmentally friendly and I appreciate that, opening it up one sees the walnut housing of these really good-looking headphones. Both the 2 cables one with and one without a microphone and the headphones have a nice cloth pouch to keep them in.
The headphones are lightweight but sturdy being made of metal and wood with a little plastic. They are very comfortable as the pads are plush and the headband as well.

Sound:
Bass:
Presents with good speed and nice tight punch. Bass is more quality than quantity but is still very present and sub bass has a good rumble just a fast roll off. Mid Bass is impactful but more towards the warmish neutral side. Overall Bass has good energy and control.

Mids:
Upper mids have a little emphasis and are a little spicy particularly with poor recording and female vocals. Lower Mids are a little warm and male vocals sounded good and natural. Mids overall sound clear and pleasant with a slightly forward position in front of the instruments.

Treble:
Presents very open and airy with sparkle and details, While they have a good extension and energy they never got harsh or fatiguing in my opinion.

Soundstage:
One of the OV21's strong points is the excellent wide open soundstage for a closed back this is unexpected, the soundstage is wide and has good depth and height as well as great imaging and lairing, prefect for mobile gaming.

Conclusion: I was impressed with the overall performance, The OV21 is well made comfortable and sounds great. The price puts it in a very competitive area. Still I do like them and think they have a place due to their uniqueness .

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ywheng89

100+ Head-Fier
Thinksound OV21's Long term usage Review
Pros: Good technicalities (Soundstage and Imaging)
Airy Treble and plenty of details
Natural and good timbre
Solid build quality
Cons: Bass is slightly rolled off
Slight upper mids boost might not be for everyone
Intro
Thinksound’s OV21 is a closed back over ear headphone, the outer part of the cup is made of wood and within it houses a 45mm dynamic driver. As a whole, thinksound is a company who cares about good sound and also sustainability, the plastics on the headphone are made of bioplastics with Eastmen Treva.

Packaging
The packaging is bare minimal as I believe this is due to sustainability. It came with two types of cable, one with a microphone and another one without. A cloth storage pouch for the cables and also the headphone itself. The overall packaging I would describe as being simple and clean, yet functional.
Personally i preferred if it comes with a hard carrying case to store the headphone as it offers more protection than a cloth storage pouch

Build/Comfort
Build quality of OV21 is solid and there isn’t any creaking sound from the plastics nor it looks flimsy at all. As mentioned earlier, the outer part of the cup is made of wood and what’s special about it is that not every pair of OV21 will look the same due to pattern and colour variation from the wood.

The clamping force is average and fits snuggly on my head, the earpads are memory foam earpads and it is very soft and doesn’t cause any discomfort even after a long listening session. Getting a good seal is also crucial for the bass response. The earpads are easily replaceable as they are attached using some magnetic pad. However, I have also spoken to thinksound’s rep on the possibility of using a third party earpad, as long as the measurement is suitable for OV21, there shouldn't be any issue fitting it. I will update this section once they get back to me with the measurements.

Source
Windows 11 Tidal -> Chord Mojo -> Thinksound OV21
Windows 11 Tidal -> iFi iDSD Nano Black Lable -> Thinksound OV21
iPod Touch 4th Gen -> Thinksound OV21
iPhone 12 Mini Apple Music -> Apple Lightning Dongle -> Thinksound OV21

Sound
Let me begin by saying that upon putting them on and listening to them for the first time, I didn't like it at all. It was bright and the bass was lean, and so I've decided to let them burn in for a little while before listening to them again. To my surprise, the sound does change over time and the brightness is slightly toned down and the bass has got more slams compared to the first listen. So, I've put them through for about 50-60 hours and used them for a month plus prior to writing this review. This is to ensure that my impression/thoughts are as neutral as possible.

OV21 is quite neutral to my ears. The tonality of OV21 is leaning towards neutral bright.
The timbre is slightly dry to my preference, but is quite accurate overall. I find OV21 to be quite sensitive to source change, in the sense where the sound can be colored by different source, for example, on my iPod Touch 4th Gen, the bass on the OV21 is slightly boosted and the top end is slightly smoother, where as on iFi iDSD Nano Black Label, i would say it is slightly reference sounding with a fast and tight bass and plenty of details on the top end.

Bass
  • Bass on the OV21 is fast and tight, do not expect basshead level of bass performance, OV21 is nothing like that
  • Sub bass will rumble when its called for, but it is lacking in extension
  • The bass performance of OV21 is very good for songs like Metallica’s Master of Puppets, Slipknot’s Duality, Mastodon’s Pushing the Tides where the bass is fast enough to not cause the track to be become muddy
  • I personally preferred the bass to have a little bit more in terms of quantity, but that’s just my preference
  • Overall, i would say the bass performance is audiophile kind of bass response where it is not boosted but rather flat

Mids
  • Male vocal has got average texture to it, not too dry sounding
  • Female vocal lacks a little warmth hence sounding a little bit dry, but not to the point where it deters you from enjoying female vocal track
  • It could be from the slightly boosted upper mids, you get plenty of details but some instruments could came off a little fatiguing such as cymbal splash

Treble
  • Treble response is smooth and not harsh
  • It is very airy and its full of details, i personally think that this is the strong point of OV21
  • Micro details are very good and you don’t really have to try very hard to listen to the sound of certain faint instruments


Soundstage/imaging
  • The soundstage is also part of OV21’s strong point. For a closed back headphone, it definitely doesn’t sound like one given the soundstage performance
  • The soundstage has got a good depth and width, it doesn’t sound in your head nor too artificially wide
  • Imaging is also good as instruments can be pinpointed easily and left right transition for HRTF is also very good

Drivability
  • OV21 is very easy to drive, you can get good listening volume straight out of headphone jack from your phone
  • It does benefit from a better source, a warmer source in particular to slightly tame the top end for those who are sensitive to treble
  • Straight out of 4th gen iPod touch gives a very good listening experience as well, you can get a good listening experience from any device in my experience
  • It doesn’t really benefit much from amping based on my experience, the sound doesn’t really change much

Final Thoughts
OV21 is not some headphone where you first listened and you get the “WOW” moment, it is a headphone that you will grow to love over time, at least for me. As mentioned earlier, I didn't like it at all upon listening to it after I unboxed it.

I believe I am fair and have used this headphone for more than a month plus prior to writing this review instead of writing the review one week after listening to it. If I had written the review back then, it wouldn’t be fair to OV21 as I didn't give them a proper listening session. The timbre is good and natural, not to mention the soundstage and imaging capability. The only thing that I find lacking is the bass.

Will I recommend OV21? Yes, and only if you are someone who is not sensitive to treble and not a basshead, if you like analytical sound and flat bass, OV21 is for you.

If you are interested in getting a pair, head over to thinksound’s store!

*I received OV21 from thinksound in exchange for my review, i covered the shipping and taxes only. My thoughts are exactly of mine and I am not influenced by thinksound in any way to produce this review.

*Pictures will be attached on my website

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