[Winni]

So i've heard some talk about the openheart resin earphones lately. Now these look very similar to the paiaudio dr2. I've found a number of iems that look alike, all with different branding or no branding at all. Here are some examples:
Pai Audio DR2
Openheart Resin Earphone
Tiandirenhe TD02
FDBRO TD1
PIZEN D90
No name A2
Are these the same but rebranded or do they have different drivers? The shells seem to be the exact same other than differing colors.

This was mentioned several times here, Tiandirenhe is an OEM manufacturer producing IEMs for other companies

In some cases, the companies claim to have different drivers, but so far there is no proof, as noone has cut them open and compared the look or send it to a lab for a test.

So, who would like to cut their IEMs open for a test?

 

[Nimweth]

This was mentioned several times here, Tiandirenhe is an OEM manufacturer producing IEMs for other companies

In some cases, the companies claim to have different drivers, but so far there is no proof, as noone has cut them open and compared the look or send it to a lab for a test.

So, who would like to cut their IEMs open for a test?

You could do Open Heart surgery lol!

 

[baskingshark]

You could do Open Heart surgery lol!

I hope it doesn't die of a broken heart though!

Respect to those who open beryllium drivers though, better take precautions cause those are potentially toxic if inhaled in particulate form.

 

[The3DCie]

You're telling me these have better SQ, build, fit, cable, isolation, durability than, for example 7$ EDX?

I have a hard time imagining that, but as we all have different ears and different preferences, that might be the case actually.
I know one of my preferred IEM is still Sony MDR-450, which is probably nothing special to anyone listening to it but which is so sweet to listen to when listening to classical music. It lacks details, a bit of sparkle but it's comfortable and it's a real gem in my ears.
Those JVC could be the same in his ears!

 

[chickenmoon]

I received the OpenHeart Resin yesterday and I have now 4 of these resin IEMs, here is what I can say about them.

A visual inspection of the transparent ones reveals that all the drivers housings are similar if not identical in shape and size but are all different from each other. For the 7Hz i77 it is made of 3 parts while the 7Hz i77 Pro is made of two parts separated near the top and the OpenHeart Resin of two parts separated near the bottom. The drivers housings of the i77 Pro looks identical to the ones of the Pai Audio DR2 reviewed by @Otto Motor . The Smabat Black Bat is opaque and so there is nothing I can say about it.

They are all back vented but only the 7Hz ones are front vented.

Measurements reveal that 3 of them have a curve of very similar general shape with only the i77 being different. The 3 are also similar to the DR2 as measured by @Otto Motor . Black Bat and Resin have near identical curves.

 

[dharmasteve]

I received the OpenHeart Resin yesterday and I have now 4 of these resin IEMs, here is what I can say about them.

A visual inspection of the transparent ones reveals that all the drivers housings are similar if not identical in shape and size but are all different from each other. For the 7Hz i77 it is made of 3 parts while the 7Hz i77 Pro is made of two parts separated near the top and the OpenHeart Resin of two parts separated near the bottom. The drivers housings of the i77 Pro looks identical to the ones of the Pai Audio DR2 reviewed by @Otto Motor . The Smabat Black Bat is opaque and so there is nothing I can say about it.

They are all back vented but only the 7Hz ones are front vented.

Measurements reveal that 3 of them have a curve of very similar general shape with only the i77 being different. The 3 are also similar to the DR2 as measured by @Otto Motor . Black Bat and Resin have near identical curves.

Very similar. Listening to the bass of the Black Bat and the Open Heart how do you feel they compare?

 

[chickenmoon]

Very similar. Listening to the bass of the Black Bat and the Open Heart how do you feel they compare?

I listened to the Resin yesterday and the Black Bat some days ago so take this with a grain of salt but I don't think they are quite as identical as it may seems on graph with the resin being a bit warmer and the Black Bat a bit drier and a bit more impactful. Both are a bit too much bass for my taste though.

What's your take? You've got both too if I'm not mistaken.

 

[dharmasteve]

I listened to the Resin yesterday and the Black Bat some days ago so take this with a grain of salt but I don't think they are quite as identical as it may seems on graph with the resin being a bit warmer and the Black Bat a bit drier and a bit more impactful. Both are a bit too much bass for my taste though.

What's your take? You've got both too if I'm not mistaken.

Similar to you. I find the Open Heart 'a bit' more 'balanced'. The Black Bat has too much bass for me too. I don't tend to listen to them much. Of my latest IEM's, the LZ A7, KBear Believe, and HZ Heart Mirror are much more enjoyable. I like good bass but I am not in any way a bass-head

 

[Winni]

What is very interesting: Tiandirenhe has besides their own product lines, also CVJ IEMs in their shop but also the Kbear Diamond, The Tri Starlight and other Kbear IEMs. In the description of Starlight it says, that it is handmade and it takes some time to produce it. This could mean, that they also produce for Kbear/Tri

Rumours also say, that they are TRN.

The new TFZ Essence is also made by them, with 129USD TFZ demands a hefty markup compared to the OEM products:

In the Penon Audio webpage they state, the diaphragm is beryllium coated, also on the marketing material it is shown. But when you look on other aliexpress auctions, in the majority there is no word about beryllium

 

[Nimweth]

What is very interesting: Tiandirenhe has besides their own product lines, also CVJ IEMs in their shop but also the Kbear Diamond, The Kbear Starlight and other Kbear IEMs. In the description of Starlight it says, that it is handmade and it takes some time to produce it. This could mean, that they also produce for Kbear

Rumours also say, that they are TRN.

The new TFZ Essence is also made by them, with 129USD TFZ demands a hefty markup compared to the OEM products:



In the Penon Audio webpage they state, the diaphragm is beryllium coated, also on the marketing material it is shown. But when you look on other aliexpress auctions, in the majority there is no word about beryllium

KBEAR and TRI, not TRN, are associated.

 

[Winni]

@Nimweth

TiandiReNhe is allegedly TRN, one of the beta-testers told this to a reviewer.

They have only products in the shop, which they produce by themselves as an OEM company, so it is possible, that Tiandirenhe is producing for Kbear/Tri

They produce not only resin IEMs, but also from other materials.

 

[Slater]

What is very interesting: Tiandirenhe has besides their own product lines, also CVJ IEMs in their shop but also the Kbear Diamond, The Kbear Starlight and other Kbear IEMs. In the description of Starlight it says, that it is handmade and it takes some time to produce it. This could mean, that they also produce for Kbear

Rumours also say, that they are TRN.

CVJ = TRN. It’s no rumor; they flat out told me they are the same.

 

[jant71]

CVJ = TRN. It’s no rumor; they flat out told me they are the same.

Did they tell you what they have against vowels??

 

[Kumonomukou]

I'd share a bit of my opinions on budget earbuds acquired recently, so people can get more info about them.

KZ Edx: Somewhat bright, vastly less bass compared to other KZs. Very clean notes, so could be a good device for podcast etc. A bit over-hyped, especially if you're looking for a smooth listening experience.

Memt X6s: Bassy traditional earbuds. Surprisingly separates the vocal well from the overall warm background. Reminds me of Rose Masya with more bass and less highs. Would have Preferred more treble and mids from this one, but it can be a decent situational buds for BASS!

Open Heart Resin: Great looking, packed with punchy midbass. Slightly recessed mids and tamed treble, and not super detailed. Decent gift option for average consumers.

TenHz K5: On the neutral side. Reminds me of a lot of above average hybrids in past 3 years. Nothing wrong with it, but didn't WOW me from the start. Decent micro-details, and everything was presented, like a safer tuned Oriveti NP. Would love slightly more rumble in that department.

Sen*** Kp580: Don't understand why some people call them bassy. Their bass maybe sufficient with good seal, but overall upper-mids dominant. Clean sound, and very easy to drive. Excellent built! Would've hope more layered sound by them, as I couldn't enjoyed them without Bass-elevated EQs.

Sen*** MT300: More technical of bunch! You can clearly tell different drivers are doing their roles in music production. More bass and more treble details than Kp580, and surprisingly light-weighted for the looks. Very good performance by Sen***, but I'd question the fatigue issue in long listening session because the way treble plays. Keep that in mind! Despite how good the silver ones may look on photos at times, I'd choose more subdued gun color if I have to pick again. I'll have to sand them with sandpaper if I decided to take them out of house. They're just way too bling lol.

 

[Winni]

@Slater Good to know! I will ask Tiandirenhe straight away, if they are producing for CVJ, TRN and Kbear, let's see what they answer