Precog's IEM Reviews & Impressions

[piotrus-g]

I personally hear irregularities in the sound, like some kind of resonance, but I thought it is just me.

exactly, they shift resonances to a degree that's too much. They impact frequencies as low as 3kHz

 

[firesign]

F7u is very tips dependent i really like it with Aroma tips and with sources as RS6 or M9. a bit less with N6ii Ti R01 and T01, i don't own DX300 bit if i'd chose an amp board for F7u i'd try AMP13.
IMHO worth have more sources to judge an iem.

I don't know about Precog, but I am very sure that I don't need several sources to know if I like an IEM or not.

It is true that with different tips I perceive a change, sometimes radical, in the sound of many IEMs (in others less). But the effect of changing from one source to another, when both are of quality, at least for me is minimal. And it certainly doesn't work for an IEM that I don't like with one source to like with another.
I like or dislike an IEM, but the subtle change in sound from one source or another has never influenced me to change my mind about it. And yes, I have and have had even more sources to try.

 

[Xinlisupreme]

I don't know about Precog, but I am very sure that I don't need several sources to know if I like an IEM or not.

It is true that with different tips I perceive a change, sometimes radical, in the sound of many IEMs (in others less). But the effect of changing from one source to another, when both are of quality, at least for me is minimal. And it certainly doesn't work for an IEM that I don't like with one source to like with another.
I like or dislike an IEM, but the subtle change in sound from one source or another has never influenced me to change my mind about it. And yes, I have and have had even more sources to try.

Every IEMs sounds different with different sources

 

[firesign]

Every IEMs sounds different with different sources

As I said before, I have not been able to hear a decisive difference between any IEM and source. Just subtle changes that have never changed my appreciation of the sound of an IEM from "like" to "dislike" or the other way around.

Do they sound different? Yes.
Is the difference decisive? Absolutely not.
IMHO

 

[fabio19]

I don't know about Precog, but I am very sure that I don't need several sources to know if I like an IEM or not.

It is true that with different tips I perceive a change, sometimes radical, in the sound of many IEMs (in others less). But the effect of changing from one source to another, when both are of quality, at least for me is minimal. And it certainly doesn't work for an IEM that I don't like with one source to like with another.
I like or dislike an IEM, but the subtle change in sound from one source or another has never influenced me to change my mind about it. And yes, I have and have had even more sources to try.

I own Traillii, which I listen to with LPGT Ti and LP6 Ti. I can guarantee you that it has two different yields, with the same cable and with the same track. Then of course you can prefer LPGT or LP6 but the judgment on Traillii is a little different. Traillii's prerogatives remain on both LPGT and LP6, so nice mid-range, good bass (for a BA) and excellent soundstage. But with LPGT with long plays and with metal music, there is a vivid and shimmering vein in the medium-high and high range, while with LP6 everything remains more stable, harmonious and above all less tiring in the long run. So if I had to judge Traillii ONLY having listened to it with LPGT I would say that it is an excellent iem but then smoothing something on the highs. If I were to judge Traillii ONLY with LP6 I would say that it is a perfect iem. If you then try to "play" with the cables on the Traillii listening to LPGT and LP6 it changes again and changes even more. Well ..... I believe that the variables are so many that you can summarily have an opinion. By listening with multiple sources and maybe even with more cables you can paradoxically have more judgments ranging from the most positive to the least positive. Because logically Traillii is THE iem of absolute reference, but listening to other ems that may or may not be liked by themselves, the changes could be multiple and more or less pleasant.

 

[dialogue]

guys i want to buy 1 iem around 270 usd or less... which is best iem in term of technicallities , like :

micro details dan resolution,
separataion,
layering,
depth,
Height,
imaging accuracy,

and i really love great treble, my preferences treble tonal are :

- Complete treble from lower treble till uppee treble, sparkly, crispy, (but in good way)
- Treble roll off smooth not fast,
- So had great treble extension & airy...
- treble must be have great impact and attack...

what is the best recomendation under 270 usd. (if i can said the max price is Oxygen price 270usd)

the option :

1. raptgo hookx,
2. tanchjim oxygen,
3. letshuoer s12,
4. Tin P1 Max,
5. Aune Jasper,

or any recomendation guys other IEM ?


nb.
my sopurce :
dac amp ifi gryphone.
dac amp topping ex5.

both have output power 1000mW.

and my fav iem that i have now HZsound Heart Mirror.

very thanks full mate...

 

[o0genesis0o]

@Precogvision I was going to tag you in this article and then I realised who wrote it That's a lot of 64 Audio CIEM though. If I pay the kilobuck price again, would you recommend a CIEM from 64 Audio in that price range (most likely A4s or A3t) or go with universal again (Monarch Mk2)?

 

[piotrus-g]

As I said before, I have not been able to hear a decisive difference between any IEM and source. Just subtle changes that have never changed my appreciation of the sound of an IEM from "like" to "dislike" or the other way around.

Do they sound different? Yes.
Is the difference decisive? Absolutely not.
IMHO

Not trying to be rude but this is n=1 approach.
There are IEMs that will change up to 6-7dB in bass response depending on the output impedance of the amplifier - there are IEMs notable for changing 180 degrees from source with 0,1Ohm output impedance and something that has say 6 ohms on the output.
Now if all your sources are 0,1 on the output or all the IEMs you tired are Dynamics, Planar or Flat impedance BAs, yeah you won't hear that much of a difference.
I'm speaking from a perspective of someone with access to GRAS coupler, sources with different OI and as someone who spent last 6 years voicing the importance of impedance in IEM development

[EDIT]I hope I won't be braking rules by linking this article: https://www.samma3a.com/tech/en/amplifier-impedance/ which supports my point with graphs

 

[o0genesis0o]

exactly, they shift resonances to a degree that's too much. They impact frequencies as low as 3kHz

Hey, thanks for the response. Good to confirm that I'm not the only one having problem with spin-fit tips. Thanks for having Precog review the unit. I would consider your brand when I'm on the market for a multi-BA set again.

As I said before, I have not been able to hear a decisive difference between any IEM and source. Just subtle changes that have never changed my appreciation of the sound of an IEM from "like" to "dislike" or the other way around.

Do they sound different? Yes.
Is the difference decisive? Absolutely not.
IMHO

Usually that's the case, but there are some exceptions. IMHO, something extreme like E5000 or Andromeda can swing from like to dislike based on source. If you listen to E5000 on Apple dongle, you would correctly say it's a muddy mess. However, amp it up properly and it would sound entirely different, though the tonality stays the same (I did measure). Andromeda, on the other hand, changes tonality with slightest shifts in the OI.

 

[piotrus-g]

Hey, thanks for the response. Good to confirm that I'm not the only one having problem with spin-fit tips. Thanks for having Precog review the unit. I would consider your brand when I'm on the market for a multi-BA set again.

Thank you I appreciate it

 

[Skullar]

As I said before, I have not been able to hear a decisive difference between any IEM and source. Just subtle changes that have never changed my appreciation of the sound of an IEM from "like" to "dislike" or the other way around.

Do they sound different? Yes.
Is the difference decisive? Absolutely not.
IMHO

I am really surprised by this observation. I feel the source can make or break the synergy.

Im not going to try and convince you to agree with me obviously, but i find it quite surprising how our brain take everything in differently. Especially if you take into account some people who will swear by the scale of cable contribution to sound etc.

 

[firesign]

Not trying to be rude but this is n=1 approach.
There are IEMs that will change up to 6-7dB in bass response depending on the output impedance of the amplifier - there are IEMs notable for changing 180 degrees from source with 0,1Ohm output impedance and something that has say 6 ohms on the output.
Now if all your sources are 0,1 on the output or all the IEMs you tired are Dynamics, Planar or Flat impedance BAs, yeah you won't hear that much of a difference.
I'm speaking from a perspective of someone with access to GRAS coupler, sources with different OI and as someone who spent last 6 years voicing the importance of impedance in IEM development

[EDIT]I hope I won't be braking rules by linking this article: https://www.samma3a.com/tech/en/amplifier-impedance/ which supports my point with graphs

One of the first things I've made reference to is that I'm referring to good quality sources.
Obviously an IEM is going to sound very different connected to my DX300 or my laptop, in fact it always sounds worse connected to my laptop.

As a general rule (and with few exceptions) IEMs will sound worse connected to sources with a high output impedance, but I am implicitly ruling those out in my comment.

Usually that's the case, but there are some exceptions. IMHO, something extreme like E5000 or Andromeda can swing from like to dislike based on source. If you listen to E5000 on Apple dongle, you would correctly say it's a muddy mess. However, amp it up properly and it would sound entirely different, though the tonality stays the same (I did measure). Andromeda, on the other hand, changes tonality with slightest shifts in the OI.

I will always consider as bad an IEM that does not sound good in a good quality DAP, like the ones I am referring to in my comment.

The sources we are talking about have a low output impedance, and enough power for any IEM to sound correctly (look, for example, at the ones Fabio mentions in his comment).

I am really surprised by this observation. I feel the source can make or break the synergy.

Im not going to try and convince you to agree with me obviously, but i find it quite surprising how our brain take everything in differently. Especially if you take into account some people who will swear by the scale of cable contribution to sound etc.

I have always been surprised otherwise. But it's like you say, we each hear something very different...

Or not, because this kind of thing would be easily clarified with blind tests carried out under the right conditions. But those tests are never done...

PD: those tests have been done in right conditions, and have always resulted in people not correctly distinguishing between 2 sources of the same level, 2 cables, or even MP3-320 / FLAC (random songs), but it's better not to comment that here

 

[Precogvision]

Thank you very much for your impressions.
I tested U12t (and many others IEMs) and 7U had better and deeper sub-bass than U12t.
U12t is has warm sound with better soundstage, detail and separation.

Oh, that is interesting. Were you using the MX module with the U12t? That will roll off the sub-bass a bit. I have them for A/B and the U12t has significantly more sub-bass (and more of a focus on sub-bass in general) than the 7U with the M15/M20 modules.

Thanks for posting your impressions. I was thinking of going in blind for this iem but there seem to be a huge backlog at the moment. Would you say that the bass quality is comparable to mid priced hybrids like variations?

Yes, I think it's comparable in terms of bass quality overall. The Diva doesn't have the same sense of slam or decay that the Variations does, but its transients are less dry to me. The bass dial is another nice touch. The Diva on the highest setting almost makes the Variations sound a bit tame if you're into that.

@Precogvision I was going to tag you in this article and then I realised who wrote it That's a lot of 64 Audio CIEM though. If I pay the kilobuck price again, would you recommend a CIEM from 64 Audio in that price range (most likely A4s or A3t) or go with universal again (Monarch Mk2)?

I wouldn't really recommend the A3t/A4s in that price range. They're OK for CIEMs, but the value proposition with universals is higher. Maybe it's just the way the tia driver interacts with increased insertion depth of their CIEMs for me. Arguably, though, 64A's more expensive IEMs (specifically the universals) have better value proposition relative to other IEMs in their respective price ranges.

 

[o0genesis0o]

Oh, that is interesting. Were you using the MX module with the U12t? That will roll off the sub-bass a bit. I have them for A/B and the U12t has significantly more sub-bass (and more of a focus on sub-bass in general) than the 7U with the M15/M20 modules.



Yes, I think it's comparable in terms of bass quality overall. The Diva doesn't have the same sense of slam or decay that the Variations does, but its transients are less dry to me. The bass dial is another nice touch. The Diva on the highest setting almost makes the Variations sound a bit tame if you're into that.



I wouldn't really recommend the A3t/A4s in that price range. They're OK for CIEMs, but the value proposition with universals is higher. Maybe it's just the way the tia driver interacts with increased insertion depth of their CIEMs for me. Arguably, though, 64A's more expensive IEMs (specifically the universals) have better value proposition relative to other IEMs in their respective price ranges.

Thanks mate. I guess Monarch Mk2 then. Unless unique melody also establishes distribution channel in Aus, then I have to think again.

 

[Damz87]

Thanks mate. I guess Monarch Mk2 then. Unless unique melody also establishes distribution channel in Aus, then I have to think again.

Minidisc are now Australia’s authorised dealer for Unique Melody:

https://www.minidisc.com.au/unique_melody