JH Audio JH-13 PRO appreciation thread

[relishmalice]

Does it really matter whether the dams are made of cotton or foam? My audiologist doesn't have the cotton ones but assures me the foam won't tear the end of the canal.

[LeeMark]

Originally Posted by relishmalice

Does it really matter whether the dams are made of cotton or foam? My audiologist doesn't have the cotton ones but assures me the foam won't tear the end of the canal.

I used foam dams and it worked out fine. They just recommend cotton so they don't rip out at the ends. I think the foams will be OK.

[3X0]

Looks like a lot of people just recently made the right choice.

JH13s in my scarce free time are possibly the only things keeping me from falling into insanity.

[KLS]

For JH Audio products, what is the correct way to do an impression?

What I mean is during the process making impression, should we use a bite-block, or open your mouth widely, or open your mouth a little just for 30secs?

[relishmalice]

Originally Posted by KLS

For JH Audio products, what is the correct way to do an impression?

What I mean is during the process making impression, should we use a bite-block, or open your mouth widely, or open you mouth a little just for 30secs?

Following their guide, you should use the bite block(typical size around 1 inch) for the entire process (ie. 5min or however long the material takes to harden)

[Happybottle]

Don't be surprised if the audiologist tells you that you don't need a bite block. If it's a big deal to you, make sure over the phone that they will or will not be using a bite block. My guy just had me keep my mouth open so that there was about an inch gap between my teeth.

[KLS]

Actually I asked this question is because different companies (like JHAudio and FitEar) ask their customers to do impressions in their own ways.

Like for JHAudio, yes I noticed that they stated on their webpage that to use a bite-block when making impressions. But for FitEar (a Japanese company), they ask customers to repeat openmouth-closemouth for 3 times, then move your jaw left-right for another 3 times, and after that keep closing your mouth until impression is done.

I realised that perhaps different companies have different ways of making the shells, but I am just wondering are there any sonic differences between an opened-mouth impression and a closed-mouth impression? But for the case of JHAudio, it seems almost everybody is making impressions using a bite-block for the entire process.

[cujobob]

I would guess there is no perfect way...if you do as Fitear suggests, you'll get a good all-around fit, but it won't be perfect in any situation (chewing, not chewing, smiling, etc.)

A closed mouth impression is probably the best for a person that normally listens to music with their mouth closed (duh ), but won't be ideal when doing other things. There's a tradeoff no matter how its done ...in my opinion, of course.

[moseboy]

Sorry for the long post, but I figured everything is relevant. This is an e-mail conversation between Jerry and I (read top to bottom).

Originally Posted by moseboy

Dear Jerry,

I realize you are incredibly busy, so I will try to make this short. I am a potential customer interested in the JH13 Pro. I have read quite a bit about these in-ear monitors and I am very impressed by how much users praise them. In fact, only one comment that I've read so far has made me question the JH13's perfection:

"My only real worry about the product is the fact that the TWFK driver is mounted directly in UV material. (plastic) The problem with this is that BA drivers are acceptable to shock damage.
Most IEMs have their drivers in a “floating” position inside the IEM shell. The sound tube acts as a shock absorber, adding some dampening protection to the BA drivers.
With the JH13 the TWFK does not have this luxury, because of how it is mounted in the shell, any shock to the shell will be sent directly to the TWFK. Essentially there is no shock dampening/protection for the TWFK BA driver.
Will this decrease the life of the TWFK? One would expect so, and only time will tell. But it would be wise to treat them with “extra” care and try your best not to drop them. (Hard for me to do, I often drop my IEMs)"

This post was apparently made by an audiologist (who I do not, by any means, consider a credible source). The link to the original post is here:

My Thoughts on JHAudio’s JH13 Pro IEM | Threadbox.net

Knowing that I will probably end up purchasing it regardless, how accurate is this post about the JH13 Pro?

Sincerely,
[moseboy]

Originally Posted by Jerry Harvey

Hi [moseboy],

1st off the driver is not a TWFK. Nice guess though. The high driver is a propietary design built just for JH Audio.

Secondly all of the 25,000 plus pairs of custom IEMs I have built over the years have the drivers bonded to the shell. If they are not bonded they resonate and rattle, not a very nice sound unless you are building a maraka ,

Also there is a 2 year warranty on the earpieces if the driver was knocked out of alignment.

Best regards,

Jerry

Originally Posted by moseboy

Jerry,

Thank you so much for the quick response. A couple more questions if you don't mind. First of all, do you mind if I post that reply publicly (to Head-Fi)? Like me, there are some other users that read that "audiologist's" post and were concerned because of what it claimed about the JH13. Second, I have been told that the JH13 has a deliberate frequency response peak at about 50 Hz (which I may enjoy). What I didn't know is that the JH13 was (apparently) designed to be a stage monitor. I thought it was supposed to be a studio monitor like the UE-10 Pro. Do you ever plan on releasing a version like the JH13 Pro that is reference quality?

Thanks

Originally Posted by Jerry Harvey

Hi [moseboy],

The 13 was designed to be the most accurate and detailed earpiece available. It did not start as a live piece but before I sold it as a live piece, I had to mix on it. I have never sold a earpiece to the live market that I personally have not mixef on.The 13 translates to both live and to mastered music. i believe the 13 is more of a reference earpiece than the 10. This is because of how accurate the frequency response is combined with the much faster transient response. The 50hz bump is so low that it adds only the mpact that a mixdown engineer wanted in the studio without the masking mid bass frequecies that are way to loud in most IEMs.

The bottom line is no matter if it is live or mastered music the 13 does a great job. You get out of it exactly what you put into it.

The JH16 on the other hand was designed to be a live earpiece 1st. The 16 is a 8 driver earpiece that is built for the loud bands. It is still accurate and has a fast transient response but is built for headroom.

Feel free to post any of this.

Best regards,

Jerry

[Hotdoggie]

WHAT?! There is a JH16?

[KLS]

JH16...
I think it would be a couple of years ahead...

[HeadphoneAddict]

JH16 - wow...

[moseboy]

Originally Posted by Hotdoggie

WHAT?! There is a JH16?

And so it begins....

[toughnut]

JH16.... Total of 16 BAs madness. I wonder how big it will turned out lol. Nice stuff from JHA!

[Solid Snake]