Crosspost from water cooler, some parts have been cut to stay on topic
So there has been an on-going situation with my Aroma Jewel that I wanted to share with everyone, since people keep asking me about it and I'm tired of retelling it. The following story is told exactly how I experienced it from my perspective. I tried to remain factual and to cut out any hyperbole, you can decide for yourself how I should feel about this situation.
September of 2022 I bought the universal Jewel from my buddy TGXear because it was an incredibly good deal within Canada and I wanted to give it a chance as this was at the height of Jewel's popularity. Originally I wanted to grab it so my local Toronto head-fi friends could hear it, because I figured I could always just sell it and move on if it didn't blow me away. Unfortunately, I loved it. I got to experience Jewel with my home set up under perfect conditions and was blown away by how good it was.
Loved it and decided to go custom because I prefer CIEM fit. This is a service that Aroma officially offers. I asked for empty shells to test for fit which Aroma printed using my STL, impressions that I had taken right after NYC 2022. They charged 1,499.00 HKD for the test shells, which is 190 USD. I got hit by customs for the full value of the test shells unfortunately because the package was labeled as "headphone".
They sent the test shells, I confirmed the fit and requested some minor adjustments. I sent my UIEM Jewel in along with my old Noble 4C so that they could use it for reference when adjusting the fit. They received it on November 14, 2022. I told them the design I wanted for my CIEM and then waited.
3 months later with COVID, Christmas, New Year, Lunar New Year, the Jewel was completed! I paid for the service AFTER it was completed, the price to convert UEIM to CIEM was 3,925.00 HKD which is 500 USD. I received it back on February 13, 2023.
To my disappointment, there was an issue with the left IEM after getting it back in custom. No issue with the right side at all. Basically, being plugged into any powered source would cause an uncomfortably loud humming sound from the left IEM. It was loud enough to be heard over my music, and was quite frankly unusable. There was no problem with it when plugged into a DAP, so long as the DAP didn't have a charger plugged into it.
This issue was so sensitive that I could get it to hum/buzz just by having the Jewel in my ear, 4.4 unplugged from any source, and then touching a power cable with my finger. So basically it was impossible to use with my desktop RME ADI-2 DAC FS, which even has a Super Low Noise IEM Output. Keep in mind this is not the only IEM I own, but this is the first time I've ever had this happen. I am primarily a desktop user so this was unacceptable for my use case.
I asked if anyone I knew who owned a CIEM Jewel had this issue, to which everyone replied no. I also asked if any Universal Jewel owners had this issue, because I didn't hear the noise when I had it as a universal. Obviously if I did, I wouldn't have asked to convert it to CIEM. I reached out to Aroma, asking them the cost and time to repair this issue.
Their response was to assure me that this problem has nothing to do with the IEM and that it is due to the power source's transformer.
I made a video with my poor Cantonese skills explaining how I could get the left IEM to buzz even just by touching a power cable with my finger. They agreed to take a look at it after seeing the video. I sent it back to them after NYC and asked if they could repair it to hand deliver to me in Singapore. They obliged despite the rush turnaround which I appreciate and did not charge me for this. This left them with only about 3 weeks to repair the IEM. They received it on March 6 and I left them alone until I followed up on March 17.
They said they found no issue with it during diagnosis and didn't open it up to check anything. Now I understand that they are hesitant about replacing parts without being able to diagnose it, so okay I will go talk to them in person.
So I met up with them on Saturday at CanJam SG with 0 expectations. I have to preface this by saying that their English wasn't good enough to talk about electrical theory and audio, whereas my Cantonese wasn't good enough to talk about electrical theory and audio, so we were having some trouble communicating. I try the Jewel and can immediately hear there is still an issue. Mind you this is a noisy show floor so it was difficult, but definitely could tell it was there.
From the gist of it, what I understood was that they told me the following:
This is normal behaviour when plugged into a powered source, the noise is coming from the source's transformer.
There is nothing they can do to fix this as it is normal.
They had everyone in the lab try to listen for the noise with my CIEM but couldn't hear it.
They suggested that it may be due to my hearing sensitivity to this sort of noise and even suggested that I go buy a power conditioner as the solution.
I took it back to my hotel that night to try on my DAP while charging, and it was so loud and uncomfortable I had to take it out of my ear within seconds. I inserted the CIEM upside down as well and held my ear closed to emulate a "force fit", to see if I could hear it without the perfect deep insert fit as I would experience with CIEM, and I could absolutely still hear it despite being faint. Taking this home with me to my RME would not be productive.
I showed it to another IEM manufacturer and they looked inside the translucent shells with a flashlight and said that they saw the EST transformer touching another driver. Immediate diagnosis for a potential cause.
I also tried to use it to test some cables, and just by having my DAP on the table, maybe due to all the plugged in devices nearby causing interference, I could hear the left side buzzing. This was the last straw for me so I went back to Aroma's booth and told them I wouldn't be taking it home with me in this condition. I said if this still doesn't fix it I will send it back to you to convert to universal so I can sell it.
They ended up agreeing to take it with them back to Hong Kong and actually open up the left side this time, free of charge, to re-diagnose it. I told them that someone said the EST transformer was touching another driver, as well to just in general to be more careful with the wiring and positioning of components.
Imagine had I not flown halfway across the world how much more of a struggle this would have been to communicate. Now I am waiting for Aroma to complete the rebuild to see if the Jewel still has any issues.
As for my personal response, emotions and all:
I honestly don't have very high hopes here, and have pretty much accepted the monetary loss. Maybe I'll try to sell it if someone else wants to take the risk.
I have been on this CIEM journey since 2016, and have acquired 6 of them now. Since then I have made great connections and relationships with many Head-Fiers, many of them representing IEM manufacturers. I've still had to pay for repairs and service, but I have never once been told that it cannot be fixed.
Maybe it was the language barrier; they seemed friendly enough and were helpful, just in the wrong way. It was a lot of effort for me to convince them to take the IEM back to rebuild. It's fine if they can't diagnose it but that doesn't mean there isn't a problem.
This experience, regardless of who is at fault, has left a very sour taste, despite the fact that CanJam was supposed to be a celebration of the hobby. This IEM was not cheap and has honestly turned me off from IEMs in general.
If you want to buy a Jewel, let me know. It works fine, at least according to Aroma.
I'm curious what you'd think of it. Also pulling the traillii out of your ears wow.
