E-MU Teak Repair - Any Experience?
Hello, I am wondering if anybody has any experience contacting E-MU support, sending them headphones for repair, or getting them back fixed. Can anybody share any experience? I have been emailing them for a while now, but nobody has responded. Thank you.
Dec 29, 2024
- Well built
- Sturdily clicks into the USB-C port
- Unpretentious packaging and carry case
Cons:- Tops out at 24/96
- Output could be better
- Output impedance seems to be fairly high, affecting balanced armature IEM performance (Drop Plus, NuForce EDC3, Etymotic, Shure, Noble)
That last point was a real deal-breaker for me - output impedance is arguably the most important (and definitely among the most important) specs that something that may be used with IEMs can have, as it can drastically impact the performance of balanced armature IEMs. I could not find the output impedance of this device anywhere in the listing, and to my ears it is likely over 2-3 ohms. The "golden rule" says that impedance should be no more than 1/8th of the impedance of the unit. If this unit imparts >2-3 ohms of output impedance, anything with less than 16-24 ohms will be audibly impacted. Most BA IEMs specify the impedance at 1kHz, but unlike dynamic drivers, the impedance of BA IEMs isn't remotely linear. In fact, particularly with multi-driver units, the impedance looks like a crazy squiggly line, with parts of the curve going down to the low single digits. The Shure SE846 has an impedance of 5 ohms at 5kHz, 8 ohms at 10kHz, and 16 ohms at 100Hz. The Final Audio Heaven II has an impedance of 17 to 20 ohms all the way to 3kHz, but then it shoots up to 50 ohms at 10kHz. If a devices output impedance is greater than 1/8th of the lowest possible impedance, you'll start to hear those frequency ranges become impacted: the SE846 will have this odd lower-treble suck-out, and the Heaven II will sound like an ice-pick to the ear. The Campfire Andromeda sounds like a freakin' laptop speaker if the output impedance of what it's plugged into isn't approaching zero. I used the Alpha & Delta with a Drop Plus IEM and an Etymotic ER-4XR - two exceptional BA IEMs that aren't in flagship territory. What's great about these two BA IEMs is that the sound signature doesn't become unusable if the output impedance is too high, although the impact is indeed audible. Plugging those to sets into the A&D, the Plus became appreciably warm and perhaps a little too muted on the top end, and the ER-4XR became somewhat leaner than usual (with the ER-4XR having an impedance of 42 ohms up to 1kHz, the A&R's OI could even be 6-7 ohms). There is absolutely no detriment to having an output impedance of 0.5 ohms or lower on a portable listening device, and I don't know why companies release products that have anything above it. While the perceptible differences between 24/96 and 24/192 can be discussed till the cows come home, many similarly-priced alternatives to the A&D have access to the full 24/192, and that's slightly disappointing. Not a big deal in a practical sense, but worth pointing out. I also felt that the A&D had about as much volume on tap as any old phone with a headphone jack - not particularly lacking, but not particularly copious either. While I was perfectly happy with the A&D, how my Plus and ER-4XR reacted to it had me pull the trigger on an Hidizs S3. My freaking god. While I'm not positive what the output impedance is on the S3, my Drop Plus sang like it does when plugged into my Chord Mojo. Incredible. The ER4-XR did not have a hint of leanness. The S3 also had 4 or 5 "extra clicks" of power in reserve as well. The A&D was built better than the S3 however - in particular, the A&D clicked nicely into my phone's USB-C port, whereas the S3's a little wobbly. The cable and both jacks seem much sturdier on the A&D than they do on the S3. Other than build quality, the S3 smokes the A&D in every way, and it's not even close. How, the A&D is $25 plus whatever the shipping charge is, plus a considerable wait. The Hidizs (what a stupid name) S3 is currently $45 with a coupon and Amazon Prime shipping. I'd say for the extra $20, you'd be nuts not to go for the Hidizs S3. That said, the extra $20 is about twice the price of the A&D, so it's a considerable jump in price if you look at it like that. Is the Hidizs S3 worth twice as much as the Alpha & Delta Type-C adapter? I'd say yes. But you get what you pay for in either case. This may come across as an overly negative review and/or an add for the S3, but a lot of my complaints are about industry practices as a whole and not the A&D in particular. For $25, you're going to get a decently performing USB-C mini-DAC that's well built. If you're willing to double your investment, you're going to be able to get something exceptional. Do with that what you will.