I decided to go hog wild and just get a pair of Campfire Andromedas. Go big or go home I guess.
Good:
- Sound signature is sort of like the Sennheiser HD600 with more bass, tighter bass and what feels like slightly more air. I think the HD600's sound signature is pretty much perfect except for its pretty muddy bass.
- Its so sensitive that it sounds great out of anything. Expensive amps with near-zero output impedance probably make it sound worse.
- Packaging is very compact and smart. The IEMs come inside the case, which sit ontop of a dozen different eartips and documentation. It makes keeping everything together for warranty/selling purposes very easy.
Bad:
- The provided protective case is compact but I don't like it. The IEMs with tips installed are too small for the case. I don't think there's any way to put the IEMs in the case without the case putting pressure on the tips.
- Machining quality on my sample is pretty poor. The two part shell on mine is not flush, has a machining over-cut, and the edges shed paint like the iPhone 5. It doesn't bother me enough to return it but I dunno how these shells got through QA.
- The crazy high sensitivity means its a hiss magnet. It has hiss issues out of the AudioQuest Dragonfly Red, Oppo HA-2, Chord Mojo, Sony A20, Nintendo 3DS. It doesn't hiss out of the iPhone 6S strangely enough.
Ugly:
- The crossover network and resulting impedance curve is crazy. I think it sounds too bassy out of most audiophile amps. If you try and use a 20 ohm impedance booster (aka adding resistors in series) to mitigate the hissing issue, you end up with zero bass.
- I can confirm that soldering together a
voltage divider does do a fair bit to mitigate the hissing issue without adding excessive amounts of output impedance.
- Because of this and the hissing issues, the iPhone 6S actually produces the best sound if you don't want to mess around with soldering irons and adapters.
All in all, great sounding IEMs that show 95% of getting something to sound good is targeting a sensible target curve.