“Hard to tune” just means that it either doesn’t respond well to simple tuning foam and paper mods or that its frequency response is unusual in some way making normal tuning efforts counter productive. That 150Ohm and there’s a 32 Ohm with a red dot and large solder tabs which are easy to tune. The 150 Ohm is found in buds costing $150—also in much cheaper buds as well like the FAEAAL Rosemary (where it’s not particularly well tuned). It’s very good even just assembled with the included parts. It can certainly be improved, but it’s hard to go wrong with it. The red dot will get you a bit more bass, but less resolution and soundstage. It’s not bad in those departments either, but not as good as the 150. The 32Ohm Blue Glue mentioned earlier comes in $75 buds with just stock tuning also. I prefer the red dot to it, but it can be tuned to sound much better than its stock tuning, but requires advanced tuning methods to get it to sound its best. No matter what the treble isn’t the kindest and its soundstage is pretty flat. It is incredibly efficient though and that makes it nice for certain situations. Just get the 150Ohm and be happy you have probably the best bargain in audio.
the stock configuration actually measures better than the $150 version and I prefer it. It can still sound very good with a 1V source like a dongle…. Maybe it’s a bit better with 2V.
