One angle I’d check that @nachtschatten didn’t really touch is source chain mismatch. The EW300 is easy to drive, so if it suddenly sounds thin, splashy, or channel-weird, sometimes the culprit is the dongle, amp output, or even software balance/EQ getting changed without you noticing.
Try this:
- Plug the EW300 into a totally different source, ideally straight from a phone, laptop, or another dongle.
- Turn off all EQ, spatial audio, Dolby, game mode stuff, and accessibility balance settings.
- Swap left/right at the source end if your cable allows it, not just at the ears. If the issue follows the side, that tells you more than reseating tips again.
- Compare with another IEM or headphone from the same source. If both sound off, it’s not the EW300.
- Play a slow sine sweep or mono vocal track. If one side jumps in volume only at certain frequencies, that smells more like a filter/driver problem than cable.
I’ll mildly disagree with the “intermittent usually means connector” idea, because intermittent can also be a partially clogged nozzle filter that shifts as you move. Not rare.
If you do end up replacing anything, the pros of the “” are readability and easy pairing in setups, but cons are basically none because there’s no actual product title there to evaluate.
For the Simgot EW300 specifically, pros: usually strong clarity, good value, easy to source cables/tips. Cons: fit sensitivity, nozzle/filter issues can mimic driver failure, and hybrid/DD sets can be annoying to diagnose when they go half-wonky instead of fully dead.