15% of 106 verified Letshuoer S12 Proowners don't recommend it — based on real owner comments from Reddit, enthusiast forums, and YouTube.
For balance: 66% recommend it. This page collects the complaints so you know what you're signing up for — read the full owner report for both sides. How we score
“The bass on most planars including the S12PRO decays quickly. Gives the entire sound profile a lighter note weight and no amount of tip rolling will change that aspect (I went through 12 pairs).”— StolenServiceAnimal on Reddit
“I just returned the s12pro. Maybe my ears are shot, but there was no usable bass eq. The treble was harsh, but I couldn't get over not hearing bass mostly. It sounded like my phone's speakers were placed in my ear.”— AnalysisSudden3305 on Reddit
“Letshuoer S12 pro without eq is one of the worst IEM I own and I will take KZ ZSN pro X and Final e500 over it”— Brilliant-Thing-9067 on Reddit
“The S12pro Aful P5 and the EA500LM mostly collect dust now adays not even playing in the same ball park.”— Direct-Can2792 on Reddit
“The **Letshuoer S12 Pro** was way too bright for me. I tore them out of my ears in frustration.”— steeze206 on Reddit
“I owned EA500 and s12pro, but both of them are not fit my ear as no ergonomic design..”— ronaldlcm on Reddit
“I thought S12pro was mid and the fitment was really loose for me”— PowerfulDisaster2067 on Reddit
“Like the Letshuoer S12 Pro sucked for me, as did the S08.”— Timely_Hope on Reddit
“I bought S12 Pro due to the hype a while ago and yeah my reaction was "they're mid". Tried EQ-ing, the sensible thing when you're not looking to buy quadrillion IEM's for no reason, nah, they're just meh and nothing would solve it.”— @3ildcard on YouTube
“it’s still a bright Planar set with that metallic timbre. It is not a safe rec for treble-sensitive listeners who want 'Groove'.”— Special_Screen_4980 on Reddit
“Good luck eq'ing the S12 Pro to taste compared to the Daybreak, same treble extension essentially yet far smoother.”— jiyan869 on Reddit
“Personally, I am sorely lacking in the high frequencies in the LetShuoer S12 Pro compared to the Sennheiser IE 300.”— Vlad Koon on Head-Fi
Not complaints — practical notes from owners that didn't affect the score.
“a planar like the S12 Pro isn’t inherently the wrong recommendation, just a higher-interaction one.”— Ecstatic-Menu-952 on Reddit