Letshuoer S12 Pro in-Ear Earphone with 14.8mm Planar Magnetic Driver, HiFi Headphone, Ergonomic Design, Wired in Ear Monitor with Silver Plated Monocrystalline Copper Cable (S12 Pro,Blue)

As a professional musician, I've only had three pairs of IEMs over the years. The first pair was the Shure 425, the second was the KZ ZS10 Pro X, and this is the third. I was quite satisfied with the KZs; they were superior to the Shures, which eventually broke. The plastic housing of the Shure earbuds fell apart. In comparison, the KZs had a fuller and louder sound, and I felt like I could hear more of everything during live performances.Unfortunately, I've either lost my KZs, or they've been misplaced or stolen. Nevertheless, I'm interested in trying a pair of Planar headphones. The Letshuoer S12 Pro keeps appearing on various review sites, so I've decided to invest the extra money and give them a try.Initially, I was concerned about the sound quality of these headphones. In my setup, we use a headphone mixer that's been calibrated to a specific gain volume, which I've been accustomed to with both Shure and KZ headphones. However, these Planar type IEMs require a bit more gain. But once you increase the volume—wow! Typically, I set the gain at around 9 o'clock on the knob for Shure and KZ, but for these, I need to adjust it to about 11 or 12 o'clock to achieve the same volume level. The sound is rich and full. I have no intention of returning them. I appreciate that they include three pairs of foam and six pairs of silicone ear tips, along with a high-quality cable that I see no need to replace. They also come with three different audio input tips for various connections, and a nice case with an inner pocket to store the tips or other small items. Overall, I'm very pleased with the price and the included accessories.

Sencillamente extraordinarios, me gusta escuchar jazz, clásica y se escucha muy bien . El cable importante. Definitivamente una excelente compra. No se arrepentirá.

(Amazon disclaimer: The product page is conflating two models. I ordered and am reviewing the S12 Pro model, not the regular S12.)I got these as a spiritual replacement for my 7Hz Timeless, which I unfortunately had to return after ~50 days due to QC issues. What started out as driver flex turned into a rattle during playback, at which point I knew they were gone.Not wanting to risk another QC issue, I sprung for these instead. Right off the bat I want to belay a few fears: The Timeless had quite a spike in the treble region, which was off-putting for a lot of people. I find myself agreeing with crinacle, that it was on the verge of being too shrill. He also stated the regular S12 was over that line for him- I can't speak to that because I haven't tried them.The treble spike in these is definitely present, as it was in the Timeless, but I don't feel it crosses the threshold into uncomfortable. (It might even be tamer than the Timeless, but it's been too long for me to judge.) Specific songs and instruments will get closer to it than others, but broadly speaking I don't find these fatiguing at all.Comfort: I found the Timeless to be incredibly comfortable, I could sleep with them in, by contrast these have slightly longer stems and don't sit as flush in my ear. I don't find these *uncomfortable*, their size and shape still fit very well in my ear, but I can't lie on my side with them in. I appreciate a pair of headphones that only take up as much space as they really need internally, and these definitely hit that mark. (That being said- the stock cable is a bit heavy. Get a Tripowin Zonie. I do appreciate the inclusion of a balanced cable, though.)QC: My left side has driver flex, it clicks when there's a pressure differential. It seems to be a common complaint, though at least presently it is not affecting sound quality (I really hope it stays that way).

I thought it was 3.5mm and had to return it.

Found these by accident, a 14.9mm driver for under £100. I am an audiophile and somewhat of an expert on headphones after investing over £300 on several over the ear studio headphones for producing music so clarity and a flat response is essential.I have tried several IEM’s and rate the CCA 10’s for a decent sound quality under £50 but these Let Shuoer S12’s have a superior sound with the huge 14.9mm driver. You need no extra bass on the EQ as these produce a rich sound without having to crank the volume and potentially damage your hearing. I was instantly impressed with the quality and comfortable fit of all the IEM’s i’ve tried including the Shure 615’s that ha nothing like the bass response these S12’s have.Comes in a iPhone type box expertly engineered so the box drops super slowly from the lid as Apple has done with their packaging.The S12’s come with a hard ish carry case with a loop to attach a belt clip and 3 sets of ear buds, memory foam, clear plastic and rubber.10/10 phat sound with no need to add low end EQ10/10 Perfect fit10/10 high quality cable10/10 no flash printing just expertly made IEM’sGet them while they are on offer. Also big thanks to Amazon’s returns policy, giving you the option to try out products until you’re perfectly satisfied as I am with these amazing In Ears.Another brilliant product supplied by Amazon’s super fast delivery service.