Letshuoer S12 Pro in-Ear Monitor 14.8mm Planar Magnetic Driver HiFi Earphone IEM with Detachable 2Pin Silver-Plated Monocrystalline Cable for Audiophile (Deep space blue, 2.5mm/3.5mm/4.4mm swappable)

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There are multiple vents on the front and rear cavities, which DUNU says constitute a special multi-venting system, contributing to strong dynamics and robust low-frequency response. Isolation is hence bang average due to the venting. The S12 is a slightly warm and very enjoyable set of earphones that balances its sound signature between sounding reference and musical while retaining good levels of transparency and technicalities.

S12 - my thoughts (vs. Timeless, Blessing 2 - Reddit Shuoer S12 - my thoughts (vs. Timeless, Blessing 2 - Reddit

The S12P isolates about as well as any iem on the market. Nothing to write home about, let’s just put it that way. Honestly when music is playing you can’t hear anything but the music. I suppose these would be fine for out and about listening but don’t think they isolate the outside world like a proper ANC set. For myself I get a great seal and isolation is above average. The P1 MAX from TinHifi is another example of a budget friendly earphone with a planar magnetic driver that has an admittedly great audio performance for the price.The lower treble continues on from the slight bump in the upper midrange. In pure planar mode, the treble extension is decent. It could be more airy and sparkly, but it balances a fine line between being forward and getting some micro-details in without fatigue. In the exclusive planar mode, sibilance is mild. Comparisons I love the design of this set. I’d be lying if I said I didn’t twist them around in my hands looking at them from different angles. The Matte finish is the perfect finish, and the choice of aluminum is as much sturdy as it is light. Whoever took part in the design should get a raise… Letshuoer let’s make that happen. Build

Letshuoer S12 PRO Review - Top Audiophile Reviews Dacs | Daps Letshuoer S12 PRO Review - Top Audiophile Reviews Dacs | Daps

It need not be emphasized that 2022 is the year of planar IEMs. Chi-Fi companies all want a piece of this lucrative pie, and it is no exaggeration that almost every week brings a new planar release. Mids - female and male vocals are very enjoyable on this set, delivery is clean, clear and concise voice. Brightness and tonality is just right. female vocals will sound better for this set especially, on my preference for audiophile female singers. S12 Pro’s aluminum chassis is shaped to have a snug fit in the concha. The finishing is smooth to the touch thanks to the five-axis CNC machining process. It’s strong, touch and without sharp edges. The chassis comes in a minimalistic profile, with not a lot of wiggle room within the acoustic chamber to minimize reverberation. Dual-pin receptacle is a separate piece protruded from the faceplate so that the irregular shape would not cause distortion.The sub-bass on the P1 MAX rolls a little earlier while the bass is leaner and drier sounding but with a touch of extra control and clarity compared to the S12 PRO which is fuller and weightier but more hollow and looser. The S12P uses a custom 14.8 mm Planar diaphragm which I believe is the same diaphragm as its predecessors. The chassis housing the driver is said to have independent front & rear acoustic chambers, as well as multiple vents to alleviate pressure build up and from what I read in their advertising, these help for a more consistent channel matching. Isolation & Fit

Letshuoer S12 Pro Review - Major HiFi Letshuoer S12 Pro Review - Major HiFi

Detail Retrieval & Resolution: On par with sets like dioko, which means it has great details for its price, tho some might say dioko has better details due to its unnatural peak on the 8khz region forcing the treble to stands out like a sore thumb. What happens though is that the timbre is just a touch metallic and artificial while the S12 PRO is not that resolving and refined in the treble as in the mid range. IMHO, I can't find a fault or a reason on not to recommending the PR1 Pro especially at this price besides wishing it comes with a pouch for carrying the IEM, but for the sake helping the community :

Tonality in General : I'd say the PR1 Pro is Neutral with bass boost, balanced, very dynamic sounding, heavy slamming bass, not overly forward mids, and zero peaks forward treble but not presented in the usual v-shaped manner. The treble on the S12 PRO is well extended and clear with good detail retrieval that doesn’t resort into becoming analytical.