We spent some time at CanJam NYC 2023 with the LETSHUOER team and throughly enjoyed our opportunity to try the new Cadenza 12 IEMs that will set one back almost $2,300 USD; which is a lot of money for a pair of universal IEMs. Before we left the booth, we were handed a pair of inexpensive IEMs to try because the company has really earned its reputation creating universal IEMs below $400 and the Head-Fi crowd has always been rather bullish on the original S12 IEMs that utilized a planar magnetic driver for under $200.
The new S12 Pro are designed to give Linsoul and FiiO some competition in this category and that’s a really good thing for consumers who still desire a pair of wired IEMs and don’t have a huge budget.
LETSHUOER have been producing high-quality in-ear monitors (IEMs) since 2016. The S12 Pro, build upon the success of its ever popular S12’s and feature a custom 14.8mm planar magnetic driver that delivers stunning detail with a punchy, taut bass, defined mid-range, and clear treble.
Thanks to the S12 Pro’s sensitivity of 102db, they are able to pair well with a host of different devices, including DAPs, laptops, smartphones and portable DACs.
Constructed using a five-axis machining process, the S12 Pro’s smooth Deep Space Blue aluminium chassis has been meticulously designed to deliver a snug, comfortable fit.
By featuring multiple vent holes on both sides, the audio engineers at LETSHUOER have worked to alleviate any negative pressure build-up within the ear canal that can be sometimes be experienced when wearing IEMs for extended periods of time.
In addition, the minimalist profile of the S12 Pro chassis — together with an independent rear acoustic chamber — minimises unwanted reverberation and produces a natural, open soundstage.
To further ensure unwanted distortion is avoided, the S12 Pro’s dual-pin cable connectors have been tooled as a separate element of the chassis, angled away from the faceplate.
The cable supplied with the S12 Pro is constructed from silver-plated monocrystalline copper and comprises four 98-strand cores, woven together, for a total of 392 separate strands.
Detachable from the S12 Pro IEMs thanks to the standard 0.78mm dual pin connectors, the source-end of the cable features a modular design which allows the user to swap out a number of various jack-types, dependent upon what source equipment is being listened to.
2.5mm balanced, 3.5mm single-ended, and 4.4mm balanced modular connectors are provided.
Specifications:
| Headphone Type | In-ear Monitors (IEM) |
| Drivers | Custom 14.8mm Planar Magnetic |
| Sensitivity | 102dB |
| Impedance | 16 Ohms |
| Frequency Response | 20Hz – 20kHz |
| Cable Composition | 392-strand Silver-plated Monocrystalline Copper |
| Detachable Cable | Yes |
In the Box
- 1 x LETSHUOER S12 Pro IEMs
- 3 x Foam Tips (S/M/L)
- 3 x Black Silicone Ear Tips (S/M/L)
- 3 x White Silicone Ear Tips (S/M/L)
- 1 x Headphone Cable
- 1 x 2.5mm Balanced Modular Jack Plug
- 1 x 3.5mm Single-ended Modular Jack Plug
- 1 x 4.4mm Balanced Modular Jack Plug
- 1 x Leatherette Carry Case
Price & Availability
The LETSHUOER S12 Pro are available now for $149 at Amazon.com in nebula grey or frosted silver or £169 at Amazon.co.uk.
Related reading: LETSHUOER Announce Cadenza 12 Flagship IEMs
