{"id":26330,"date":"2026-04-12T16:13:15","date_gmt":"2026-04-12T15:13:15","guid":{"rendered":"https:\/\/gamerunlocked.pt\/?post_type=product&p=26330"},"modified":"2026-04-12T23:00:17","modified_gmt":"2026-04-12T22:00:17","slug":"truthear-keyx-cs43131-usb-c-dac-amp-dongle","status":"publish","type":"product","link":"https:\/\/gamerunlocked.pt\/en\/product\/truthear-keyx-cs43131-usb-c-dac-amp-dongle\/","title":{"rendered":"Truthear Keyx \u2013 CS43131 L-Shaped USB-C DAC\/AMP Dongle with Mic Support"},"content":{"rendered":"\t\t
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Truthear Keyx \u2013 CS43131 L-Shaped USB-C DAC\/AMP Dongle with Mic Support<\/h2>\n

The Truthear Keyx is a plug-and-play USB-C DAC\/AMP dongle built around the Cirrus Logic CS43131 \u2014 the same chip used in much more expensive standalone units. It takes the standard dongle format and eliminates the one thing that breaks first: the cable. The 3.5mm TRRS port is built directly into the L-shaped chassis, connecting straight to your phone or PC without any intermediate cable to stress or snap.<\/p>\n

CS43131 \u2014 The Chip That Matters<\/h3>\n

The Cirrus Logic CS43131 is a high-performance audio SoC with an integrated headphone amplifier \u2014 it handles both DAC conversion and amplification in a single chip, which is why it's so effective in compact dongles. In the Keyx, it delivers 122dB SNR, -107dB THD+N at 1Vrms into 32\u03a9 (dropping further to -112dB at 2Vrms into 600\u03a9), and an output of at least 50mW into 32\u03a9. That's enough to drive sensitive IEMs cleanly and push most portable headphones to useful listening levels. The CS43131 also includes feedback monitoring for headphone detection, which is why the Keyx can support microphone input \u2014 something DACs using chips without this feature cannot do.<\/p>\n

Maximum decoding: PCM 384kHz\/32bit and DSD256. Frequency response is flat across 20Hz\u201320kHz. In practice, this means the Keyx is not a bottleneck for any source you're likely to use.<\/p>\n

L-Shaped Design \u2014 Why It's Better Than a Cable<\/h3>\n

Most dongles in this price range attach to your phone via a short, flexible cable. That cable is a stress point \u2014 it flexes every time you move, and it's usually the first thing to fail. The Keyx eliminates it entirely by integrating the 3.5mm port directly into the body of the dongle. The L-shape means the USB-C connector goes straight into the port and the headphone jack faces perpendicular \u2014 a naturally ergonomic position whether the phone is in a pocket or flat on a desk.<\/p>\n

The construction is multi-injection molded plastic reinforced with a CNC anodized metal shell. It's designed to take the mechanical stress that previously went to the cable.<\/p>\n

Microphone Support \u2014 The Detail That Matters for IEM Users<\/h3>\n

Most budget DAC dongles drop the microphone signal. The Keyx uses a 4-pin TRRS output, which means if your IEM cable is terminated in TRRS (as most cables with in-line remotes are), your microphone goes through. Calls, Discord, voice chat, recording \u2014 it all works without needing a separate mic or adapter. The Keyx also supports online DSP, which means software equalizers and processing applied at the OS or app level work correctly without signal degradation.<\/p>\n

Founder's Take<\/h3>\n

The Keyx answers a question the IEM community asks constantly: what's the minimum DAC dongle that actually makes a difference without costing more than the IEMs? The CS43131 is a genuinely good chip \u2014 not a budget compromise, just a compact implementation of proven technology. The L-shaped no-cable design is the right call for a product that will live in a pocket or bag. Mic support is the feature most cheap dongles skip and the one most gamers and remote workers actually need.<\/p>\n

If you're pairing this with IEMs for gaming or for daily use on a laptop or phone, this is the DAC that does everything it needs to and nothing it doesn't.<\/p>\n

\u26a0\ufe0f iOS Note:<\/strong> Requires a Lightning-to-USB-C or USB-C-to-USB-C adapter for use with iPhones. Not included.<\/p>\n

IN THE PACKAGE<\/h4>\n
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  • 1\u00d7 Truthear Keyx DAC\/AMP Dongle<\/li>\n<\/ul>\n<\/div>\n\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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    SPECIFICATION<\/th>\nDETAILS<\/th>\n<\/tr>\n<\/thead>\n
    Model<\/td>\nTruthear Keyx<\/td>\n<\/tr>\n
    Type<\/td>\nUSB-C DAC\/AMP Dongle<\/td>\n<\/tr>\n
    DAC Chip<\/td>\nCirrus Logic CS43131<\/td>\n<\/tr>\n
    Max Decoding<\/td>\nPCM 384kHz \/ 32bit \u00b7 DSD256<\/td>\n<\/tr>\n
    THD+N @1kHz<\/td>\n-107dB @1Vrms \/ 32\u03a9 \u00b7 -112dB @2Vrms \/ 600\u03a9<\/td>\n<\/tr>\n
    SNR @1kHz<\/td>\n122dB @1Vrms \/ 32\u03a9 \u00b7 122dB @2Vrms \/ 600\u03a9<\/td>\n<\/tr>\n
    DNR @1kHz<\/td>\n122dB @1Vrms \/ 32\u03a9 \u00b7 122dB @2Vrms \/ 600\u03a9<\/td>\n<\/tr>\n
    Output Power<\/td>\n\u226550mW @32\u03a9<\/td>\n<\/tr>\n
    Frequency Response<\/td>\n20Hz \u2013 20kHz<\/td>\n<\/tr>\n
    Output Jack<\/td>\n3.5mm 4-pin TRRS (Single-Ended + Microphone)<\/td>\n<\/tr>\n
    Input Connector<\/td>\nUSB-C male<\/td>\n<\/tr>\n
    Design<\/td>\nL-shaped \u00b7 No cable \u00b7 3.5mm port integrated in chassis<\/td>\n<\/tr>\n
    Construction<\/td>\nMulti-injection molded + CNC anodized metal shell<\/td>\n<\/tr>\n
    Microphone Support<\/td>\nYes (TRRS 4-pin)<\/td>\n<\/tr>\n
    Online DSP<\/td>\nYes<\/td>\n<\/tr>\n
    Compatibility<\/td>\nAndroid \u00b7 PC (plug-and-play) \u00b7 iOS (adapter required, not included)<\/td>\n<\/tr>\n
    Product Weight<\/td>\n[VERIFICAR]<\/td>\n<\/tr>\n
    Dimensions<\/td>\n[VERIFICAR]<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"

    Key Features:<\/strong><\/h4>\n
      \n
    • Cirrus Logic CS43131 \u2014 Proven DAC Chip, Measurable Performance<\/strong> \u2013 The CS43131 is the same chip found in products several times the price of the Keyx. It delivers 122dB SNR and -107dB THD+N at 1Vrms into 32\u03a9 \u2014 measurements that hold up at any price point.<\/li>\n
    • L-Shaped, No-Cable Design<\/strong> \u2013 The 3.5mm port is built directly into the L-shaped chassis. No dangling cable between the USB-C plug and your headphone jack \u2014 less strain on the phone or PC port, less to break, cleaner desk.<\/li>\n
    • PCM 384kHz\/32bit & DSD256<\/strong> \u2013 Full hi-res decoding. Spotify, Tidal, Apple Music lossless, local FLAC \u2014 the Keyx handles everything your source can throw at it without downsampling.<\/li>\n
    • Microphone & Online DSP Support<\/strong> \u2013 The 3.5mm output is a 4-pin TRRS \u2014 it passes mic signal through. Your TRRS-terminated IEM cable works for calls and voice chat without a separate adapter.<\/li>\n
    • Plug-and-Play on Android, PC & iOS<\/strong> \u2013 No drivers needed on Android and PC. iOS requires a Lightning or USB-C to USB-C adapter. Works with streaming apps, DAW software, and online voice services out of the box.<\/li>\n<\/ul>\n","protected":false},"featured_media":26336,"comment_status":"open","ping_status":"closed","template":"","meta":[],"product_brand":[],"product_cat":[726,102],"product_tag":[1908,1907,1913,1915,1910,1914,1911,1912,1906,1909],"class_list":{"0":"post-26330","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-dac-amp","7":"product_cat-audio","8":"product_tag-cs43131-dac","9":"product_tag-dac-amp-dongle","10":"product_tag-dac-with-microphone-support","11":"product_tag-hi-res-audio-dongle","12":"product_tag-iem-dongle","13":"product_tag-lossless-audio-dongle","14":"product_tag-portable-dac","15":"product_tag-truthear-dac","16":"product_tag-usb-dac-dongle","17":"product_tag-usb-c-to-3-5mm","18":"pa_brand-truthear","20":"first","21":"instock","22":"taxable","23":"shipping-taxable","24":"purchasable","25":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/gamerunlocked.pt\/en\/wp-json\/wp\/v2\/product\/26330","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/gamerunlocked.pt\/en\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/gamerunlocked.pt\/en\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/gamerunlocked.pt\/en\/wp-json\/wp\/v2\/comments?post=26330"}],"version-history":[{"count":4,"href":"https:\/\/gamerunlocked.pt\/en\/wp-json\/wp\/v2\/product\/26330\/revisions"}],"predecessor-version":[{"id":26340,"href":"https:\/\/gamerunlocked.pt\/en\/wp-json\/wp\/v2\/product\/26330\/revisions\/26340"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/gamerunlocked.pt\/en\/wp-json\/wp\/v2\/media\/26336"}],"wp:attachment":[{"href":"https:\/\/gamerunlocked.pt\/en\/wp-json\/wp\/v2\/media?parent=26330"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/gamerunlocked.pt\/en\/wp-json\/wp\/v2\/product_brand?post=26330"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/gamerunlocked.pt\/en\/wp-json\/wp\/v2\/product_cat?post=26330"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/gamerunlocked.pt\/en\/wp-json\/wp\/v2\/product_tag?post=26330"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}