{"product_id":"u18s-balanced-armature-iems","title":"U18s Balanced Armature IEMs","description":"\u003cbuilder-component rev=\"a4apysf501u\" api-key=\"48d1cdcd52ec4d289f1ef8c4f75da167\" options='{\"locale\":\"Default\"}' name=\"product-description\" entry=\"b0561e16d691478194b9ee86afbcc572\"\u003e\n\n\u003c!-- ***** Generated by Builder.io on Tue, 07 Apr 2026 14:45:41 GMT ***** --\u003e\n\n\u003cstyle type=\"text\/css\" class=\"builder-styles builder-api-styles\"\u003e\/*start:h47494*\/.css-h47494{display:-webkit-box;display:-webkit-flex;display:-ms-flexbox;display:flex;-webkit-flex-direction:column;-ms-flex-direction:column;flex-direction:column;-webkit-align-items:stretch;-webkit-box-align:stretch;-ms-flex-align:stretch;align-items:stretch;}\/*end:h47494*\/ \/*start:1nokf2l*\/.css-1nokf2l.builder-block{display:-webkit-box;display:-webkit-flex;display:-ms-flexbox;display:flex;-webkit-flex-direction:column;-ms-flex-direction:column;flex-direction:column;position:relative;-webkit-flex-shrink:0;-ms-flex-negative:0;flex-shrink:0;box-sizing:border-box;margin-top:20px;line-height:normal;height:auto;margin-right:200px;margin-left:200px;margin-bottom:25px;}@media only screen and (max-width:991px){.css-1nokf2l.builder-block{margin-left:20px;margin-right:20px;}}\/*end:1nokf2l*\/ \/*start:1qggkls*\/.css-1qggkls{outline:none;}.css-1qggkls p:first-of-type,.css-1qggkls .builder-paragraph:first-of-type{margin:0;}.css-1qggkls \u003e p,.css-1qggkls .builder-paragraph{color:inherit;line-height:inherit;-webkit-letter-spacing:inherit;-moz-letter-spacing:inherit;-ms-letter-spacing:inherit;letter-spacing:inherit;font-weight:inherit;font-size:inherit;text-align:inherit;font-family:inherit;}\/*end:1qggkls*\/ \/*start:1oskows*\/.css-1oskows.builder-block{display:-webkit-box;display:-webkit-flex;display:-ms-flexbox;display:flex;-webkit-flex-direction:column;-ms-flex-direction:column;flex-direction:column;position:relative;-webkit-flex-shrink:0;-ms-flex-negative:0;flex-shrink:0;box-sizing:border-box;margin-top:20px;line-height:normal;height:auto;margin-right:200px;margin-left:200px;margin-bottom:35px;}@media only screen and (max-width:991px){.css-1oskows.builder-block{margin-left:20px;margin-right:20px;}}\/*end:1oskows*\/ \/*start:117k06z*\/.css-117k06z.builder-block{display:-webkit-box;display:-webkit-flex;display:-ms-flexbox;display:flex;-webkit-flex-direction:column;-ms-flex-direction:column;flex-direction:column;position:relative;-webkit-flex-shrink:0;-ms-flex-negative:0;flex-shrink:0;box-sizing:border-box;margin-top:20px;line-height:normal;height:auto;margin-left:200px;margin-right:200px;text-align:center;}\/*end:117k06z*\/ \/*start:1n2binq*\/.css-1n2binq.builder-block{display:-webkit-box;display:-webkit-flex;display:-ms-flexbox;display:flex;-webkit-flex-direction:column;-ms-flex-direction:column;flex-direction:column;position:relative;-webkit-flex-shrink:0;-ms-flex-negative:0;flex-shrink:0;box-sizing:border-box;margin-top:20px;margin-left:200px;margin-right:200px;margin-bottom:25px;}\/*end:1n2binq*\/ \/*start:1840m1q*\/.css-1840m1q{display:-webkit-box;display:-webkit-flex;display:-ms-flexbox;display:flex;}@media (max-width:999px){.css-1840m1q{-webkit-flex-direction:column;-ms-flex-direction:column;flex-direction:column;-webkit-align-items:stretch;-webkit-box-align:stretch;-ms-flex-align:stretch;align-items:stretch;}}\/*end:1840m1q*\/ \/*start:2dofxi*\/.css-2dofxi{display:-webkit-box;display:-webkit-flex;display:-ms-flexbox;display:flex;-webkit-flex-direction:column;-ms-flex-direction:column;flex-direction:column;-webkit-align-items:stretch;-webkit-box-align:stretch;-ms-flex-align:stretch;align-items:stretch;line-height:normal;width:calc(41.667% - 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As the counterpart to the A18S Custom IEMs, the U18S combines proprietary drivers, LID technology, and a new electronic crossover network to deliver a uniquely exceptional listening experience. Handcrafted in the USA from aerospace-grade aluminum billet, CNC milled, sound blasted, fly cut, and twice anodized, the U18s is the daily driver you're missing in your busy life; the one up for the challenge. \u003c\/p\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cstyle data-emotion-css=\"1oskows\"\u003e\u003c\/style\u003e\n\u003cdiv class=\"builder-block builder-20eba2e7928940bfbf9ed5c2a5ac9edb builder-has-component css-1oskows\" builder-id=\"builder-20eba2e7928940bfbf9ed5c2a5ac9edb\"\u003e\u003cspan class=\"builder-text css-1qggkls\"\u003e\u003ch3\u003eSound Quality Reimagined\u003c\/h3\u003e\n\u003cp\u003eDive into your favorite tracks and rediscover them with a resolving lens where every note is reproduced authentically and accurately with precision. With 18 balanced armature drivers working in harmony, the U18s delivers direct, vibrant sound quality, revealing details that have gone unnoticed. The space between you and the performance is removed; the difference between hearing the best reproduction and experiencing it being played in real time. With an enveloping soundstage and a wide frequency response, the U18s IEMs place inside the music without fear of harshness or fatigue. \u003c\/p\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cstyle data-emotion-css=\"117k06z\"\u003e\u003c\/style\u003e\n\u003cdiv class=\"builder-block builder-54bd9905a67c4b6b9f08b755e145ad6d builder-has-component css-117k06z\" builder-id=\"builder-54bd9905a67c4b6b9f08b755e145ad6d\"\u003e\u003cspan class=\"builder-text css-1qggkls\"\u003e\u003ch3\u003e64 Audio's Key Proprietary Technologies\u003c\/h3\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cstyle data-emotion-css=\"1n2binq\"\u003e\u003c\/style\u003e\n\u003cdiv class=\"builder-block builder-3e91a4c99f5740809b2f0cd1663c0778 builder-has-component css-1n2binq\" builder-id=\"builder-3e91a4c99f5740809b2f0cd1663c0778\"\u003e\n\u003cstyle data-emotion-css=\"1840m1q\"\u003e\u003c\/style\u003e\n\u003cdiv class=\"builder-columns css-1840m1q\"\u003e\n\u003cstyle 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builder-id=\"builder-343f923df6d94427bd4a309ecf4d99b7\"\u003e\u003cspan class=\"builder-text css-1qggkls\"\u003e\u003cp\u003eDesigned and built by 64 Audio, the U18s leverages several of the company's proprietary technologies, including their \u003cstrong\u003etia (Tubeless In-Ear Audio) \u003c\/strong\u003esystem, \u003cstrong\u003eApex (Air Pressure Exchange) \u003c\/strong\u003esystem, and \u003cstrong\u003eLID (Linear Impedance Design) \u003c\/strong\u003ecircuit. \u003c\/p\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/div\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cstyle data-emotion-css=\"p2qb1g\"\u003e\u003c\/style\u003e\n\u003cdiv class=\"builder-block builder-24f680535ebd4851bcb788d7a44c10c1 builder-has-component css-p2qb1g\" builder-id=\"builder-24f680535ebd4851bcb788d7a44c10c1\"\u003e\u003cspan class=\"builder-text css-1qggkls\"\u003e\u003cp\u003e\u003cstrong\u003eTia–Tubeless In-Ear Audio\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eTubeless In-Ear Audio (tia) reduces unwanted resonance and distortion for a transparent, lifelike sound signature. The Tia system is comprised of three elements: open-balanced armature tia drivers, the tia single-bore design, and tia acoustic chambers. The U18s features two major elements of the tia system: the tia driver and the tia single-bore design. \u003c\/p\u003e\n\u003cp\u003eThe tia driver is positioned at the mouth of the sound bore, allowing it to radiate directly into the ear canal. This open architecture allows the sound from all drivers to mix more naturally before reaching the ear, creating a more extended and natural high-frequency response. The Tia system is regarded for its ability to produce a more open, natural, and detailed sound compared to traditional tubed IEMs.\u003c\/p\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cstyle data-emotion-css=\"nkbqxf\"\u003e\u003c\/style\u003e\n\u003cdiv class=\"builder-block builder-b6acd488a0c04153974447418f636bf5 builder-has-component css-nkbqxf\" builder-id=\"builder-b6acd488a0c04153974447418f636bf5\"\u003e\u003cspan class=\"builder-text css-1qggkls\"\u003e\u003cp\u003e\u003cstrong\u003eApex–Air Pressure Exchange\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eApex is 64 Audio's patented vent system that releases air pressure in a sealed ear canal, all while retaining standard IEM levels of isolation. This not only provides relief during long listening sessions, but also delivers a more realistic soundstage. Apex comes in three module variations for the U18s: mX, m15, and m20.\u003c\/p\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cstyle data-emotion-css=\"112w8wc\"\u003e\u003c\/style\u003e\n\u003cdiv class=\"builder-block builder-c5d4cb4ac93f4decbc77fafd91dc95c6 builder-has-component css-112w8wc\" builder-id=\"builder-c5d4cb4ac93f4decbc77fafd91dc95c6\"\u003e\u003cspan class=\"builder-text css-1qggkls\"\u003e\u003cp\u003e\u003cstrong\u003eLID–Linear Impedance Design\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eLID is a patented circuit that corrects the non-linear electrical resistance of the multiple driver-sets compromising the U18s. Varying source amplifier output impedance in devices like smartphones, body packs, DAC\/amps, and DAPs typically results in varying frequency response across them, depending on the increase in resistance. Restoring proper interaction with the source and preserving the desired sound signature enables a consistent, reliable sound.\u003c\/p\u003e\n\u003cp\u003eTo round out the U18s' impressive set of technologies is the \u003cstrong\u003eelectrical low-pass filter\u003c\/strong\u003e, a crossover circuit that replaces traditional acoustic dampers, which can introduce unwanted distortion through vibration and air turbulence. 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