Hybrid Universal In-ears with Dynamic LF Driver
The universal-fit counterpart to 64 Audio's custom-fit A4s, U4s is a 4-driver, hybrid in-ear monitor with a powerful Dynamic low-frequency driver. You'll enjoy resonance- and distortion-free listening, thanks to U4s's Tia system, while Apex tech supplies effortless audio reproduction and minimal wearing fatigue. LID technology ensures consistent sound regardless of what playback device you plug your earphones into. Moreover, you get a state-of-the-art lowpass filter that removes problem frequencies for even lower distortion. U4s offers a rich, enveloping listening experience that any musician will appreciate, along with a frequency response, detail, and soundstage that will please even the most discerning audiophiles. 64 Audio's U4s boasts an eye-grabbing look, with a Slate Blue shell color influenced by blue-dial timepieces, plus a unique faceplate pattern inspired by Muonionalusta meteorite fragments.
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Distortion-free sound and long-wearing comfort
U4s delivers a first-class listening experience. Its Tia System minimizes unwanted resonances and distortion, delivering a transparent, lifelike sound. Its open-balanced armature Tia Drivers radiate freely into a single large Tia bore, resulting in zero obstructions to the front of the drivers. We're impressed by this design here at Sweetwater. It offers a significant step up compared to lesser designs that constrict the sound of their drivers by cramming them into a tube. Moreover, U4s's Apex tech employs a patented vent that releases air pressure in a sealed ear canal while maintaining isolation. This ensures less obstructed airflow, giving you ultra-clean audio and long-wearing comfort.
Consistent performance with any playback device
Armed with LID technology, 64 Audio's U4s accounts for the nonlinear impedances of the multiple driver sets comprising its 4-driver design. This factor ensures proper interaction regardless of what you plug into. Your source material will sound the same whether you're listening via smartphone, bodypack, or headphone amplifier.
State-of-the-art lowpass filter
U4s includes an electrical lowpass filter that lowers distortion by removing problem frequencies. This circuit actually eliminates target frequencies before they reach the IEM's driver. This filter isn't an old-school acoustic damper. Acoustic dampers are outmoded tech that don't actually prevent frequencies from hitting the driver; they merely keep them from reaching your ear. Acoustic dampers introduce unwanted vibration, air movement, and distortion at high volumes. Thanks to U4s's state-of-the-art lowpass filter, you won't encounter any of these issues.
64 Audio U4s Features:
- Top-shelf universal-fit in-ear monitors with powerful Dynamic low-frequency driver
- Tia system supplies resonance- and distortion-free listening
- Apex tech ensures effortless audio reproduction and minimal wearing fatigue
- LID technology ensures consistent sound regardless of playback device
- State-of-the-art lowpass filter removes problem frequencies to lower distortion
- Offers a frequency response, detail, and soundstage that will please even the most discerning of audiophiles
- Boasts an eye-grabbing look with a Slate Blue shell and a faceplate pattern inspired by Muonionalusta meteorite fragments
- Comes with TrueFidelity eartips (S,M,L), Silicone eartips (S,M,L), SpinFit eartips, an eartip holder, a silver-plated copper cable, m20 apex modules, m15 apex modules, mX apex modules, and a sticker
