Sleek HiBy W4 HiFi amplifier on a minimalist desk with headphones and laptop.

HiBy W4: A Vibrant $99 HiFi Amplifier Transforming Wired Audio Experience

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Written by Flynn Matthews

2026-09-29

Revolutionizing Portable Audio with Style and Substance

The HiBy W4 HiFi Amplifier boldly reimagines the headphone adapter with its colorful, geometric design and a tactile volume dial. Unlike traditional adapters that blend into the background, this one insists on being noticed, combining retro charm with modern functionality.

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Compact, black HiBy W4 amplifier connected to wired earphones outside.

Tactile Controls and Visual Feedback

Designed for the tactile enthusiast, the HiBy W4 features a touch-friendly 2-inch screen for playback information and settings. Its prominent volume dial offers effortless control even when stowed away, ensuring you can adjust audio without the hassle of retrieving your device.

Close-up of HiBy W4 amplifier showing volume knob and input ports.
HiBy W4 amplifier on a wooden table with scattered music notes paper.

MagSafe Compatibility and Connectivity Options

While retaining the necessity of wired connections, the amplifier supports MagSafe for convenient attachment to compatible devices—though the magnetic backplate is an optional purchase. With Bluetooth 5.4, it manages the wireless link between your phone and the amplifier, offering LDAC and aptX support alongside dual CS43198 DAC chips for superior sound conversion.

HiBy W4 amplifier next to a vintage vinyl player on a shelf.
Stereo system setup with HiBy W4 amplifier and bookshelf speakers.

Versatile Outputs of the HiBy W4

Supporting both 3.5mm and 4.4mm balanced outputs, the W4 caters to various headphone types. Connected via USB-C, it also doubles as a desktop DAC, with an “UnCharge” mode to prevent battery drain on connected devices. This audio device easily integrates with a broad range of systems, ensuring top-notch sound fidelity across the board.

Person holding HiBy W4 amplifier while adjusting audio settings on a smartphone.
Modern home studio desk with HiBy W4 amplifier and large monitor screen.

Battery Life and Practicality Concerns

Though its battery requires frequent attention, offering up to 6.3 hours of AAC playback, it diminishes to 5 hours using the 4.4mm output. This makes it crucial to remember charging before outings.

Back view of HiBy W4 amplifier displaying various connectivity ports.

The HiBy W4, priced at $99, may not eliminate cables completely, but it brings cherished headphones into a new era of audio fidelity. Its vibrant aesthetics add a splash of personality, appealing to audiophiles who value both style and sound.

If you appreciate vibrant designs and high functionality, explore the Focal Bathys MG for its high-fidelity sound and stylish design.

HiBy W4 amplifier sitting under a desk lamp next to a plant.
HiBy W4 amplifier placed on a music-themed shelf with books and records.

Source: yankodesign.com

Frequently asked questions

What design features does the HiBy W4 have?

The HiBy W4 HiFi Amplifier has a colorful, geometric design with a tactile volume dial. It also features a touch-friendly 2-inch screen for playback information and settings.

Does the HiBy W4 support wireless connections?

Yes, the HiBy W4 supports Bluetooth 5.4 with LDAC and aptX, managing the wireless link between your phone and the amplifier.

What outputs does the HiBy W4 support?

The HiBy W4 supports both 3.5mm and 4.4mm balanced outputs, catering to various headphone types.