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We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
If you want an over-ear USB headset for PC and PlayStation with virtual 7.1 surround, a boom mic and RGB lighting, choose FOXXRAY HAU-37; if you need pocket-sized in-ear buds with 4D surround, a detachable mic and 3.5mm/USB-C flexibility for phone and console, choose XOX KG01.
• FOXXRAY HAU-37 — biggest strength: full-size over-ear comfort with 50mm dynamic drivers, virtual 7.1 surround, a bendable boom mic and an in-line controller that handles volume, mic mute, four sound fields and four lighting modes.
• FOXXRAY HAU-37 — biggest trade-off: it is USB-only, so it will not work with Xbox over USB, and it locks you to wired desk-and-console setups rather than pocket carry.
• XOX KG01 — biggest strength: true portability with 11mm dynamic drivers, 4D surround, a DAC decoding chip and a detachable omnidirectional mic that turns the buds into plain music earphones when you are done gaming.
• XOX KG01 — biggest trade-off: in-ear buds trade the big over-ear soundstage and long-session cushioning for a lightweight fit, and the KG01 is a 3.5mm model in this configuration.
• Who each pick is for: FOXXRAY HAU-37 for the PC or PS5 player who lives at a desk; XOX KG01 for the mobile and cross-device gamer who wants one small kit for everything.
The HAU-37 is built around a 50mm dynamic driver, and that size matters. Bigger drivers move more air, which is exactly what virtual 7.1 surround processing needs to create a believable sense of space around your head. In practice, that means the kind of directional cueing that helps in shooters — footsteps that read as left-behind rather than just "somewhere" — plus enough low-end for movies and music when you are not gaming. The tuning is described as clear highs, balanced mids and deep lows, and the 20 Hz–20,000 Hz range is the standard full-band sweep you want for mixed use.
Comfort is the other half of the story here. The over-ear design uses large, soft, extra-thick cushions with a roomy inner cavity, breathable material and an adjustable headband with tension you can tune. That combination is aimed squarely at long sessions — a full evening of ranked play, or a workday of back-to-back calls. The 6.9ft braided cable gives you real slack to move, and the gold-plated USB plug means plug-and-play with no driver install required.
Buy it if you game or take calls at a desk, want one cable to your PC or PlayStation, and value over-ear comfort and a boom mic over portability. Skip it if you need Xbox support, want something that fits in a pocket, or rely on a phone as your main device.
XOX KG01: Who It's For
The KG01 goes the opposite direction: it is a professional gaming earbud that happens to be genuinely versatile. The 11mm dynamic driver is large for an in-ear, and paired with a DAC decoding chip and 4D surround sound, the stated goal is sound localization — pinpointing enemy positions rather than just hearing loud audio. The 16 ohm impedance and 105 dB sensitivity mean these are easy to drive from a phone, a controller or a handheld, which is a real advantage for mobile play.
The detachable microphone is the smartest design choice here. It is a flexible, bendable, omnidirectional pickup that captures your voice clearly while suppressing noise from the back and sides. When you are done with voice chat, you unplug it and the KG01 becomes a normal set of earbuds for music and calls — no dangling boom arm. That single feature is what makes these a genuine two-in-one.
Fit and durability are handled with an over-ear hook design and a 4ft braided cable that resists tangling. The hooks keep the buds locked in during long sessions, and the braided jacket is there to cut electromagnetic interference, add tensile strength and hold up over time. The 2-ounce weight makes them easy to forget you are wearing. On compatibility, the KG01 in this 3.5mm configuration connects over a 3.5mm jack — PlayStation, Xbox Series X/S and Xbox One over 3.5mm, plus phones and USB-C devices where the connection applies. It is a wired-only design.
Buy it if you play across phone, handheld and console, want a mic you can remove, and prefer a lightweight secure fit over a bulky headset. Skip it if you want maximum over-ear immersion, RGB flair, or an in-line sound-field switcher.
Side-by-Side: Which Should You Choose?
• Best for surround on the move → XOX KG01. 4D surround with a DAC chip in a 2-ounce in-ear package is far easier to carry.
• Best for long desk sessions → FOXXRAY HAU-37. Over-ear cushions, adjustable headband tension and a 6.9ft cable beat in-ears for all-day wear.
• Best for cross-device flexibility → XOX KG01. 3.5mm plus the detachable mic covers phone, console and PC audio in one small kit.
• Best for voice chat clarity → XOX KG01. The omnidirectional detachable mic with side/back noise suppression is purpose-built for comms, and you can remove it when not needed.
• Best for mic convenience at a desk → FOXXRAY HAU-37. A bendable boom mic with one-button mute on the in-line controller is simpler than detaching and reattaching.
• Best for aesthetic control → FOXXRAY HAU-37. Four lighting effects and an LED off button let you match your setup — or turn the glow off completely.
• Best for Xbox owners → XOX KG01. The HAU-37 does not support Xbox over USB; the KG01 connects over 3.5mm.
If I had to pick one, I would buy the FOXXRAY HAU-37 for a desk or PlayStation setup. In my opinion, the 50mm drivers, virtual 7.1 surround, four sound fields and over-ear comfort give you more headroom for immersive gaming and long sessions, and the in-line controller is genuinely convenient. I would only steer you to the XOX KG01 if portability, Xbox compatibility or a removable mic matter more to you than soundstage and cushioning — in that case the KG01 is the smarter buy. Both are wired, so decide based on where you play, not on features you will not use.
how to test surround sound headphones
Play a game or clip with clearly directional audio — footsteps circling you, a vehicle passing left to right — and listen for whether sounds move around you rather than staying flat in front. On the HAU-37, cycle the four sound fields on the in-line controller to hear how each changes the sense of space. On the KG01, test the 4D surround with the same clip and check whether you can place each sound's direction.
how to get surround sound headphones
You do not need special hardware — both of these deliver their surround effect digitally. The FOXXRAY HAU-37 provides virtual 7.1 through its USB connection and 50mm drivers, with four selectable sound fields. The XOX KG01 delivers 4D surround via its 11mm drivers and DAC decoding chip over its wired connection. Just plug in and enable the mode.
how to make surround sound headphones
"Making" surround means getting the processing and the drivers working together. On the HAU-37 you plug in over USB, pick a sound field on the controller, and optionally install FOXXRAY's Windows-only driver for extra EQ. On the KG01 you connect over 3.5mm and let the DAC chip handle the processing — no setup required.
how to fix surround sound headphones
Start with the connection: the HAU-37 needs USB (it will not work with Xbox over USB), and the KG01 needs a proper 3.5mm jack. Check that the mic is not muted and that volume is up on the in-line controller. If surround sounds flat, switch sound fields on the HAU-37, or reseat the 3.5mm plug on the KG01.
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