If you want a semi-open, spacious presentation with a 4.4mm wired connection, choose TANGZU HE Xiaoqiao HiFi; if you need bass-forward tuning and the flexibility of 3.5mm and 4.4mm plugs, choose CVJ Mermaid 2. For motorcycle-related listening, neither is a Bluetooth headset: both are wired in-ear monitors, so check your riding setup and local rules before considering either.
TANGZU HE Xiaoqiao HiFi vs CVJ Mermaid 2 at a Glance
• TANGZU HE Xiaoqiao HiFi’s biggest strength: a semi-open design intended to create a broader, more spacious presentation, with a 10mm graphene diaphragm dynamic driver. Trade-off: it is wired with a 4.4mm plug, so your device needs a compatible connection or suitable adapter.
• CVJ Mermaid 2’s biggest strength: bass-centric tuning and a detachable cable supplied with both 3.5mm and 4.4mm plugs. Trade-off: its stronger bass emphasis may not suit listeners who prefer a more restrained low end.
• TANGZU has an aluminum-alloy faceplate and resin shell; CVJ uses an aluminum-alloy cavity with a hollowed-out faceplate. Both are wired in-ear monitors with passive noise control.
• TANGZU is for listeners prioritizing an expansive soundstage and a 4.4mm source; CVJ is for listeners who want pronounced bass and broader plug compatibility.
• Neither product is Bluetooth. If you are searching for bluetooth earbuds for motorcycle use, these wired models do not match that requirement.
The TANGZU HE Xiaoqiao HiFi is built around a 10mm dynamic driver with a graphene diaphragm and a semi-open design. The intended character is spacious, with lifelike imaging and a presentation described as having tight bass and clear mids. That combination makes it worth considering if you want music or game audio to feel less confined than it can with a closed-in earphone design. Its 20-ohm impedance and stated 111 dB sensitivity are useful figures to note when checking whether your audio source is suitable.
How We Research
We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-10-20 · 7 min read · Independent comparison
I’d consider TANGZU for focused listening, gaming, or desk use when the source has a suitable 4.4mm output and a spacious presentation is the priority. Its semi-open design is not a promise of strong isolation, so think carefully about where you will use it. It is also not a Bluetooth option or a purpose-built motorcycle communication headset.
Who should skip it: Skip TANGZU if you need a wireless connection, a 3.5mm plug without an adapter, or isolation as your main priority.
The CVJ Mermaid 2 uses a 10mm dynamic driver with a beryllium crystal diaphragm and is tuned with extra attention to bass. Its stated design aims for substantial low-frequency weight while keeping the mids natural and the highs clear. That makes it the more obvious fit for someone who wants kick drums, bass lines, and other low-end parts to have presence without giving up all midrange and treble definition. The 22-ohm impedance and stated 108 dB sensitivity are the figures to consider when matching it with a source.
Its cable setup is a major practical advantage: the supplied detachable silver-plated cable has both 3.5mm and 4.4mm plugs. That gives it more connection flexibility across compatible devices, including PCs and other equipment with one of those outputs. The earphones have an aluminum-alloy cavity, a loop-over-ear fit, and silicone tips in small, medium, and large. The over-ear cable routing is intended to help keep them secure, while the tip choices let you select among three included sizes.
CVJ makes more sense for someone who moves between compatible audio sources or wants to choose between a common 3.5mm connection and 4.4mm. Its bass-focused tuning is a meaningful preference, not a universal advantage; listeners who want lighter bass may find the emphasis less appealing. Like TANGZU, it remains a wired in-ear monitor, not a Bluetooth device.
Who should skip it: Skip CVJ if pronounced bass is not your preference, or if you specifically want wireless audio or a motorcycle communications system.
Side-by-Side: Which Should You Choose?
• Best for bass-forward listening → CVJ Mermaid 2. Its tuning emphasizes impactful low frequencies while aiming to retain clear mids and highs.
• Best for switching between 3.5mm and 4.4mm connections → CVJ Mermaid 2. Both plug options are included with its detachable cable.
• Best if your setup already uses a 4.4mm output and you want a 10mm graphene diaphragm → TANGZU HE Xiaoqiao HiFi. Confirm the connector before choosing it.
• Best for a loop-over-ear cable fit → CVJ Mermaid 2. Its ergonomic design routes the cable over the ear.
• Best for a semi-open design and resin shell → TANGZU HE Xiaoqiao HiFi. Its faceplate is aluminum alloy, but the shell material is resin.
• Best for a detachable cable with three included tip sizes → CVJ Mermaid 2. Small, medium, and large silicone tips are listed.
• Best for a motorcycle Bluetooth headset → Neither. These are wired IEMs, not Bluetooth earbuds or a Bluetooth headset for motorcycle use.
I would choose the CVJ Mermaid 2 for general wired use because its included 3.5mm and 4.4mm plugs make it easier to match with different compatible sources, and its bass-forward tuning has a clear purpose. I’d choose TANGZU instead if I specifically wanted a semi-open presentation and already had a 4.4mm output. For motorcycle use, I would not treat either as a Bluetooth headset or assume either is suitable for riding; the connection type and listening environment matter.
Before choosing, check the output on the device you actually plan to use. TANGZU lists a 4.4mm connection, while CVJ supplies both 3.5mm and 4.4mm options. That distinction may settle the choice before sound preference enters the picture. Both models are wired, so neither provides Bluetooth connectivity.
Think about tuning as well as connectivity. TANGZU’s semi-open construction is intended to produce a roomy presentation, while CVJ’s stated focus is a fuller bass response. If you mostly listen to bass-heavy music, CVJ’s emphasis may appeal; if you value spatial presentation and imaging, TANGZU’s stated design may be more relevant. These are different priorities rather than a simple quality ladder.
FAQ
No. Both are wired in-ear monitors. TANGZU lists a 4.4mm jack; CVJ includes cable options for 3.5mm and 4.4mm connections.
CVJ Mermaid 2 is explicitly described as bass-centric, with an emphasis on powerful low frequencies. TANGZU is described as having controlled, tight bass alongside a spacious semi-open presentation.
Neither is a Bluetooth headset or a purpose-built motorcycle communication device. Both are wired IEMs, so they do not meet a request specifically for bluetooth earbuds for motorcycle use.
CVJ includes a 3.5mm plug as well as a 4.4mm option. TANGZU is listed with a 4.4mm connection, so check your device’s output and any adapter requirements before buying.
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