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We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-09-21 · 7 min read · Independent comparison
• BASN Metalen 4 — biggest strength: Four hybrid drivers per earbud (2 balanced armature + 2 dynamic) tuned for heavy, quick, accurate bass, plus two detachable 4.9 ft MMCX cables and a full accessory kit.
• BASN Metalen 4 — biggest trade-off: It is a wired, passive in-ear monitor. There is no battery, no Bluetooth and no amplification — it only works plugged into a 3.5 mm source.
• Yamnweo DJ-M4 — biggest strength: A true 4-channel mixer with independent gain and 3-band EQ per channel, a crossfader, cue monitoring and both Bluetooth and USB playback.
• Yamnweo DJ-M4 — biggest trade-off: It is a stationary, corded piece of gear that needs mains power and a spot on your desk or rack — nothing about it is portable or wearable.
• For the musician on stage → BASN Metalen 4. For the DJ or host running the room → Yamnweo DJ-M4.
The BASN Metalen 4 is a wired in-ear monitor, and everything about it is aimed at people who play rather than people who mix. Each earbud carries four drivers — two balanced armatures and two dynamic — and BASN tunes that combination for what the spec sheet calls heavy, impressive driven bass with a fast attack and decay, plus full, warm mids. The published range of 16 Hz to 25 kHz and 108 dB sensitivity at 32 ohms tells you it is meant to be driven by a normal phone, interface or monitor pack rather than a dedicated headphone amp. For a bassist or drummer who needs to feel the low end and still hear detail, that is a sensible design brief.
What makes it practical on a gig is the rest of the kit. You get two 4.9 ft cables: a silver-plated OFC cable without a mic, which BASN describes as brighter and more articulate, and a fiber cable with an inline mic and media/call/volume controls for when you are not on stage. The MMCX connector rotates and is replaceable, so you can swap or upgrade cables later. The shells are milled from metal with a gray matte CNC finish, and with memory foam and S/M/L tips plus a 1/4" adaptor, T-shirt clip, cleaning brush and carrying case in the box, there is nothing else to buy on day one. Sound isolation is passive, and the 230 g figure is the whole packaged item rather than the buds themselves.
Who should buy it: singers, drummers, bassists, guitarists and anyone doing gigs, band rehearsals or HiFi listening who wants a wired IEM with bass-forward tuning and cable flexibility. Who should skip it: anyone who wants wireless freedom, active noise cancellation, or a single cable they never think about. If you want a mic on the cable you keep on stage, you will need to use the fiber cable rather than the silver-plated one. And if your listening is mostly podcasts on a commute, the bass emphasis and the metal shells are more monitor than you need.
The Yamnweo DJ-M4 is a different animal entirely — a 4-channel DJ mixer in a rugged metal housing, measuring about 11.22" deep by 9.45" wide by 2.95" high and weighing 6.1 pounds. It is corded, running on 110 volts, so it lives on a table, in a booth or in a rack. The "embeddable, fixed" description in the product name tells you it is designed to be installed and stay put, not carried around in a bag.
The feature set is aimed squarely at mixing. Four channels give you room for turntables, CDJs, a phone and a mic all at once. Each channel has its own gain regulator and a 3-band EQ covering treble, mid and bass, which is exactly what you want for trimming frequencies and blending tracks without mud. Channel faders and a crossfader handle transitions, and the crossfader mode lets you choose between soft blends and hard cuts — useful whether you are playing house, techno or hip-hop. Bluetooth lets you stream from a phone or tablet, and the USB port plays MP3 files directly for quick transitions or background music before the room fills up.
The cue system is the part working DJs will care about most. Cue Mix lets you audition the next track in headphones before it hits the speakers, and with headphone level control and monitor channel selection you can keep track of what is coming in a loud room. Two 6.35 mm microphone inputs with their own level control cover MCs and karaoke announcements, and the bright indicator LEDs help in dim venues. Outputs are 6.35 mm jack and RCA.
Who should buy it: mobile DJs, bar and stage operators, party hosts and home-studio users who need real channel count, EQ and cueing. Who should skip it: anyone who wants to listen on the move, or anyone whose setup is a single laptop and a pair of speakers — four channels and a crossfader would be overkill. Note the warranty terms are a 30-day return and exchange policy, which is noticeably shorter than the BASN's 12 months.
• Best for bass-forward monitoring on stage → BASN Metalen 4. Two dynamic drivers plus two balanced armatures, tuned for fast, heavy low end.
• Best for running a party or venue → Yamnweo DJ-M4. Four channels, per-channel gain, 3-band EQ and a crossfader cover a full night of mixing.
• Best for cable flexibility → BASN Metalen 4. Two 4.9 ft MMCX cables, one silver-plated and one with an inline mic, both replaceable.
• Best for wireless convenience → Yamnweo DJ-M4. Bluetooth streaming and USB MP3 playback are built in; the BASN is wired only.
• Best for cueing the next track → Yamnweo DJ-M4. The Cue Mix monitor function with headphone level and channel selection is the whole point of a DJ mixer.
• Best for a self-contained kit → BASN Metalen 4. Earbuds, two cables, memory foams, three tip sizes, clip, brush, 1/4" adaptor and case are all included.
• Best for vocal and MC work → Yamnweo DJ-M4. Two 6.35 mm mic inputs with independent control; the BASN only offers a mic on its fiber cable.
• Best for portability → BASN Metalen 4. The mixer is a 6.1-pound mains-powered unit that stays on the desk.
In my opinion, these two barely compete for the same buyer, so the answer depends on which side of the booth you stand on. If you play an instrument and want the low end to hit — and you want two cables and a complete kit in one box — I would buy the BASN Metalen 4. If you are the one running the night, cueing tracks and streaming from a phone, I would buy the Yamnweo DJ-M4; a set of IEMs simply cannot do that job. Buy the BASN for your ears, the Yamnweo for your desk. For either one, check the current price on Amazon before you commit, since the value math changes with whatever the listing shows today.
No. It is a wired in-ear monitor with a 3.5 mm jack and two detachable 4.9 ft MMCX cables. There is no battery and no Bluetooth.
Yes. It has built-in Bluetooth for streaming from a smartphone or tablet, plus a USB port for direct MP3 playback.
Not necessarily. At 32 ohms and 108 dB sensitivity it is designed to run from normal sources, though the 16 Hz–25 kHz range means a cleaner source will get more out of it.
If your home use is playing an instrument or listening to music, the BASN Metalen 4 fits better. If it is mixing, streaming and hosting, the Yamnweo DJ-M4 is the one — just plan space for a 6.1-pound, mains-powered unit.
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