How We Research
We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
If you want a wired reference monitor for laptop work that leans warm and bass-rich and is built to take stage abuse, choose NFACOUS NM20; if you need a hybrid reference monitor with a wider, more detailed presentation and a balanced 4.4mm-ready cable for a laptop desktop-audio chain, choose HiFiGo Juzear Ne Bula. Both are wired in-ear monitors aimed at people who want to hear their mixes and music honestly, but they get there in opposite ways.
• NFACOUS NM20 biggest strength: A single integrated electronic-tuning dynamic driver with a beryllium-plated diaphragm and a dual acoustic chamber, tuned for reference-class sound with extra bass below 100Hz.
• NFACOUS NM20 biggest trade-off: It is a single-driver design with only a 3.5mm jack and no balanced option, so it has less separation and less connection flexibility than a hybrid.
• HiFiGo Juzear Ne Bula biggest strength: A 1DD+3BA+1 planar hybrid with a 4-way crossover and four independent acoustic tubes, giving precise instrument separation and an expansive soundstage.
• HiFiGo Juzear Ne Bula biggest trade-off: Five drivers and a 4-way crossover are a lot of moving parts for someone who just wants one honest driver and a simple 3.5mm plug.
• Choose NFACOUS NM20 if you want a lightweight, comfortable reference monitor for long laptop sessions with warm low-end emphasis.
• Choose HiFiGo Juzear Ne Bula if you want maximum detail retrieval, spatial imaging, and both 3.5mm and 4.4mm cable options out of the box.
The NM20 is the simpler idea done carefully. NF ACOUS built it around one upgraded dynamic driver — the MC2L-100P — with an integrated tuning PCB, a beryllium-plated diaphragm, and a dual acoustic chamber that manages air pressure inside the shell. On top of that sits the brand's Clutter Trap Technology, which balances air pressure between the front and rear of the driver. The spec list tells you what that adds up to: 20Hz–40kHz frequency range, 32-ohm impedance, and 108dB sensitivity. That is an easy load for a laptop headphone jack, and the low-frequency tuning is explicitly pushed below 100Hz, so bass guitars, kick drums and low synth layers sit forward in the mix rather than hiding behind it.
Physically, the NM20 is the kind of IEM you can forget you're wearing. The shell is high-strength polycarbonate with a frosted finish and CNC-carved anodized aluminum accents, which keeps it light while still looking deliberate. The nozzle is shaped around the second bend of the ear, with a relief curve that reduces pressure on the crus helix and a small protrusion for concha support — that's ergonomics worked out over years of stage-custom experience, not a generic bullet shape. Passive isolation is rated at 25dB, and the cable is a 0.78mm 2-pin 5N OFC terminated in 3.5mm, with a gold-plated 6.35mm adapter in the box for plugging into an interface or amp.
So who should buy it? Musicians who monitor on stage or in a home setup, and laptop users who want one warm, forgiving wired IEM for editing audio, watching video, or long listening sessions. The package is generous for the category: four pairs of tips (XS, S, M, L), a storage box, the adapter, and a one-year manufacturer warranty. Who should skip it? If you want the last word in treble air, pinpoint layering, or a balanced 4.4mm connection, the single-driver, 3.5mm-only approach will feel like a ceiling rather than a feature.
The Ne Bula is the opposite philosophy: more drivers, more crossover, more information. It stacks a custom MACCD dynamic driver for controlled bass, three balanced armatures for the midrange, and a planar driver for airy treble and detail retrieval — five drivers per side, split by a 4-way crossover across four independent acoustic tubes. Juzear says it was tuned with KOTO through extensive listening evaluation toward a balanced reference curve. You don't have to take the tuning claim on faith to see what the architecture buys you: dedicated drivers per band plus independent tubes is exactly how you get clean instrument separation and a wider image, because each driver is only doing one job.
That shows up in practical terms. Complex mixes — layered J-pop, ACG, anime soundtracks, live recordings with a lot of reverb — stay legible instead of smearing into one another. The planar driver is the reason the top end sounds open rather than rolled off. And the 4-way crossover is what keeps vocals distinct from the instruments behind them, which matters just as much for competitive FPS gaming and movie dialogue as it does for music. The 6.1g-per-earpiece shell and passive noise isolation make it comfortable for extended sessions, and the iridescent multi-layer faceplate shifts color depending on the angle — a cosmetic detail, but a real one if these are going to live on your desk.
The cable is where the Ne Bula pulls ahead on flexibility. It ships with a 400-core 6N OCC silver-plated detachable cable that includes both 3.5mm single-ended and 4.4mm balanced plugs, so you can move between a laptop's headphone jack, a portable DAC, a DAP, or a desktop amp without buying anything extra. Impedance is 32 ohm, matching the NM20, so neither is hard to drive. You also get a protective case, eartips, and a one-year warranty.
Who should buy it? Anyone whose laptop is really a small audio workstation — people running a DAC or amp who want balanced output, and listeners who care about imaging and detail across many genres. Who should skip it? Buyers who want one driver, one simple plug, and a warmer low-end tilt; the Ne Bula is balanced first and bass-forward second, and five drivers is more system than a casual listener needs.
Side-by-Side: Which Should You Choose?
• Best for detail retrieval and soundstage width → HiFiGo Juzear Ne Bula (planar treble plus a 4-way crossover across four acoustic tubes).
• Best for long, light listening sessions → NFACOUS NM20 (polycarbonate shell, ergonomic nozzle shaped to the ear's second bend, 25dB isolation).
• Best for instrument separation on dense tracks → HiFiGo Juzear Ne Bula (dedicated DD, BA and planar drivers per band, 6.1g per earpiece).
• Best for connection flexibility → HiFiGo Juzear Ne Bula (detachable 400-core 6N OCC silver-plated cable with both 3.5mm and 4.4mm plugs).
• Best for plugging straight into a laptop jack with no extras → NFACOUS NM20 (fixed 3.5mm OFC cable, plus a 6.35mm gold-plated adapter for interfaces).
• Best for gaming and movie dialogue clarity → HiFiGo Juzear Ne Bula (spatial audio and precise imaging are core to the crossover design).
• Best for stage and studio monitoring on a budget-conscious setup → NFACOUS NM20 (built for professional monitoring, with a storage box, four tip sizes and a one-year warranty).
In my opinion, the HiFiGo Juzear Ne Bula is the better reference monitor for a laptop-based setup. The hybrid driver array and 4-way crossover give it detail, separation and soundstage that a single dynamic driver simply cannot match, and the included 3.5mm and 4.4mm cable means it grows with your chain instead of capping it. I would pick the NFACOUS NM20 instead if your priority is a warm, bass-forward tuning, a light comfortable shell for marathon sessions, and the simplest possible plug-and-play path out of a laptop headphone jack. If price is the deciding factor for you, check the current price on Amazon before you commit.
what is studio monitor headphones
Studio monitor headphones are headphones designed to reproduce audio as neutrally as possible so you hear the recording rather than a flattering version of it, which is what makes them useful for mixing and critical listening. Both IEMs here are built toward that goal: the NM20 through a reference-class single dynamic driver, the Ne Bula through a balanced reference tuning split across five drivers.
what are reference studio headphones
Reference studio headphones are the same idea — a reference is the neutral baseline a mix is judged against, so the headphones aim for even, uncolored response rather than boosted bass or treble. The NM20 adds a deliberate lift below 100Hz, while the Ne Bula targets a balanced curve with separate drivers handling bass, mids and treble.
The term is used interchangeably with studio monitor headphones: in-ear or over-ear gear meant for accurate monitoring in a studio or at a desk. The NFACOUS NM20 is explicitly positioned for professional monitoring and audiophile listening, and the Juzear Ne Bula is tuned for reference-quality detail with a 4-way crossover.
can you connect headphones to monitor
Yes — you connect wired IEMs to a monitor in the sense of a computer display or a monitor speaker setup by plugging into the 3.5mm output, and both of these use a 3.5mm jack. The Ne Bula also offers a 4.4mm balanced plug for desktop audio systems, and the NM20 includes a gold-plated 6.35mm adapter for interfaces and amps.
More Comparisons
• SteelSeries Arctis Nova 1P vs Fisher Active Noise Cancelling
• MUSICOZY Sleep Headphones vs Shqncoh Anime Aegis Aigis
• TOZO HT2 vs Berufexp Earbuds comparison
• APETOO USB C Headphones vs HAWSON A2179: Headphones for
As an Amazon Associate I earn from qualifying purchases.
We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon and affiliated sites.
When you buy through links on this page, we may earn a commission from qualifying purchases at no extra cost to you.
Amazon and the Amazon logo are trademarks of Amazon or its affiliates. This site is an independent third-party review and is not affiliated with, endorsed by, or sponsored by Amazon or the product brands mentioned.