In today’s review, I’m checking out the NF Acous NA20 in-ear monitors. The NA20 features a new and updated dynamic driver and optimised mechanical structure, encased in frosted Maillard-style shells. It’s priced at 129 USD.
Disclaimer: This sample was provided by NF Acous in exchange for an honest review. All observations and opinions here are my own, based on my experience with the product.
NF Acous NA20
Specifications
Driver: Dynamic Driver
Cable: 0.78mm dual pin 6N OFC
Sensitivity: 109 dB / mW
Impedance: 32Ω
Sound Insulation: 25dB
Frequency Response: 9-40kHz
Distortion: < 1%
Max SPL: 125dB
Connector: 3.5mm
Inside the Box
- NF Acous NA20 IEMs
- Detachable 0.78mm 2 pin 6N Cable
- Storage Box
- Ear Tips*8 (MS,S,M,L)
- 3.5-6.35mm adapter
Design
The NF Acous NA20 is built from tough, high-strength polycarbonate with a frosted finish that gives it a clean, understated look. CNC-machined aluminium accents add a touch of flair, while keeping the overall design fairly low-key.
There’s a pinhole vent in front of the hooded 2-pin sockets and another near the base of the nozzle. The nozzles have a protective metal grille to keep out earwax and a ridge at the tip to hold eartips securely in place.
I found the NA20 earpieces to be very comfortable. They’re relatively compact with a low profile, so they don’t stick out much while worn. However, I struggled to get a secure fit due to the aggressive curve of the stock cable, which forced me to either use extra-large eartips or switch to a third-party cable to achieve a proper seal.
The included 6N cable is built from high‑quality materials but tangles easily. Its aggressively curved ear hooks may also compromise fit depending on your ear anatomy. It features a rubberised Y‑split and an aluminium chin slider. The cable uses the KZ‑style QDC recessed 2‑pin connectors, which offer a secure fit—but in practice limit cable‑rolling options.
Sound
Sources used for testing include the Shanling UA2 Plus, iBasso DX180 and D&A Alpha Pro. You don’t need a powerful audio source to use the NA20—plug it into anything!
The NA20 goes for a classic V-shaped sound, and honestly, it does it pretty well. It’s got that energetic, fun vibe with lively dynamics and a bit of extra warmth that makes music feel more exciting. The mids take a bit of a back seat, which is typical for this kind of tuning, but it still holds together nicely overall.
The bass has a nice boost, especially in the mid-bass, so you get a satisfying punch with drums and basslines. There’s still enough sub-bass rumble when it’s called for, but it’s that upper-bass lift that really gives it groove. Kick drums land with good weight and a natural-feeling attack, and the quick decay keeps everything sounding clean. It’s the kind of bass that gets your head nodding and pulls you into the rhythm.
Mids are slightly recessed, so vocals and instruments like acoustic guitar or piano can sound a little distant at times—more noticeable on vocal-centric or stripped-back tracks. Male vocals especially could use a bit more body. That said, there’s barely any bass bleed, so the midrange still comes through clearly without being masked or muddy.
The treble adds just the right amount of sparkle to keep things crisp without going overboard. It brings out extra detail in things like cymbals and hi-hats and gives the soundstage a bit of extra air and separation. It helps give the impression of better resolution, even if it’s not ultra-detailed in the technical sense.
Verdict
The NA20 delivers where it counts: it looks great, feels incredibly comfortable in the ears, and has a lively, well-executed V-shaped sound that’s hard not to enjoy. The bass is fun, the treble sparkles, and the overall tuning strikes a nice balance between energy and clarity.
Unfortunately, the QDC connectors and that stiff, awkward cable really let it down. As good as the sound is, I often find myself reaching for other IEMs just to avoid the hassle. It’s a shame, because with a better cable system, the NA20 could’ve been a regular in my rotation.