The NF Audio RA15 is an IEM (In-Ear Monitor) that stands out with its new generation dual cavity dynamic driver technology. At first glance, it catches the eye with its compact size and lightweight design, but it also stands out with its wide frequency range and impressive performance for the discerning listener. Particularly with the performance and sound character it offers for its price, it is an appealing option for both everyday users and audiophiles. And a fresh air after the already innovative RG15.
NF Audio’s Contribution to the IEM Field
NF Audio has consistently contributed to the world of in-ear monitors by pushing the boundaries of what’s possible in sound engineering, especially in the budget and 99 bucks and mid-tier segments. Their innovative use of driver technology and meticulous tuning has provided listeners with high-quality, natural sound at accessible price points. The RA15 is yet another example of NF Audio’s dedication to delivering exceptional audio experiences, making them a respected name among audiophiles and casual listeners alike. Their approach not only elevates the standard of sound quality but also emphasizes a commitment to evolving the audio experience for everyone.
Disclaimer: Thanks to NF Audio and AG for providing this unit for review.
Unboxing the NF Audio RA15
As soon as I opened the box, I was greeted by NF Audio’s typical minimalist approach. Inside the box, besides the RA15 IEMs, there are ear tips of various sizes embedded on a plate and a 0.78mm 2pin 5N OFC cable.
The included cable is thin but durable, and its detachable nature allows for customization with different cables. The box contents are simple yet functional, promising a straightforward user experience.
Bass
The bass performance of the RA15 is quite balanced and controlled. Especially in electronic music and rock genres, the bass is deep but not overwhelming. In Gotan Project’s “Paris, Texas,” it delivers the lower frequencies of acoustic instruments with an organic naturalness, conveying the warmth of wooden-bodied instruments. However, it might be slightly insufficient for those looking for a very strong bass punch in genres like dubstep. This bass performance will likely appeal more to users who seek clarity and accuracy. Without being overly technical, it delivers enjoyable bass, particularly with the DX170. The slam is adequate depending on the source DAP.
Midrange
In the frequency graph, there doesn’t seem to be a special emphasis on mids, but there is no deep V-shape or recessed midrange either. Vocals remain distinguishable whether in electronic or organic tracks. In hardcore music, especially during the attack phase before the chorus, the full midrange control is impressive. The tonality is beautiful and reflects the essence of the recording well. In the “Sing the Sorrow” album, the song “Silver and Cold” makes it possible to feel all the weariness. Then, flowing with coherence in Röyksopp’s tracks, it’s a pleasant relaxation with eyes closed. Swapping the stock white tips with EPZ M100 tips, experiencing the most energetic moments in NOS mode is satisfying. With those white ear tips, playback becomes more intimate, details more generous, and transparency significantly improves. Example’s “Changed The Way You Kiss Me” could even take you out of yourself when the volume is turned up, especially with its dynamism. Similarly, Arcade Fire is also quite successful. Vocals come through as they should, as do various instruments and strings.
Treble
The treble is mildly soft, never becoming harsh. They know their place, especially in live concert settings, just like everyone else. Due to the increased resolution factor with more power, the overall and treble enjoyment rises with added power. In live rock music, the cymbals don’t hit in a “crash-crash” format—short, flat, and random. In fact, it’s possible to pick out the Greek bouzouki solo that cuts through while all the other instruments play in the background in Driving. The Tokyo Kosei Wind Orchestra, which liberally gives treble, doesn’t hurt the ear when paired with the RA15.
NF Audio RA15 After Cayin N8ii
Everything gained a captivating smoothness, great transparency, dynamism, 3D imaging, stage projection, and tactile feedback on the bass. Even in power metal, instrument separation improved. When combined with transparency, this genre, which can be tiring, became truly fun. Besides, NF Audio RA15 deserves praise for its success in reflecting the cleanliness in playback.
Granted, you likely wouldn’t pair a sub-$100 IEM with a DAP that costs around $3,500, but I must add that the Cayin N8ii pushed the RA15 to its limits and put it on steroids 🙂 As a result, this well-balanced RA15 made my ears tremble at 40/100 volume in drum’n bass! There was no muddiness or blurriness, but all the melodic structure was in my ears, as well as the unique organic-electronic mix that makes Infected Mushroom stand out.
Pros and Cons
Pros:
– Balanced and natural sound signature
– Detailed midrange and vocal performance
– Durable and detachable cable
– Minimalist and sleek design
Cons:
– Might not be sufficient for those expecting very strong bass punches
– Some users may notice slight harshness in higher frequencies
NF Audio RA15 Review Conclusion
The NF Audio RA15, with its balanced sound character and natural tonality for its price, is a great choice for both beginners and experienced users. Its dual cavity dynamic driver design and quality materials provide a performance that doesn’t tire, even during long listening sessions. The RA15 is a solid candidate for anyone seeking a good music experience.
