PULA AUDIO ARC: Simplicity As its Core

It's been a while since I reviewed a product from PULA AUDIO, and now what I have here is their latest entry-level model and possibly their cheapest model. And this earphone has a single transducer set-up on its composite shell frame.

This is the ARC, their newest budget-friendly entry-level model and as I mentioned, it has a one driver configuration on each side of the channel. It features a reliable 10mm dual-chambered, dual-magnetic dynamic driver architecture with a PET (polyethylene terephthalate) material on its diaphragm which is known for its clear, lightweight yet sturdy that it will deliver a more responsive on its transient with less distortion for a precise and smooth sound quality for better deeper bass, a warmer and natural sounding midrange, and clear and smooth treble.

The driver was then housed in an ergonomically-shaped composite shell structure consisting of metal and plastic resin, as the former is a CNC-milled, brushed aluminium alloy on its faceplate panel for scratch-resistance and less fingerprint mark, and the latter part is a clear and transparent resin with a stabilising fin for better wearing grip on our concha. The overall design is minimalist and some simple patterns on it along with laser-etched brandi in a silver coloured faceplate that somehow pairs well with the transparent look on its lower part, and also, like all previous PULA AUDIO models, it still utilises a 0.78mm two-pin connector as its interlocking mechanism.

The stock cable of the ARC seems to have a silver-plated copper with a PU-sheathed insulator and also, a 3.5mm single-ended plug on its end, and PULA AUDIO also offers a USB Type-C variant with a built-in microphone. The cable texture is pretty lean but the material of its cable will ensure a seamless transmission of sound wave with a lesser loss of data signal for a better audio quality output that I don't encounter any microphonic effects, distortion or RF interferences.

When it comes to wearability, the shells of this earphone are pretty lightweight yet sturdy that with its ergonomically contoured on its design, it rests well into my lugholes without any discomfort or ear fatigue. Depending on the ear tips we are pairing with, it will provide a firm seal into my outer ear canal that it offers a good passive noise isolation that blocks unwanted external noises from the outside.

Given that I’ve reviewed some PULA AUDIO products in the past, this one is the most elementary in terms of product presentation and its included accessories are rather meagre. The packaging box is pretty minimalist, and its internal structure in which the contents were placed reminds us of a typical ultra-budget entry-level product packaging pattern.

These are following contents inside of its packaging box:

• Pair of PULA AUDIO ARC IEM transducer earpieces
• Stock cable with 3.5mm single-ended termination
• Three (3) balanced bore silicone eartips in a different standard sizes (S,M,L)
• User manual/warranty booklet

As for its driveability, with a 32 ohms of impedance and a sensitivity rating of 104dB, this set is fairly easy to drive that it will scale well even on a normal gain output. Even with a little amplification and a low to medium volume level, this one will deliver a full range and pretty dynamic sound.

The PULA AUDIO ARC acoustic profile has a mild U-shaped sound signature with a warm-ish balanced tonality on it. It has a gentle emphasis on low frequency, a slight dip on the midrange and a subtle boost on its high frequency as it will give a balanced and cohesive sound.

LOWS/BASS:

The bass quality of this one is pretty balanced and integrated on this particular frequency region that both the sub bass section and the mid bass have a good presence as it gives a deep, heft and rumbly. Overall, it has a punchy, rumbly and reverberating bass response albeit it is still not classified as basshead’s low end sound preference.

• The sub bass presence is clearly felt as it has deep rumble that it can produce those sound energies produced from instruments like low-tuned string instruments and electronic ones like drum machines and synthesisers.
• The mid bass texture on this one is full-bodied, rich and weighty that gives more warmth and definition on bass-clef instruments and low octave male vocals.
• On the bass-clef instruments, bass guitars sound resonant and raspy, double-basses sound weighty and mellow, and the bass kick drum sound dull and pounding, while on male vocals, both bass and bass-baritones have a full, resonating dark timbre to give a dense and woof-y sound characteristics.

MIDRANGE:

This particular frequency region noticeably has a slight recession between lower mids up to the upper mids but it doesn't sound too lean nor dry as it has an ample warmth with just enough energy for clarity, air and sheen on female vocals and some instruments. In general, it has a full, rich and somehow transparent midrange presentation that will deliver a realistic timbre and natural sound for both vocals and instruments.

• The lower midrange have a sufficient texture with a warmth and rich that will give a good vocal weight definition on male voices as baritones have plush and smooth sound, tenors have a sweet and juicy sound, and countertenors have a soft and hauntingly expressive sound from their falsettos, and also, a  certain female voice, the contraltos have a husky and smoky sound from their chesty vocal.
• The upper mid section has a just gentle boost just to give some clarity, airiness and presence on female vocals to sound more forward and some instruments won’t sound too thin or harsh as mezzo-sopranos sound velvety and rich, and the sopranos have creamy but less shimmering that this type of vocal known for.
• On the instruments, brasses like trumpets, trombones and horns, they sound full, round and ponderous respectively, while on the woodwinds, these type of instruments sound less brighter with a limited brightness as flute sound smoother, piccolos sound less brilliant and the saxophones have a rather sonorous and warm sound.
• The other types of instruments like strings and percussions, guitars sound more buttery, violins have a calm and soft sound, cellos have a full and mellow sounds, snares have a hard and shuffling sound for every stroke, tom-toms have a warm and sonorous sound, and the pianos have a rich, full and sweet sound.

HIGHS/TREBLE:

The treble quality of this one is pretty smooth, inoffensive and clear that make its tuning more friendly towards treble sensitive folk. It has enough boost on the presence section with a moderate airy extension on its brilliance section.

• A gentle boost around the presence or the lower treble section will give some sense of the clarity and definition for the articulation of vocals and attack on the instruments for both percussive and rhythmic ones.
• There's not a hint of sibilance, harshness or piercing sound.
• It has an average treble air extension and mild sparkle on its brilliance section.
• On some treble instruments, cymbals have a lustrous and undulating sound, hi-hats have a warm, crisp and dull sound, glockenspiels sound mellow and less bright and then, the celestas sound soft and bell-like.

SOUNDSTAGE, IMAGING & OTHER TECHNICALITIES:

While this is not the most technical sounding single dynamic driver that I've ever heard, but with its asking price, this one is fairly acceptable. Overall it has very competent technical performance that will be satisfying to audio enthusiasts.

• The soundstage size of this one is relatively above-average in my opinion but it is well-proportioned with its dimensions from a moderate length of its lateral span from left to right, with a good height reach and depth from front to rear.
• It projects a concave-like stereo imaging presentation, fairly-layered soundscape with a good separation of musical elements that I was able to pinpoint their placements within its acoustic landscape.
• The coherency of its driver performance is excellent as it has a fast transient response on its bass attack and good clarity and detail on the rest of the frequency parts.
• In regards to its resolution capabilities, it has firm, impact yet open macrodynamics that was able to highlight the varying degree of volume dynamics from its quietest part up to its loudest on both chorale lines and instrumental sections, whereas on its microdynamics, while it has a bit blunted definition on extracting fine details and other nuances from an audio playback like instrumental reverb tails, vocal delays and attack notations.

PEER COMPARISONS:

YUANDAO TEARS

• NICEHCK’s recently budget entry-level model and like the ARC, it has single driver configuration.
• It also has a 10mm dynamic driver housed in a compact 3D-printed pentagon-shaped shell with ABS material.
• On its product packaging, it does have more ear tips and it also has a PU-leather pouch for storage.
• Compared to the ARC, this one has a V-shaped sound signature as it has a fuller, deeper and more striking bass response, a recessed yet rich and warm midrange, and a brighter and more airy treble presentation.
• As for its technical performance, it is on par with ARC from soundstage size down to its microdynamics on extracting details and other subtleties.

KEFINE KLEAN SV

• KEFINE’s one of the latest models and a successor of their successful single driver entry-level model, the KLEAN.
• It has a 10mm dynamic driver with a DLC-coated diaphragm in a metal shell chassis, and also, it has interchangeable tuning filter nozzles.
• This one is fully-packed with accessories inside of its packaging box with a good quality cable, a storage case and more choices of ear tips to choose from.
• Since this earphone has a detachable tuning nozzle, it offers three tuning profiles, from warm V-shaped to U-shaped sound signatures, and all of these tuning settings have a brighter treble response and a tad airy compared to the ARC.
• On its technical performance, if compared to the ARC, it projects a more roomy soundstage and a sharper micro-detail definition.

LETSHUOER D02

• LETSHUOER’s entry-level set that was released last year, and like the ARC, has a single driver set-up.
• It sports a customised 11mm dynamic driver in a dual chamber structure and it was encased in a round composite shell.
• This one is also fully-packed with accessories like a cable, storage case and different types of eartips to choose from.
• It has a balanced-neutral sound signature as compared to the ARC, it also has a more sub-bass focused and a bit tighter bass response, a non-recessed and well-balanced midrange presentation as it has enough warmth and a bit energetic on it, and a tad brighter and sparkling treble response but with almost similar brilliance air extension.
• As for its technical performance, it has a more spacious soundstage, a 3D-like stereo imaging presentation and a sharper definition on its detail retrieval.

TINHIFI C2 2025 MECH WARRIOR

• The second variant of their MECH WARRIOR model, and it also has a single driver set-up.
• It features a 10mm dynamic driver with a composite diaphragm housed in an aluminium alloy shell chassis.
• On its product packaging, it is also minimalist in presentation with a meagre accessories, although it has more eartips that were included inside.
• This one has a U-shaped sound profile as it has a rumbly and tighter bass response, a more recessed, leaner and energetic midrange, and a brighter treble that is prone to tinniness and piercing sound compared to the ARC.
• When it comes to its overall technicalities, it has almost similar performance with the ARC but it has less immersive soundstage, a two-dimensional stereo imaging with less defined separation and layering, and lastly its microdynamics in which I think that it has a blunted definition due to less capable on extracting more fine details.

To sum up this product assessment, PULA AUDIO did a good job on this product as it has all the positive aspects that makes the ARC an excellent IEM headphone on its own right with its affordability, build quality, a mature coloured tuning and a decent technical performance. While it has some drawbacks like stock cable, a carrying case and a variety of ear tips, I will still recommend this set to audio enthusiasts looking for a budget option with a natural, inoffensive tuning yet engaging sound quality.

PULA AUDIO ARC will be exclusively available to HIFIGO, and for those who are interested, I just put down a link below.

LINK: 

https://hifigo.com/products/pula-audio-arc

More PULA AUDIO product reviews?

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■ PULA AUDIO UNICROM

SPECIFICATION:

MODEL: PULA AUDIO ARC

IMPEDANCE: 32Ω

SENSITIVITY: 104dB

FREQUENCY RESPONSE: 20Hz – 20KHz

CABLE LENGTH: 1.2m

PIN TYPE: 0.78mm 2-PIN CONNECTOR

PLUG TYPE:  3.5mm, USB TYPE-C

DRIVER UNIT(S):  (1) DYNAMIC DRIVER

MICROPHONE SUPPORT: YES (USB TYPE-C VARIANT)

PROS:

● Affordable pricing for budget-conscious audio enthusiasts.

● Compact and lightweight ergonomically-design shell chassis.

● Is it quite uncommon nowadays to see a non QDC-type two-pin connector on a  budget entry-level set.

● Deep, rumbly and punchy bass.

● Warm, rich and lush midrange presentation

● Plush, dense and smooth sound on male vocals like baritones, and then smoky and weight sound on contraltos.

● Smooth and inoffensive treble response.

● Not a hint of shrill-y, piercing and tinny sound.

● Excellent driver performance.

CONS:

● Meagre inclusions like just a single type of eartip and it doesn't include even a carrying pouch.

● Not the best stock cable that I’ve seen for a budget-entry level set.

● A bit coloured sounding for neutral heads.

● Less bright and airy sounding, therefore recommending this set to treble-headed audio enthusiasts will be out of question.

● Its overall technical performance is a bit lacklustre in my opinion.

TRACKS TESTED: ( * = 16-bit FLAC, ** = 24-bit FLAC, *'* = MQA, '*' = DSD, *'= .WAV)

Alison Krauss -When You Say Nothing At All *

Jade Wiedlin - Blue Kiss**

Led Zeppelin - When The Levee Breaks **

Mountain - Mississippi Queen *

Queen - Killer Queen **

Guns N' Roses - Patience *'*

Eric Clapton - Tears in Heaven '*'

Sergio Mendes- Never Gonna Let You Go '*'

Pearl Jam - Daughter **

Roselia - Hidamari Rhodonite *

Assassin - Fight (To Stop The Tyranny)*

Celtic Frost- Visual Aggression *

New Order - Blue Monday *

The Corrs- What Can I do (unplugged version) *

Jimi Hendrix Experience - Voodoo Child *

The Madness- Buggy Trousers *

Metallica - Motorbreath **

Mariah Carey- Always Be My Baby *

Destiny's Child - Say My Name *

Malice Mizer- Au Revoir *

Mozart - Lacrimosa *

New York Philharmonic Orchestra - Dvorak- Symphony 9 " From the New World." *

Eva Cassidy - Fields of Gold (Sting cover)*

Michael Jackson - Give In To Me *

Exciter - Violence and Force *

Diana Krall - Stop This World **

Debbie Gibson - Foolish Beat *'*

The Sisters of Mercy – Lucretia My Reflection**

Suzanne Vega – Luka **

Lauren Christy – Steep *

Ottoman Mehter - Hucum Marsi *

Diana Damrau - Mozart: Die Zauberflöte*

Type O Negative - Black No.1 *

Felix Ayo - Vivaldi: Presto **

Three Tenors - Nessum Dorma *

Mercyful Fate - Witches' Dance *

P.S.

I am not affiliated to PULA AUDIO nor receive monetary incentives and financial gains as they provide me a review unit for an exchange of factual and sincere feedback from yours truly.

Once again, I would like to send my gratitude to the HIFIGO REP for providing this review unit. I truly appreciate her generosity and trust towards me and other reviewers.