If you want a portable, highly customizable in-ear monitor that delivers deep bass and crystal clear vocals for on-the-go listening, choose FiiO FH5s; if you need high-fidelity studio reference headphones with superior sound isolation for critical mixing or long home sessions, choose beyerdynamic Box.
• FiiO FH5s: Delivers massive, tunable bass with a semi-open design for comfort, but requires a dedicated amplifier to drive its 40-ohm impedance effectively.
• beyerdynamic Box (DT 770 Pro): Offers industry-leading build quality and excellent passive noise isolation with a closed-back design, though the heavy 250-ohm impedance demands significant power from your source.
• Who picks the FiiO: The audiophile who travels, values portability, and wants to tweak their sound signature without buying new gear.
• Who picks the beyerdynamic Box: The home listener or professional who prioritizes accurate, isolated sound and durability over mobility.
The FiiO FH5s is engineered specifically for the audiophile who refuses to compromise on sound quality while maintaining a mobile lifestyle. This isn't just another set of earbuds; it is a hybrid system that combines a massive 12mm beryllium-plated dynamic driver for low frequencies with a separate 6mm beryllium-plated driver for mids and a Knowles TWFK-30017 balanced armature for highs. This multi-driver architecture allows for a level of detail and separation that few competitors can match at this price point. The inclusion of three physical tuning switches gives you eight distinct sound signatures, meaning you can adjust the bass, midrange, and treble balance to suit whatever genre you are listening to or whatever acoustic environment you are in.
For the traveler or the commuter, the FH5s shines because of its semi-open rear cavity design. Unlike fully sealed in-ears that create a vacuum effect and cause ear fatigue after an hour, this design balances air pressure between the front and rear chambers. This results in a more natural listening experience during long sessions, whether you are on a plane or walking through a busy city. The twist-lock swappable plug is another practical feature that appeals to those who want versatility. You can switch between 2.5mm, 3.5mm, and 4.4mm connectors to match your specific digital-to-analog converter or player, ensuring you always have the best connection possible without needing dongles or adapters.
We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-10-25 · 7 min read · Independent comparison
However, this performance comes with specific trade-offs that potential buyers must accept. The FH5s is not a wireless solution; it relies entirely on wired connectivity via the included four-strand 120-core silver-plated cable. While this ensures zero latency and maximum data transfer for audio fidelity, it means you are tethered to your source device. Furthermore, while 40 ohms is manageable for many modern players, pushing these drivers to their full potential often benefits from a dedicated headphone amplifier. If you are looking for the "best wireless headset for audiophiles," the FH5s will not fit that category, as its strength lies in its wired, high-resolution capabilities rather than Bluetooth convenience. It is also not designed as a sports earbud; the intricate internal structure and lack of active sweat resistance features mean it is better suited for stationary or casual use rather than intense physical activity.
The beyerdynamic Box, representing the legendary DT 770 Pro in a 250-ohm configuration, is built for the purist who treats music as an art form to be studied and appreciated in a controlled environment. This is a closed-back, over-ear design that has become a staple in recording studios, post-production houses, and broadcast facilities worldwide. The primary goal here is accurate, isolated sound reproduction. The closed-back construction creates a seal around the ears that prevents external noise from bleeding in and stops sound from leaking out, making it the ideal choice for anyone working in noisy environments or needing total immersion. The integration of a low-mass coil and diaphragm assembly produces a sonic quality that rivals electrostatic systems, offering a level of transparency and detail that is essential for critical listening and mixing.
For the home audiophile, the comfort factor cannot be overstated. The DT 770 Pro features plush ear pads that distribute weight evenly across the head, allowing for marathon listening sessions without the pain points common with other high-end headphones. The durable build quality, characterized by the fabric-covered headband and robust metal components, suggests these headphones are built to last decades rather than seasons. The 250-ohm impedance is a deliberate engineering choice; it makes the headphones harder to drive but allows for tighter control over the driver movement when paired with sufficient amplification. This results in a clean, uncolored sound that reveals every nuance in a recording, from the subtle decay of a cymbal to the breath of a vocalist.
There are limitations, however, that define who should skip this product. At 250 ohms, these headphones require a powerful amplifier to perform correctly. Plugging them into a standard smartphone or laptop jack will result in quiet volume and muddy, lifeless sound. They are not suitable for the user seeking the "best crystal clear calls headphone" in a traditional sense, as they are not designed with microphones or call-handling features in mind. Additionally, the closed-back design, while excellent for isolation, can create a slight feeling of confinement compared to open-back designs, and the larger over-ear form factor makes them unsuitable for running or gym workouts. They are strictly a desktop or home-bound experience, intended for those who value sonic accuracy above all else and have the equipment to power them properly.
• Best for portability → FiiO FH5s: Its compact, in-ear form factor and detachable cable make it easy to carry anywhere, unlike the bulky over-ear design of the beyerdynamic Box.
• Best for sound isolation → beyerdynamic Box: The closed-back design provides superior passive noise cancellation, blocking out distractions far better than the semi-open FH5s.
• Best for customization → FiiO FH5s: With three physical switches offering eight sound variations, you can tailor the frequency response to your preference instantly.
• Best for studio work → beyerdynamic Box: The 250-ohm impedance and neutral tuning make it a trusted tool for professionals requiring accurate mixes.
• Best for battery-free listening → Both products: Neither model uses batteries, eliminating charging anxiety, though both rely on wired connections.
• Best for long-term durability → beyerdynamic Box: The industrial-grade build quality and fabric wrapping suggest a lifespan that exceeds typical consumer electronics.
• Best for detailed treble → FiiO FH5s: The dedicated balanced armature driver excels at reproducing exquisite, airy highs without harshness.
• Best for deep, controlled bass → FiiO FH5s: The Tesla-inspired 12mm dynamic driver delivers potent low frequencies that remain tight and non-muddy.
If I were shopping today for a single pair of headphones to satisfy my personal needs as an audiophile, I would choose the FiiO FH5s. The ability to tune the sound signature to my mood, combined with the incredible portability and the semi-open design that prevents ear fatigue, offers a versatility that the beyerdynamic Box simply cannot match outside of a studio setting. The beyerdynamic Box is undeniably a masterpiece of engineering for fixed locations, but for the modern listener who moves between environments, the FH5s provides the perfect balance of high-fidelity performance and daily usability. I recommend the FiiO FH5s for the audiophile who wants one pair of headphones that can handle everything from classical recordings to electronic beats without sacrificing clarity or comfort.
Neither the FiiO FH5s nor the beyerdynamic Box includes a built-in microphone or call controls, so neither is suitable for taking phone calls directly from the headphones.
Yes, the beyerdynamic Box has a 250-ohm impedance that requires a dedicated amplifier to reach proper volume levels, while the FiiO FH5s at 40 ohms works with most devices but benefits from amplification for full detail.
The beyerdynamic Box offers superior isolation due to its closed-back design, which blocks external noise much more effectively than the semi-open acoustic design of the FiiO FH5s.
Yes, the FiiO FH5s features a twist-lock swappable plug system that allows you to easily switch between 2.5mm, 3.5mm, and 4.4mm connectors to match your playback equipment.
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