If you are someone who loves open-back planar headphones, the Sendy Audio Apollo Pro deserves your full attention. This is not a headphone category that gets covered as often as it should, but the Apollo Pro makes a strong case for why it should be talked about more.
With 78mm planar magnetic drivers, an 800nm thick diaphragm, and a premium build throughout, this headphone brings a lot to the table for audiophiles and enthusiasts alike.
Table of Contents
Design and Build Quality
The Sendy Audio Apollo Pro immediately stands out in terms of its visual identity. It uses a metal frame paired with a suspension-style headband wrapped in lamb leather, which gives it both a premium feel and a comfortable fit.
The highlight of the design is easily the natural zebra wood used on the ear cups, combined with a sunburst metal grill on the outside that looks genuinely impressive. It is the kind of headphone that looks good sitting on a desk just as much as it does on your head.
Since this is an open-back headphone, everything you listen to can be heard by people around you almost as clearly as you hear it yourself. That is just the nature of open-back designs, and it is worth keeping in mind before purchasing.
The ear pads use velvet on the part that touches your skin, making them breathable and far more comfortable over long sessions compared to standard pleather or leather options. The angled design of the pads also helps with coverage and comfort.
Despite looking fairly large, the Apollo Pro is actually a very light headphone. It does not clamp tightly against your head, and it stays secure even when you move around. Compared to many other large planar headphones that have oversized, obnoxiously wide metal frames, the Apollo Pro feels relatively low-profile and well-proportioned.
Cable and Accessories
The included cable is a thick, braided silver-plated copper cable with dual 3.5mm connectors on the headphone end. The default connection on the other end is a 4.4mm balanced plug, and the package also includes a 3.5mm adapter and a quarter-inch adapter, so you have flexibility depending on your setup.
One minor complaint is with the 3.5mm adapter. Rather than being a simple jack swap, it adds an extension of the braided cable, which looks a bit excessive and clunky. A cleaner twist-off jack style would have been a better solution here. That said, the cable itself is undeniably premium in quality.
For storage, Sendy Audio includes a hemp pouch to keep your cables organized, along with a leather carry case for the headphones. The case is genuinely well-made and looks high-end, though its design on the bottom is a bit of an unusual visual choice. Either way, the overall accessory package is solid and reflects the premium positioning of the product.
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Powering the Apollo Pro
One of the more pleasant surprises with the Sendy Audio Apollo Pro is how easy it is to drive. With an impedance of just 27 ohms and a sensitivity of 93 dB, you can plug these directly into a phone, laptop, or any standard device and still get decent volume with solid performance across the low end, mids, and highs. You do not need an amplifier just to make them work.
That said, pairing these with a dedicated amp makes a noticeable difference. The sound opens up, the details become more refined, and everything feels more complete. So while an amp is not required, it is strongly recommended if you want to get the absolute best out of the Apollo Pro.
Sound Quality
The most accurate way to describe the Sendy Audio Apollo Pro is that it is a fast headphone. The 800nm diaphragm plays a significant role here, allowing the drivers to keep up effortlessly with demanding music like metal, where double bass and rapid drum patterns can easily expose a slower headphone.
Even in genres where a lot is happening at once, the Apollo Pro keeps everything well-separated without turning into a cluttered mess of sound.
Despite its speed, the Apollo Pro does not sacrifice low end. It delivers sub-bass and thump without pulling back just to appear faster. There is a natural warmth to the sound, which is characteristic of planar magnetic headphones, and it helps everything feel organic and natural rather than artificial or processed.
Now, if you are a bass head chasing subwoofer-level rumble, this is not the headphone for you. But it is also not flat or neutral. The Apollo Pro sits in an enjoyable middle ground where the low end is present and engaging without being exaggerated.
The mids have a slightly forward presentation, which helps vocalists and guitar tones stand out clearly from the rest of the mix. The treble is detailed and clear without ever crossing into harsh or overly bright territory. Nothing is overdone, but everything is pushed just enough to make these headphones genuinely fun to listen to.
Soundstage and Imaging
The soundstage on the Apollo Pro is good, though it is not as wide or as airy as some other open-back headphones out there. It still gives you the feeling of being in a large room, but it falls short of that true concert hall expansiveness that some open-back designs deliver. Part of this may be due to the slightly dynamic tuning that gives these headphones their punch and presence.
Where the Apollo Pro really shines is in its sound imaging. The ability to pinpoint where different sounds are coming from is excellent, which makes these headphones a surprising standout for gaming.
Directional audio is handled incredibly well, and the way individual sounds are pulled apart and placed in the mix makes gaming an immersive and engaging experience.
Specifications Table
| Feature | Details |
|---|---|
| Driver Type | Planar Magnetic |
| Driver Size | 78mm |
| Diaphragm Thickness | 800nm |
| Impedance | 27 Ohms |
| Sensitivity | 93 dB |
| Headphone Type | Open-Back |
| Headband Material | Lamb Leather |
| Ear Pad Material | Velvet |
| Wood Type | Natural Zebra Wood |
| Cable Type | Silver-Plated Copper Braided |
| Cable Connectors | Dual 3.5mm (headphone side) |
| Default Output Connector | 4.4mm Balanced |
| Included Adapters | 3.5mm and 6.35mm (Quarter-Inch) |
| Included Accessories | Hemp Cable Pouch, Leather Carry Case |
| Price | $450 |
Final Verdict
At $450, the Sendy Audio Apollo Pro is not something the average consumer will walk into on impulse. But for audiophiles, enthusiasts, and anyone who takes their listening experience seriously, the price is absolutely justified. The build quality, the materials, and the sound performance all reflect a product that was made with care and intention.
These headphones work well across music, movies, and gaming, making them genuinely versatile rather than being excellent in just one area. The only functional limitation worth noting is the absence of a microphone, so online gamers will need a separate external mic. But if that is not a concern for you, the Apollo Pro is an easy recommendation that delivers consistent enjoyment across everything you throw at it.
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