Sendy Audio has unveiled the Apollo PRO, a new open-back planar magnetic headphone designed to deliver high-resolution sound while addressing one of the most common concerns among planar headphone enthusiasts: weight. Combining a newly developed planar driver, premium materials, and a lightweight chassis, the Apollo PRO aims to offer an engaging listening experience that remains comfortable during extended sessions.
The Apollo PRO enters the market as Sendy Audio's latest premium headphone and is aimed at audiophiles seeking the speed, transparency, and spacious presentation traditionally associated with planar magnetic technology.
Advanced 78mm Planar Magnetic Driver
At the heart of the Apollo PRO is a custom-developed 78mm planar magnetic driver built around an ultra-thin nano-scale composite diaphragm. Measuring less than 800 nanometers in thickness, the diaphragm has been engineered to minimize moving mass, enabling faster transient response, improved detail retrieval, and enhanced microdynamic performance.
According to Sendy Audio, the large planar driver delivers an expansive soundstage with excellent instrument separation and precise imaging, characteristics that are particularly valued in high-end headphone listening. The design is intended to provide a natural and highly resolving presentation across a wide range of musical genres while also offering the spaciousness required for films and gaming.
A notable feature of the driver assembly is Sendy Audio's proprietary Electron Beam Evaporation Deposition technology. This manufacturing process applies an ultra-precise aluminum conductive layer directly onto the diaphragm surface, improving consistency and reducing unwanted resonance. The result is said to be greater linearity throughout the frequency range and improved control over driver movement, contributing to a cleaner and more refined sonic presentation.
Open-Back Design With Premium Materials
The Apollo PRO features an open-back acoustic architecture designed to reduce internal reflections and create a more natural sense of space. The headphone combines handcrafted zebrawood earcups with a distinctive sunburst-pattern metal grille, giving it a premium appearance while supporting acoustic transparency.
The use of natural wood remains a hallmark of Sendy Audio's design philosophy, offering both visual appeal and acoustic benefits. The open structure allows the planar driver to operate with minimal enclosure coloration, helping preserve detail and tonal accuracy.
Lightweight Construction For Extended Listening
While many planar magnetic headphones are known for their substantial weight, Sendy Audio has focused heavily on comfort with the Apollo PRO. Weighing just 354 grams, the headphone is significantly lighter than many competing planar designs.
The lightweight frame is complemented by CNC-machined aviation-grade aluminum components and an adjustable suspension system designed to distribute weight evenly across the head. Breathable velvet ear pads and a premium lambskin leather headband further enhance long-term comfort by reducing heat buildup and pressure during lengthy listening sessions.
The combination of low weight and ergonomic design makes the Apollo PRO particularly attractive for listeners who spend hours enjoying music, gaming, or movie soundtracks.
Balanced Connectivity Included
Sendy Audio supplies the Apollo PRO with a premium detachable cable constructed from Furukawa oxygen-free copper, silver-plated copper conductors, and enamel-coated gold-plated copper strands. The cable also incorporates graphene-enhanced shielding designed to minimize interference and preserve signal integrity.
A 4.4mm balanced termination is included as standard, alongside adapters for both 3.5mm and 6.35mm outputs, allowing the headphone to be used with a wide variety of portable players, headphone amplifiers, DACs, and desktop audio systems.
Frequency Response And Availability
The Apollo PRO offers a specified frequency response of 20 Hz to 40 kHz, covering the full audible spectrum while extending well beyond it. Combined with its large planar driver and lightweight construction, the headphone is positioned as a versatile solution for both dedicated audiophile listening and modern high-resolution audio systems.
The Sendy Audio Apollo PRO is available now with a recommended retail price of £449 / $449 / €499.
Specifications
• Driver Type: Planar Magnetic
• Driver Size: 78mm
• Diaphragm: Nano-scale composite diaphragm (<800nm)
• Design: Open-back
• Weight: 354g
• Frequency Response: 20Hz – 40kHz
• Earcups: Zebrawood
• Cable: Detachable balanced cable included
• Connections: 4.4mm balanced, 3.5mm adapter, 6.35mm adapter
• Headband: Premium lambskin leather
• Ear Pads: Breathable velvet
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