Home theater enthusiasts have a new benchmark for picture and sound quality with the arrival of September 2026's slate of 4K Blu-ray releases. Tested on a reference LG G6 OLED television and a newly upgraded Denon and Bowers & Wilkins speaker system, discs like Supergirl from Warner Bros. showcase what the format can achieve.

What You Need to Know

TechRadar's AV reviewer tested ten new 4K Blu-rays from September 2026 using an LG G6 OLED and a new Denon AVC-3900H receiver with Bowers & Wilkins speakers. The evaluation focused on picture and audio quality, not the films themselves. This month's lineup includes Supergirl from Warner Bros. and Star Wars: The Mandalorian & Grogu, both delivering reference-grade Dolby Vision and Dolby Atmos presentations. The Blu-ray Bounty series, produced by Future, continues to serve as a rigorous test bed for home theater gear.

Home Theater Setup Gets a Major Upgrade

TechRadar's test lab moved from a Samsung soundbar to a full separate Denon and Bowers & Wilkins system. The new rig includes the Denon AVC-3900H AV receiver, a pair of B&W 603 S3 floorstanders for front channels, a pair of B&W 607 S3 bookshelf speakers for surrounds, a B&W HTM6 S3 center speaker and a B&W ASW610 subwoofer. This 5.1 setup will soon expand to 7.1 with two additional side speakers.

  • Denon AVC-3900H: Delivers precise channel mapping and dynamic range for Dolby Atmos soundtracks.
  • B&W 603 S3: Floorstanding speakers provide deep, controlled bass and clear dialogue reproduction.
  • B&W ASW610 subwoofer: Adds rumble for explosions and spaceship engines without distortion.

Picture Quality Standouts

Supergirl from Warner Bros. looks superb in 4K with Dolby Vision. The LG G6 OLED reproduces the vivid Colors of neon signs and Supergirl's costume with punch and accuracy. Scenes in space benefit from rich black tones and strong contrast, balancing darkness with bright stars. Textures are crisp, bringing realistic detail to faces, environments and objects. The disc's black levels and contrast make every frame pop, especially during action sequences.

Star Wars: The Mandalorian & Grogu also excels. The Dolby Vision presentation delivers lifelike textures and 3D-like depth. Character armor gleams against dark backgrounds, and lush greens on forest planets appear natural. This disc also leverages the LG G6's ability to handle high dynamic range without clipping highlights.

Audio Immersion on New System

Both discs feature Dolby Atmos soundtracks that fully exploit the new Denon and Bowers & Wilkins setup. On Supergirl, sound accurately tracks the character's flight, moving seamlessly from speaker to speaker. The boom of spaceship engines and the impact of fight scenes generate hefty, well-controlled bass that shakes the room without muddiness. The Mandalorian & Grogu delivers similar excellence: gunfire has weight, explosions rumble through the subwoofer and ambient sounds create a convincing sound field.

Why This Matters

These September 2026 releases reinforce that 4K Blu-ray remains the definitive way to experience home theater. For collectors and enthusiasts, the combination of reference-grade discs like Supergirl and a high-end audio chain proves that physical media can still outperform streaming. The upgrade to a Denon and Bowers & Wilkins system also shows how essential proper audio is for unlocking the full potential of Dolby Atmos. As streaming services compress audio and video, discs offer uncompromised quality. This month's Blu-ray Bounty lineup, curated by Future, gives viewers a reason to invest in premium hardware. The clear Colors, detailed Scenes and sharp Textures on display are a direct result of the format's capacity for lossless data. The LG G6 OLED paired with this audio system sets a new standard for at-home movie watching.