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NEBULA Cosmo 4K SE Projector

$899.98 ~~$1,299.99~~ at Amazon.com

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SUMMARY: The NEBULA Cosmos 4K SE serves as a portable projector with straightforward setup and built-in streaming capabilities. It performs adequately in dim environments but shows limitations in contrast and brightness under ambient light. Audio output is functional for small groups, though external speakers enhance immersion. Gaming input is responsive for casual play, yet not suited for competitive scenarios. Overall, it offers practical value for users prioritizing convenience over premium performance, with some interface sluggishness noted in reviews.

Best Used For: home cinema viewing in dim rooms, casual gaming sessions, business presentations

Released: 2024

Brand: NEBULA

Specification	Details
Brightness	~1200-1450 ANSI Lumens
Resolution	4K UHD (3840x2160)
Contrast Ratio	400:1 (advertised, native)
Throw Ratio	~1.2
Min/Max Throw Distance	1.69m-5.3m (60-200 inches)
Lamp Life	30000 hours
Connectivity	HDMI 2.1 (eARC), USB-A, 3.5mm AUX, Wi-Fi, Bluetooth
Keystone Correction	Auto keystone with IEA 4.0 technology
Zoom Lens	fixed lens
Input Lag	~ 18.5 ms for 1080P/4K@60Hz
Audio Output	2x15W stereo speakers with Dolby Audio
Aspect Ratio	16:9 native
Weight (kg)	4.5 kg
Lens Shift	Not available
Controller Type	Bluetooth remote with backlight, Nebula Connect app
Noise Level (dB)	30-35 dB
Size of Projection	Up to 200 inches

Highlights

The NEBULA Cosmos 4K SE stands out as a versatile smart projector tailored for home entertainment, gaming, and office use, incorporating advanced features such as Dolby Vision support and Google TV integration. It promises a cinematic experience with a large projection size, but users should note that while it excels in controlled lighting, real-world performance varies based on environmental factors.

Advertised at 1,800 ANSI Lumens brightness, the projector is positioned for use in various lighting conditions, including brighter rooms. However, reality checks from multiple reviews and tests reveal measured brightness around 1,219-1,450 lumens depending on the mode, making it sufficiently bright for ambient light scenarios but prone to some washout in HDR content or darker scenes where the full advertised output isn’t consistently achieved.

The resolution is marketed as 4K UHD (3840×2160), aiming to deliver ultra-high-definition visuals. In practice, this is accomplished through pixel-shifting technology from a native 1080p DLP chip, resulting in sharp, 4K-like detail that garners positive feedback for clarity in reviews, though it falls short of true native 4K resolution, which affects the finest details in demanding content.

Contrast ratio is implied to be enhanced by Dolby Vision, with an advertised figure around 400:1 or higher through processing. Real-world assessments indicate low actual contrast, leading to grayish blacks and limited depth in dark scenes, rendering it less ideal for high-contrast media like horror films or night skies, as consistently noted across user experiences and expert evaluations.

With a throw ratio of approximately 1.2:1, the projector requires specific placement distances to achieve desired screen sizes. This has been confirmed in tests, necessitating about 1.69m for a 60-inch screen and up to 5.3m for 200 inches, which limits its suitability for small spaces without short-throw options, though the min/max throw distances match advertised specs in practical applications.

Lamp life is advertised at 30,000 hours using a hybrid laser/LED light source, suggesting long-term reliability. While no extensive long-term tests are available, hybrid sources generally last 20,000-30,000 hours with minimal degradation, and short-term reviews affirm its stability, making it a durable choice for frequent use without immediate concerns over bulb replacement.

Connectivity options include HDMI 2.1 (eARC), USB-A, 3.5mm AUX, Wi-Fi, and Bluetooth, all functioning as promoted. Reviews highlight that HDMI supports 4K@60Hz and eARC performs well for audio pass-through, but the limited number of ports—only two HDMI—has been pointed out as a potential drawback for users with multiple devices.

Keystone correction features auto keystone with IEA 4.0 technology, enabling easy setup in imperfect positions. It works effectively for automatic adjustments, though digital correction can slightly reduce resolution, and manual alignment is often recommended for optimal quality, as verified in hands-on tests.

The projector lacks a zoom lens, relying on a fixed lens where image size is adjusted solely by distance, which confirms the advertised absence of optical zoom and restricts flexibility in fixed installations, requiring precise positioning to achieve the desired projection scale.

Input lag is advertised as less than 19 ms in Extreme Game mode, positioning it for gaming. Measurements confirm around 18.4 ms for 1080p/4K@60Hz, suitable for casual gaming but not for ultra-competitive play, with the lowest lag achieved by disabling keystone correction, as detailed in gaming-focused reviews.

Audio output consists of 2x15W stereo speakers with Dolby Audio, providing decent volume and clarity for built-in sound. However, it lacks deep bass and can sound treble-heavy, leading many users to prefer external speakers for a more immersive experience, though the integrated setup suffices for smaller rooms or casual viewing.

The native aspect ratio is 16:9, handling other ratios through scaling without issues in tests, ensuring compatibility with a wide range of content from movies to presentations.

Weighing exactly 4.5 kg as advertised, the projector includes a handle for portability, but its bulk makes it less ideal for frequent carrying, better suited for semi-permanent setups or moving between rooms rather than true on-the-go use, according to user feedback.

Without lens shift, precise positioning is essential, with reliance on keystone for adjustments, confirming the advertised absence of this feature and emphasizing the need for careful placement to avoid distortion.

The controller type includes a Bluetooth remote with backlight and the Nebula Connect app, both responsive and convenient, especially the backlit remote for dark environments. The app enhances usability, though the Google TV interface may feel sluggish due to hardware limitations, as observed in performance reviews.

Noise level, while not explicitly specified and implied to be low, measures around 30-35 dB in operation, quiet enough to not distract during viewing and often praised for its unobtrusive fan sound in various settings.

Projection size reaches up to 200 inches as advertised, achievable with adequate distance, but image quality degrades in bright rooms, with optimal performance at 100-120 inches for maintaining brightness and detail, based on real-world usage scenarios.

Additional features encompass Google TV, Dolby Vision, auto setup (focus/keystone/obstacle avoidance), Wall Color Adaptation, and the NebulaMaster engine. These perform well overall: Dolby Vision boosts colors despite contrast limitations, auto setup is reliable and quick, Google TV offers native Netflix support but can be slow, prompting some to use external devices for enhanced streaming smoothness.

In essence, the NEBULA Cosmos 4K SE excels in delivering a balanced smart projector experience with strong emphasis on ease of setup and integrated streaming capabilities. Its pixel-shifted 4K visuals and gaming-friendly low input lag make it appealing for multimedia enthusiasts, though tempered expectations regarding brightness, contrast, and audio depth ensure it shines best in dimmer environments for home theater or casual gaming sessions.

Amazon Price History

Date	Price (USD)
2025-07-10	1299.99
2025-08-11	899.99
2025-09-01	1299.99
2025-09-25	1049.99
2025-10-28	899.98
2025-11-01	899.98
2025-11-02	899.98

Since 2025-07-10

Auto Product Comparison

Product	NEBULA Cosmo 4K SE Projector	CiBest G1 Projector	JMGo N1 Ultra Projector	Epson LS800 Projector
Image
Badges	Best Deal
Price	$899.98 ~~$1,299.99~~ at Amazon.com	N/A at Amazon.com	$999.00 at Amazon.com	$2,399.99 at Amazon.com
Brand	NEBULA	CiBest	JMGo	Epson
Check Details		Check Details	Check Details	Check Details
Brightness	~1200-1450 ANSI Lumens	240 ANSI Lumens	2200 ANSI Lumens	4000 lumens (dynamic mode), 2000-3000 lumens (natural mode)
Resolution	4K UHD (3840x2160)	1920 x 1080 (Full HD)	4K UHD (3840x2160)	4K PRO-UHD
Contrast Ratio	400:1 (advertised, native)	2500:1	1600:1	2500000:1 (dynamic), 1000:1 (native)
Throw Ratio	~1.2	1.25	1.2:1	0.16-4.0
Min/Max Throw Distance	1.69m-5.3m (60-200 inches)	not specified	For 100-150 inch screen: 2.6m - 4m	17.3 inches for 100 inches, 20.2 inches for 120 inches, 24.2 inches for 150 inches
Lamp Life	30000 hours	30000 hours	30000 hours	20000 hours
Connectivity	HDMI 2.1 (eARC), USB-A, 3.5mm AUX, Wi-Fi, Bluetooth	HDMI, USB, AV, 3.5mm audio, WiFi, Bluetooth	2x HDMI 2.1, 1x USB, Wi-Fi, Bluetooth	3x HDMI 2.0 (1 ARC), Audio Out (S/PDIF Optical, Stereo Mini), 3x USB Type A, 1x USB Type B (service)
Keystone Correction	Auto keystone with IEA 4.0 technology	Manual vertical	Automatic	horizontal and vertical
Zoom Lens	fixed lens	Digital zoom 100%–50%	fixed	Digital zoom 1.0–2.5
Input Lag	~ 18.5 ms for 1080P/4K@60Hz	~42 ms	~28-35ms	1080p/120 Hz: 12.3 ms; 4K/60 Hz: 21 ms
Audio Output	2x15W stereo speakers with Dolby Audio	Built-in 10W stereo speakers	Dynaudio 2x10W speakers	20 W built-in speakers (Yamaha DSP 2.1, 2x 5 W + 1x 10 W subwoofer)
Aspect Ratio	16:9 native	16:9	16:9	16:9 native
Weight (kg)	4.5 kg	2.45	4.5 kg	12.5 kg
Lens Shift	Not available	not available	not available	Not available
Controller Type	Bluetooth remote with backlight, Nebula Connect app	remote control	Remote Control	Remote Control
Noise Level (dB)	30-35 dB	~42 dB	< 33 dB	23 dB (quiet mode), 32 dB (normal mode)
Size of Projection	Up to 200 inches	50 to 300 inches diagonally	60-150 inches, recommended 100-150 inches	Up to 150 inches
Connectivity	HDMI 2.1 (eARC), USB-A, 3.5mm AUX, Wi-Fi, Bluetooth	HDMI, USB, AV, 3.5mm audio, WiFi, Bluetooth	2x HDMI 2.1, 1x USB, Wi-Fi, Bluetooth	3x HDMI 2.0 (1 ARC), Audio Out (S/PDIF Optical, Stereo Mini), 3x USB Type A, 1x USB Type B (service)