ULTIMEA Poseidon D80 Boom 1‑Week Review: Is This 7.1 Dolby Atmos Soundbar Worth It?

I’ve been using the ULTIMEA Poseidon D80 Boom 7.1 Dolby Atmos soundbar for a little over a week, and in this post, I want to share my honest experience with it as my main home theater and gaming setup. This is not a paid review, but ULTIMEA did send the unit for free so I could test it and share my thoughts.

In this review, I’ll walk through the unboxing, design and build quality, setup, features I like and don’t like, real‑world performance for movies, TV, music, and Nintendo Switch 2 gaming, and finally who I think this soundbar is actually for.

If you prefer watching instead of reading, you can check out the full video review here:

Unboxing: What’s in the Box?

The Poseidon D80 Boom comes in a box that already screams “full home theater kit.” On the outside you see the ULTIMEA branding, an image of the entire system, and highlights like “7.1 Channel,” “Dolby Atmos,” and the SurroundX upmix feature.

Inside the box, here’s everything included:

- Main soundbar (front left, right, and center channels)  

- Four satellite surround speakers  

- Large wireless subwoofer  

- Power cables and adapters  

- HDMI cable  

- Optical cable  

- Remote control  

- Mounting kit  

- User manual  

In other words, you get a complete 7.1 surround system right out of the box, without needing to buy extra rear speakers later.

Design and Build Quality

The first thing that surprised me is how compact the main soundbar is compared to my older Samsung Q‑series soundbar. It’s smaller, but inside that single bar you’re getting the left, right, and center channels. On paper that sounds cramped, but in practice it works much better than I expected.

On the back of the soundbar you get:

- Power port  

- Outputs for the front left and right surround speakers  

- 3.5 mm audio input  

- Optical input  

- USB  

- HDMI and HDMI eARC  

- HDMI IN for your device (like a console or streaming box)  

There are also mounting holes if you want to wall‑mount the soundbar. On top, you’ll find touch‑sensitive controls for power, input, Bluetooth, and volume, along with the ULTIMEA logo and Dolby Atmos / HDMI branding.

Build quality is genuinely solid. The metal mesh on the front has a subtle gray tone that matches the touch panel, and the rest of the body is a clean matte black. The overall design is minimalist and modern. The four satellite speakers follow the same visual language - same mesh, same finish, same clean look - so the whole system feels cohesive.

The wireless subwoofer is big, and that’s a good sign for bass lovers. On the back, it has a power button, sync button, power port, and the ports for the rear left and right speakers. Underneath is the large driver that handles those low frequencies. Just like the soundbar and satellites, the subwoofer looks minimal and well‑built, with rounded corners that make it less “boxy” in a living room.

Features and Real‑World Performance

Dolby Atmos and Surround Experience

The Poseidon D80 Boom supports Dolby Atmos, and that’s one of its biggest selling points. It doesn’t use up‑firing drivers like some higher‑end systems, but with proper Atmos or 7.1 content, it still creates a convincing surround effect.

When I watched Atmos‑enabled movies and series using my Onn 4K Pro, each channel felt distinct and directional. Effects moved around the room instead of just staying in front of me, and the subwoofer had more than enough power to deliver weighty, cinema‑style low end during action scenes.

Dialogue is a big win here. Compared to my Samsung Q‑series, the Poseidon D80 Boom pushes voices forward a bit more, which makes dialogue clearer even in busy scenes. I personally prefer that because I’d rather hear voices properly than rely on subtitles all the time.

4K HDR Passthrough and Nintendo Switch 2

Another feature I really appreciate is 4K HDR passthrough via HDMI eARC and HDMI IN. I connect my Nintendo Switch 2 directly to the soundbar, and it passes 4K HDR to my TCL QLED TV without issues. My TV supports LPCM 5.1, which the Switch 2 can output, so everything plays nicely together.

Nintendo Switch 2 audio can be a bit of a love‑hate topic, but with the Poseidon D80 Boom and its SurroundX up-mix tech, all speakers - including the sub - get used to create a much more immersive soundstage. Games like Mario Kart World and Hyrule Warriors: Age of Imprisonment suddenly feel bigger and more alive.

Even in open‑world games like Breath of the Wild and Tears of the Kingdom, being surrounded by ambient sounds and environmental effects adds a layer of immersion that I didn’t fully appreciate until using this setup.

Volume and Bass

The “Boom” in the name is accurate. The wireless subwoofer hits hard when the content demands it, delivering those punchy, cinematic low frequencies you expect from a theater. In my room, a volume level of around 15 (out of 100) is already comfortably loud and enough to fill the space.

Setup and Installation

Setup is one area where the Poseidon D80 Boom really impressed me with its simplicity.

The cables are labeled and color‑coded, so it’s easy to match each plug to the correct port without even opening the manual. When I powered on the soundbar and the subwoofer, they paired automatically - no extra pairing steps needed. I placed each satellite speaker in its spot, connected my input device to HDMI IN, then ran another HDMI cable from the soundbar’s eARC port to my TV, and that was basically it.

For a full 7.1 system, this is about as straightforward as it gets.

Pros and Cons After a Week

What I Like

Price for a full 7.1 setup: The entire system is priced around 300 USD or less, depending on where you buy it. For comparison, my Samsung Q‑series soundbar plus its separate surround kit cost around 500 USD in total. Getting a complete 7.1 system with Atmos support at this price point is impressive.

True surround out of the box: Many soundbars in this price range only give you front‑firing speakers, so you never really get that “sound all around you” feeling. The Poseidon D80 Boom ships with four satellites and a sub from day one, so you immediately get a proper surround experience.

Wireless subwoofer flexibility: Because the sub is wireless, I can place it wherever it sounds best in my room without worrying about running a long cable back to the soundbar. That flexibility makes a huge difference in dialing in the bass.

Clear dialogue and strong movie/gaming performance: For movies and games, this system does exactly what I want: clear voices, big soundstage, and powerful low end.

What I Don’t Like

The remote design: Functionally, the remote is powerful - you get direct buttons for lots of features. Visually, it’s big and very busy, with a lot of buttons packed into one piece. Some people might like all those shortcuts, but I personally prefer a simpler, more minimalist remote design.

Music listening (stereo): When it comes to music, especially stereo tracks, I’m not in love with how the Poseidon D80 Boom sounds. Even after tweaking settings multiple times, I find the sound a bit thin and lacking in clarity for my taste with music. For movies and games, it’s great. For dedicated music listening, I still prefer my Edifier bookshelf speakers.

Who Should Buy the ULTIMEA Poseidon D80 Boom?

If you don’t already own a soundbar or home theater system and you have (or are planning to get) a larger TV, the ULTIMEA Poseidon D80 Boom is a very strong option in its price range.

It’s especially good for:

- First‑time home theater buyers who want real surround, not just “virtual surround” from a single bar  

- People who watch a lot of movies and series with Atmos or 5.1+ audio  

- Gamers (including Nintendo Switch 2 users) who want a more immersive, room‑filling sound  

- Anyone who wants a full 7.1 surround setup without paying premium brand prices or buying extra rear speaker kits later  

What you’re really getting here is a “complete package” that just works: simple setup, powerful sound, a proper surround experience, and a price that doesn’t feel greedy for what’s included.

Final Thoughts

After a week of daily use, the ULTIMEA Poseidon D80 Boom has earned a permanent spot in my home theater - at least for movies and gaming. It’s not my favorite for serious music listening, but as a budget‑friendly 7.1 Dolby Atmos system for TV and games, it delivers a lot more than I expected.

If you have any questions about the Poseidon D80 Boom, feel free to drop them in the comments. And if you want to see and hear more of it in action, don’t forget to check out the full video review embedded above.