It was the first subwoofer I bought with the aim of serious music listening and it pleasantly surprised me. It doesn't just add more bass, but gives body, scale, and a sense of fullness to the system. With proper adjustment, it integrates so well with the main speakers that it essentially disappears acoustically and you simply feel that the whole setup plays more completely. The app is excellent and makes the setup much easier. It was one of the most transformative additions I've ever made to my sound system.

Excellent. Very easy to use, especially with the app from your mobile, where you can essentially customize everything. Top performance and control in both music and movies. It matches perfectly with my Klipsch. Its main advantage is that it immediately gives you the confidence that it will keep up no matter how much you push it with difficult tracks and high volumes. It never, ever loses control. Highly recommended.

Replaced an 8-inch crystal audio, which was terrible...
With the SVS, my whole home cinema was transformed.
A good subwoofer makes a big difference. In action scenes, it shakes the floor, excellent.

This is a sub from SVS, which is known for its quality subwoofer constructions.

Appearance: The sub is small and quite discreet. It can fit into a living room or a room without someone saying, "What is that trunk?" Essentially, it is a cube. It comes with a grille that makes it go unnoticed, but you can remove it and see its beauty. The finish has a wood-like appearance. In the photos, its colors appear much brighter. In practice, they look minimal and aesthetically pleasing. It weighs about 11 kilograms and is made of MDF. The grille fits tightly without the possibility of causing resonances.

Sound: It is sealed. Personally, having gone through various subs, all ported and of lower price, I noticed an immediate difference: I would describe this one as melodic. It blends very beautifully and sweetly with the music, which aligns with the flat response it offers. The gentle physical feeling of pressure gives a sense of warmth, like when you are by the fireplace and it warms you up. If you want it for thumping club sounds, in a store, etc., you might not care about it being so harmonically tied and would get a different, more powerful one. There, perhaps a ported sub might have a slight advantage as you can achieve your goal with fewer watts. As you can see in the graph, it responds down to about 23Hz and then rolls off (I can hear/feel it down to 27Hz). It is important to test all the areas where you can place it. Personally, the corners did not work for me as they emphasized the 60Hz too much and I had a null at 40. You can calibrate it roughly with this (using a tone generator and sweeps from REW or even on YouTube) if you don’t want to use microphones.

Regarding movies/gaming: I have no complaints. It is definitely not a ported sub that "shouts," and I don’t mean that negatively, but as strong SPL in the ultra-deep bass (<20Hz). It is still powerful. Compared to older subs, I would call it "cinematic." In a space of about 23 square meters, I have it very low (close to -20dB from the reference level) and it has a lot more to give if I want. Unfortunately, I can't enjoy it to its full potential due to living in an apartment. It is important to place it in a spot where you don’t have nulls. In gaming, I also have no complaints. If your main activity is movies/gaming, I would suggest going for the ported version - as the sealed one, while good, sometimes leaves you craving something more impactful.

For apartment dwellers: I didn’t want to make my neighbors suffer or receive complaints. I recommend it. Mainly due to the flat response and the sealed factor, it will be a safer choice. Also, you will need to handle it with moderation, as low-frequency sounds easily pass through walls and can cause anxiety for neighbors. If you have wooden flooring, you will probably need absorption stands. When not to get it regarding noise pollution:

- If your apartment does not have basic sound insulation.
- If you are not willing to listen near-field (e.g., PC users, or a couch close to the speakers), meaning you want to be at the other end of your living room or move around the house filling the space with loud music. I don’t criticize wanting loud music, but the sub might be heard two floors below or above you.
- If you want to listen to music for many hours a day and loudly.
- If you want to listen to music but others live in your home and you haven’t discussed it beforehand.

In movies, it rarely becomes annoying because what breaks nerves is the repetitive beat over time and not the occasional explosion in a film.

APP: It frees your hands. You sit where you want and adjust the machine. This matters because the sounds change depending on your position. Therefore, you can trim the peaks with its EQ and have a smooth sound. In my opinion, it sounds nicer to the ears with increased low frequencies and as the frequencies increase, the volume of the db should decrease. In other words, a downward waveform. This also relates to the acoustic perception of sounds. Also, due to the profiles, you can have different settings for different seating positions. For example, I have different settings for when I'm at the office and another on the couch. Also one for evenings so it doesn't become annoying - just to have a discreet presence. In the photo, as you can see, it has a relatively flat response with a peak at 30hz and 60hz. With the app, you enter, set the Equalizer, and set, for example, -10db at 30hz and 60hz, and you are the masters.

EDIT mature review after some time with it:

I continue to be satisfied. I still enjoy it completely, and every time the sound supports low frequencies, I feel like a kid. It works flawlessly like the first day I got it. Reading my review, I would again draw attention to those living in apartment buildings. The low hz is incredible how it penetrates the walls. Nevertheless, I have received no complaints from the neighbors in the building, and in my inquiry, they don't hear anything (classic apartment building from the '70s) following what I wrote above. Your listening position may have a null at 30hz (meaning you hear nothing), but in the next room, there may be chaos at 30hz. In such a case, you change the position of the sub or yours (crawling until you find where to place it), if you have $$$ you get a second sub to have a more balanced sound at the cost of personal time to tune them. With one sub, it's hard not to have nulls, and you have to compromise if you're not enthusiasts.

Finally, if your room is large, or a big living room or high ceiling, check the cubic meters it supports so you won't be disappointed. Mine is about 20sqm with a high ceiling, and I run it at low db (about -20db), and near field (I am very close to the speakers/sub so I don't need to turn them up).

EDIT 2-

Immediate comparison with the pb1000 at the same spot. Aesthetically, the pb1000 is unattractive and in a small space, it overwhelms it in an unpleasant way.

It is clearly larger than the sb in all its dimensions (mini furniture). Without the grille, it looks a bit gaudy with the two front "pipes" and doesn't fit in a "serious" living room in my opinion. As for the sound, above 30hz if you closed your eyes you wouldn't notice a difference (after all, they use the same driver). Where it changes is below 30hz, where the pb is clearly stronger, down to 17hz (below 20 you don't hear it, the whole room just vibrates and creates a psychological anxiety - ideal for movies with LFE), something that will be an unpleasant experience for your neighbors and I don't recommend it in apartment buildings - unless you want to keep it low, which defeats the purpose of going for a pb. A small difference is that, in my opinion, the sb1000pro is slightly more localizable compared to the pb, possibly due to its smaller size, and has a less "expansive" sound - but not huge differences, the sound signature is exactly the same (deep, dark bass).

Regarding music: the winner is the sb1000. The difference is obvious to my ears. No matter how hard I tried, the pb remained less melodic, lacking. It's hard to explain in writing, there is a video on YouTube that compares pb/sb in music (I think the 3000) and even there, you can perceive the difference. To put it simply, the sb1000 can "touch" me emotionally, but the pb does not. A lot has been written about this on the internet, but I haven't found a definitive answer. If I hadn't heard the SB, I would have liked the PB a lot for music, it's just that the SB is S tier and the PB is A tier. The box comes with plugs for the ports, so you can convert it to sealed. I haven't tried it.

On the other hand, in movies, the difference is noticeable in the "seismic vibrations." Or more simply, at 23hz the PB shakes everything, the SB is nonexistent (it might do something if you have a small room, e.g., 2.5x4 with wooden flooring). For someone who has space and isn't bothered by the large size, wants to watch action movies, and less music, and has no neighbors, the PB is an excellent choice.

edit 3-
Since I see that my review has helped quite a few, I return 2+ years later to add that the sub works like the first day, it has shown no faults, and the app and Bluetooth work perfectly as well. Reading what I wrote above, I wouldn't say my opinion has changed significantly. The subwoofer remains unmatched in the field of music. It makes the music touch you. In movies, it is decent. For apartments, it is borderline - and requires a lot of attention, low volumes, and not boosting the nulls. For those wondering whether to get a sub or go straight to a soundbar, for movies, a ported 8" from a decent soundbar will do the job in a small to medium space. For music, you can also enjoy good speakers or headphones that can reach 55-60hz at -3db at least.