Poor build quality!!!!! Everything was fine until the warranty expired, that is, a year later, no more sound from one speaker, because the coaxial speaker stopped making contact due to poor soldering on the woofer's board. I opened it up to see if I could fix it but there was no access to the board........Very expensive to replace with the same ones in such a short period.....Not VFM!!!!!!

I've had them for 13 years. They've been knocked around, they've worked to the max. The only thing that's happened is the crackling sound when adjusting the volume, but that can be fixed with cleaning and it's entirely my fault. In terms of sound and bass, they turn the room into a real club. They're worth their money many times over their price.

Incredible sound for their price with the right EQ, the treble seemed a bit flat to me and I boosted it quite a bit. They are very bass heavy, that's the only thing you won't miss, you can barely get rid of it. My EQ is like a soft V just with the 20-40 Hz lowered, they have a lot of those frequencies. As for volume and bass, I have both set to the middle. Speakers to get to know your neighbors :)

My best friend had them for 4 years and they are tough, so I decided to get them too

Very good sound in the morning with good intensity and bass from the subwoofer but I only had it for 2 weeks and once I tried to put it on full and immediately something broke/got damaged inside the subwoofer and now when it plays bass something metallic rattles inside. Good sound in the morning but I wouldn't recommend putting it on full and maybe for that amount of money there is something better

Powerful speakers and bass, I keep them relatively low to avoid burning out and to prevent the whole house from shaking.

Simply unbeatable.
There is no comparison to anything I had before.
Sound quality, volume (always below halfway, almost at a quarter - they are loud) and good build.
They are not plastic.
If you can buy them, don't think twice.

I will really find it hard to consult reviews for products again. I mean, people are just clueless. One of the worst tweeters available on the market. Supposedly a 200w tool and it sounds terrible. The sub is super loud and the highs are trash. The sound doesn't even blend properly. It's like listening to a ship from below and a little transistor from above. Zero body, just stay away. The Creative ones I have, which are without a sub on the other PC, have double the volume. Shame on Logitech.

They are very powerful and have strong bass but they are not durable. Even a little past half volume they start to smell and later they burn out. If you can afford it, go for something better. However, just to be clear, if you don't care about playing at maximum volume, they are an excellent choice with very strong bass even at 50%.

EDIT:
After some time, once they broke in, I can comfortably play with Volume at 90% and bass at 85% (which is basically max, there's no difference going higher) as much as I want without the risk of burning them out.

Since 2017 until today, they play continuously across the entire range of volume. Simply perfect!!!!!! Volume, sound quality, bass. I won't describe more.

They lasted me quite a few years. Very strong bass that overwhelms the sound. However, it fluctuates. It's not meant to be played at full volume. I burned them when I did. All three pieces burned out. As for the sound, I didn't really like it with the bass. For sound inside the room, it's just fine. Personally, I like to crank up the sound to make the neighborhood party! These are not for that reason. I will look to buy something stronger and with a balance of bass and treble. This one doesn't handle that well. If you don't put it at full volume, it's not a bad choice.

I have the speakers for a few days and they are very good in all aspects (for the 155 euros I bought them). However, the left speaker makes a crackling noise which I don't know where it came from and because I had them on full volume, it might be my fault and that's why I give it a 4.

It doesn't bother me or it's barely noticeable when I have them at a relatively high volume and that's very little. Because I mostly listen to trap and such, it's not annoying.

The right speaker trembles at 71hz-80hz
The left one starts from 71-170, I think

Stay away! Don't waste your money for nothing!!! I've had them for 3 years.. every month something would break. They're not worth it at all.

Excellent Sound in All Categories (Music, Games, etc.).
Very Durable.
Have them for three years with no issues at all.
Highly recommended.

They do not have unjust THX Certification, crystal clear mid and high. The bass is EXTREME. The bass knob when it is in the middle (i.e. in the default position) is indeed excessive and depending on the acoustic of each room, it can be quite noisy at specific frequencies. Logical for this "monster" of a sub it has. So with the proper placement, we are talking about ultimate sound. I hope there won't be any mishap and they will last me for years. Take them YESTERDAY.

I bought them in May 2020 for 190 euros. In September 2022, they stopped working (they didn't open at all, dead). I called the dealership in Greece and found out that they connect to the foreign dealership where a technician told me that it's probably the power supply and I should contact the store where I bought it. So I did. And there, the manager simply told me that the warranty has expired. I suggested sending it to the dealership at my own expense and he told me that it doesn't exist in Greece. I took it to electronic laboratories (3 in number) and they told me that they don't take it because it's a fixed type (if they open it, it may cause damage).
Despite the deep bass and high volume, I realize that I lost 190 euros from the marketing trap. The speakers have not worked for more than 500-600 hours in total and at a volume below 1/4. In the end, despite the good comments about sound and bass, they turned out to be USELESS. WASTED MONEY.

For their money, I expected much better. After two weeks, when you open them, they start acting up and when you adjust the volume, it's very annoying. After three months, now when I increase or decrease the volume, the situation has worsened and I can only listen to music at a constant volume. Tragic. I regret the money I spent and I wonder why others haven't experienced this with the volume lever.

For their money, without a doubt, the best 2.1 speakers for a computer. In terms of sound, the highs get lost in the mid frequencies and the bass becomes muddy and tiresome. However, with a virtual sound equalizer, combining bass reduction and treble boost, the result is surreal! Also, because many are unaware, it should be emphasized that the difference between the z623 and z625 is not only the additional connection method (optical input on the z625), but also the sound intensity (db), where the z623 outperforms, without the difference being perceptible to the average user.

It is a reliable speaker for anyone who wants something that does it all, full sound, sufficient and deep bass, at maximum volume they are incredibly loud, the sound spreads and is audible (if that makes sense), however for me, who replaced the monitor speakers I had before, the sound seems colored and saturated. For around 100 euros, it is a very good choice for me

I have them since 2014 and they still work perfectly today, when you turn up the bass and the volume, the whole house shakes. I highly recommend these speakers, without hesitation

Well, I've had these speakers for 5-6 years and I have nothing but good things to say about them, whether you connect them to the onboard sound card of the motherboard or now that I've connected them to the Creative Sound Blaster Z, they are truly the best. Crystal clear sound, amazing bass that really breaks glass, and without any issues all this time, I highly recommend them.

They have powerful sound and incredible bass for music and movies. After 1 year, they broke, I returned them, the warranty covered it and replaced them with new ones (they don't repair). After one year and three months, they have started to break again and they make interference. I do not recommend them!

Z623 Logitech: Buy today. Good and clear sound. 6.5-inch subwoofer bass... It feels like you have a 15-inch subwoofer in the room! It would be good to add a sound card later, the only downside I noticed is that:
The left speaker has a regular RCA left cable, while the right speaker has this strong thick cable that ends in a VGA driver. It has the following: Volume controlled, Bass level, and Power on/off. The connection is very simple with a small Jack to Jack cable.
It's worth the €154.90!

I have this specific product since 2015.
They were playing on a gaming pc 24/7 with music, movies, and games constantly open without any problems ever.
They were playing in the living room instead of the TV speakers with whatever one can imagine. (morning, noon, night) No problem.
They have survived 4 moves without necessarily meaning anything.
So they have very powerful and clear sound, incredible bass, and high-quality sturdy construction.
If I were to buy them again, of course, yes.
The only drawback I would mention is that they are a bit expensive, but just a little. Of course, you get what you pay for. Satisfied. They have even made the last euro.

Put the subwoofer under the desk and the speakers on top, so the sound will be good without the bass overpowering the sound.