Logitech Z623 THX 2.1 Speaker System with Subwoofer, THX Certified Audio, 400 Watts Peak Power, Deep Bass, Multi Device, 3.5mm & RCA Inputs, UK Plug, PC/PS4/Xbox/DVD Player/TV/Smartphone/Tablet, Black

Only set these up today of writing, and had to write the review. Admittedly I had also just upgraded my sound card from a Creative Omni external to the awesome Creative ZxR PCIe. I was using the (again Creative) Kratos 2.1 PC speakers, but I wanted something with a little more punch to compliment the new card. I originally paid £60.00 for the Kratos S3s and to be honest they were pretty good for the money. I've had Logitech speakers previously and was never really that impressed, but these Z623s were just off the scale for the £75 paid. I was a bit concerned initially. Reviews seemed OK, and having the THX standard I was just a bit worried they would fall short for a sub £100 set of 2.1 speakers. Thankfully though, my concerns were short lived. Firstly: just unpacking them you could see and feel they were of good quality. The two satellite speakers, despite being compact, were heavy and felt sturdy. The solid volume control, bass, and power button, along with the THX logo give the speakers a real rugged look. The sub-woofer was surprisingly bigger than I thought and it really packs a punch and was also of a solid build quality. I ran a couple of THX test videos from YouTube, and the bass from this set up just knocked me over. I watched a Netflix film, played plenty of music through them, as well as ran my PS4 (Via PC optical Line-in) through them and really couldn't find much to disappoint. I'm happy to give this 5 stars across the board. For £75, they're worth every penny. I will also add that I was using these in a small environment. I dont yet know how they would fair in a large room, but for a PC speaker set up, they are just awesome.

I've owned a set of these speakers for about three days and felt I had to post a review because I love them soooo much !! I own a 27 " quadcore imac, which I love, but whilst the inbuilt speakers are OK for general low level listening, especially late at night...they are not much good for anything else (they do give a surprisingly good stereo image, but bass is non-existent and Apple really should build in something far better to preserve their image and reputation for what is already an overpriced PC !!!). I wanted sound to compliment the specs of the rest of my system. I also wanted sound that was sublime for music, films and games. As far as I'm concerned, in this tech-age, this was not a big ask. However, when I researched my wishes, I was confounded by how the reviews for each product could vary quite widely. I didn't just read the reviews on Amazon, but I also read reviews from magazines et al that were posted on the net. At least two of these reviews almost deterred me from buying the Z623s. Of course many other reviews on Amazon encouraged me to consider them strongly !!! The reviews that put me off suggested the speakers were great for TV, films and games but poorly balanced for music. However, when I noticed a market place seller on Amazon advertising this system in used condition but with a 3 month warranty at virtually a third of the Amazon price, it was a no-brainer to buy them (as everything else I considered also had at least two poor reviews also, but at a much higher price !!!). The speakers look ok-ish...I'm not a great fan of the shape of the satellites and the 'Logitech' logo on the left speaker doesn't compare to the more impressive THX logos which feature on both speakers. Apart from the shape (which could be something that only I dislike...a question of personal taste) the speakers do look expensive and substantially made. The subwoofer is not overly large, so it's ideal if space is at a premium and again its construction looks substantial and expensive. As far as performance goes, I will cover: TV, film and game performance first. Basically faultless. So many expensive flat screen TVs these days boast superb picture quality but come with absolutely pathetic speakers. If you are the owner of such a TV, add these speakers to your screen and you will be in dreamland. Similarly add them to a DVD player or games system (PS3, Xbox 360 etc) and you will be more than satisfied. Of course you may want to go for a 5.1 surround sound system (understandable as I also have one of these but downstairs with my TV) and I am only rating this system for those of you who want a 2.1 system. I wouldn't compare it with 5.1 systems, although I would suggest that you will achieve similar clout and ambience here with far less hassle (took me ages to balance my 5.1 system properly !!!) I have covered TV, film and game performance first because I have not found a review of the Z623s that in any way suggests it is a poor performer in these areas. I will now cover music performance of these speakers and in more detail, as this is the area in which some reviews have down-rated this system. Firstly, I will state that I am not an audiophile, but I am very fussy as far as sound quality of audio is concerned. The main type of music I listen to is 70s progressive rock (please don't yawn !!!!), however, my musical taste is very wide and also takes in drum n' bass, dance music (R&B + Ibiza etc etc), top 30 chart music, folk, classical and pretty much everything else except for maybe trad jazz. I listen to my music mostly from apple lossless files on itunes (created from my personal CD collection), 320 kbps mp3 files downloaded onto itunes, anything on youtube that takes my fancy, 'spotify' with high-streaming quality (and of course 'progstreaming' !!! LOL). I use the equalizer on itunes to perfect the final sound output but I do not tailor the sound from youtube or spotify (hopefully though, spotify will have an equalizer for mac soon as there is one for windows....). Music from all these sources sounds equally good... Drum n' bass, chart music, dance music of any description is again a no-brainer with this system, you will love it !!! Pleasingly for me (at least !!) prog rock also sounds superb, folk and even classical music sounds as it should with this system. I am also relieved to add that all types of music sound superb at low level as well as at loud volumes. I guess the louder volumes sound slightly better , but I am certain that would be the case with any system I listen to. The soundstage oozes quality and is incredibly well balanced, whether at high or low volume. At high volume you will make the house vibrate whether dance music or heavy metal is your vibe - easily loud enough for any serious party. At low levels you will still hear a beautifully balanced soundstage that sounds immaculate. Whilst I repeat that I'm not an audiophile, anyone who has reviewed this system as being poorly balanced with music, needs their ears washing out !!! Some have stated it sounds tinny at low volume with low bass - this is definitely not the case. I have been dipping into my music collection with renewed vigour since I have bought the Z623s, as everything sounds soooo good !!! Most tracks I listen to I want to repeat again and again, as I enjoy hearing them in this sublime Z623 rendition so much !!! I would add that it didn't take long to set up a good sound stage either. I recommend positioning the sub somewhere underneath the two satellites and more essentially make certain that the port on the sub is close to a wall. If you place the sats on your desk, the control for volume and bass level is always within reach, which is ideal, but I have anyway found that even though I flit between differing musical genres and programme sources, I rarely need to adjust things once I have decided the volume level appropriate for any particular audio session. There is an extra 3.5 input with the system and also an RCA phono input, which makes it all the more flexible. (I also use the system for recording music from guitar and keyboard into garageband on my imac - again it is great !!!) There has been a question of reliability raised with some reviews. My second-hand pair perform superbly. I will update my review immediately should any fault develop with them - so take it as read that my used pair are still working fine unless an update is added to this review !! I will conclude by saying that if you live in a flat or even a semi-d these may not be the ideal speakers as far as your neighbours are concerned !!! If you can't resist turning them up, they will disturb your neighbours badly. Whilst I live in a detached house, I have to trim the volume and bass levels when the wife is in !!! My preferred sound levels would never disturb the neighbours but they can easily resonate throughout the whole house even at modest volume levels (which annoys her !!!). That's why I'm glad to contradict the odd bad review and confirm that audio still sounds the bizzo at lower volumes, so I can listen to my Z623s in peace literally.....

These speakers are terrifyingly amazing! The quality of sound and the punch they pack, all within a moderately-sized package, is astounding. As other reviewers have pointed out, these are excruciatingly-LOUD, distortion-free speakers. 200 watts RMS is a LOT of power! Make sure the roof of your home is anchored firmly! Frequency response is fabulous, and tests in my own house with pure sine waves show these can descend to 30Hz, assuming you move around the room to find the various "sweet spots", sometimes necessary with low frequencies in smaller rooms such as mine. 20Hz is really pushing it, but I believe the THX specifications claim speaker systems bearing their logo can go down to 20Hz at -6dB, so the fall-off at such a low frequency is to be expected - but we are talking here about notes that would normally be generated only by church or cathedral organs - or synthesisers. Last night, I played, at high volume level, the earth-shattering Toccata from the "Suite Gothique" by Leon Boellmann, as performed by Daniel Chorzempa somewhere in the USA on what must be a giant pipe organ. The Logitech speakers almost blasted me from my seat! If you've never heard this track, then buy the CD, "High Tech Organ" (Philips 4266812), if only as a test piece - you won't regret it. When selecting these Logitech Z623 speakers, it was a choice between them and the Creative Gigaworks T3s, but I opted for the slightly more powerful Logitechs, and am sure I made a good choice. One good advantage the Logitechs have over the Creatives is the positioning of the bass control on the front, right-hand satellite speaker - whereas the Creatives' bass control is on the rear of the subwoofer, in a difficult place to access. I had originally thought people complaining about the Creatives' bass control placement were making a lot out of nothing, but now I really do understand the advantage of having the control right in front of you. Some recordings need the bass turning down a bit, others need it increasing, according to personal taste. For my own part, on the Logitechs, I've found having the bass control only about one-third of the way up is more than sufficient for most music. I recommend these good-looking, high-performance speakers wholeheartedly, without reservation. They are made (as in the case of the Creatives) by a company whose name can be trusted. Don't hesitate, go and buy!

Logitech 2.1 Speaker System Z623 I had to sell my Harman Kardon Soundsticks 111 speakers for my iMac due to intermittent loss of sound. I expected these Logitech speakers to sound just as good, though. So, the following review is based on these speakers being used as stand alone speakers for a computer system. Set-up was a doddle. One thing I found a little disappointing was that although there is an on/off switch, volume and bass control on the right speaker, Logitech are following the trend of missing out a corresponding treble. Trying to compensate for this by turning the bass control down, merely results in the sound becoming cheap-sounding and tinny. I thought I could make up for this using iTunes equalizer and did have partial success. But what to do if the source has no equalizer or tone controls? Somehow, I still miss the treble control. Having said that, the sound coming from the two satellite speakers is deep, rich and powerful. The volume control augments the computer's and doesn't have to be turned up too much. The specs are truly impressive: total power output of 200W RMS (with a THX label). The two main speakers have magnetic shielding and are rated at 35W. The speaker with all the controls also has a headphone stereo jack . The subwoofer is heavy and big and takes up a lot of space. At the back it has one stereo input and RCA inputs for connecting an external audio source. Its bass is profound and noticeable and both satellites delivered a fair amount of separation and mids, but I found the lack of top range frequency, i.e. treble, meant that definition, and clarity did not match my previous system. A fact that a treble control may have mitigated. In conclusion, this system is a bit of an overkill as stand alone speakers serving your computer. It favours the bass range of frequency, having a noticeable lack of crispness in the upper range of the music scale. This, together with its lack of treble control and the enormous amount of room the sub woofer occupies results in a fair four star rating. Is it as good as my previous Harman Kardon speakers? I guess so. But taking everything into consideration, including the price of these more expensive Logitech speakers, and the fact that the HK subwoofer weighs as light as a feather in comparison, I believe I would go back to the HK speakers if I had a choice. So, if you want speakers only for your computer that do not take up too much space, and you are not that bothered by having high-end specs and a heavy bass, then there are other impressive, less expensive speakers to choose from.

I have previously had an Onkyo HT-X22HDX which I sold a while back when I was short of space and was recently using some very small and thin designer style Logitech speakers that cost around 40 GBP. My cheaper Logitechs were quite impressive given how ridiculously thin the speakers were but they could be tinny and distort at times. My new Z623 speakers are very impressive and are every bit as good to my "consumer" ears as the Onkyo which cost twice the price. I use them for my PC and they are overkill for that task and won't distort at all at any volume I'd dare use when sat this close to them. I have a very large monitor and use my PC for everything from gaming to movies to TV to music. I'd say they would also be more than adequate in an average UK sized living room or bedroom for someone wanting to use them with their TV or games console and would no doubt cause huge annoyance to neighbours or parents long before they reach a volume where you would experience distortion. They are more than just "loud" if you know what I mean. There is so much more detail than on my cheaper speakers or the ones built into my 40" Samsung TV. The sound to my untrained ears is very deep and rich with a lot of crisp detail on the higher notes. This means you can kind of run them at a lower volume level and still pick out everything. Granted I am no audiophile but they sound absolutely awesome when playing games, watching movies or listening to regular music. I have a pretty good sound card in my desktop PC and to be honest you can dramatically alter the sound just playing with the settings on that so I am sure if anyone did have issues with certain aspects of the sound then it is probably something they can tweak themselves to suit their tastes. I have no concerns about the quality as my old Logitech speakers must be four years old now and have been shuffled all around the house, dumped in a carrier bag in the spare room with junk piled on top of them and even stored outside in a shed at one point but still work fine. The volume control being on the right hand speaker makes them great for PC use and to be honest the old wired remote on my previous speakers is kind of pointless as you are hardly going to drape a big thick wire across the floor. So I like these because they have less cables than those systems with a wired remote. It would be nice if they had a proper remote control as then I would recommend that everyone buy a set to use with their TV. At this price and with this sound I'd still recommend it if you don't mind getting out of your seat to adjust the volume.

I have these connect to my PC and the sound is very good, for games or music. Very punchy bass for shooting games and the like and crystal clear sound for music. Can go very loud when needed, best thing Ive bought recently that hasn't turned out to be a let down....haha.

Very Bassy (Note this is my first review) I been using these speakers over four months now and I must say these speakers are top class. The bass on these speakers are extremely heavy and you can feel the whole room shaking. When listening to bassy music you will properly hear the door hinges rattling and pictures falling off walls. To prove my point I hardly have the bass no more than 50%, that's how good this sub is. THX These speakers are not just good for bass, the Z623 is certified by THX which means 'THX Certification is a rigorous set of industry standards for audio reproduction. Essentially, it means that the sound coming out of your 5.1 surround sound or other speaker system is being heard exactly as the audio engineer intended for it to sound while he was recording and mixing it. THX stands for "Tomlinson Holman's eXperiment," and was created by Holman while he was working with Lucasfilm Studios to create a new standard for audio reproduction to ensure quality and uniformity across all theater systems intending to play their audio. Most familiar to consumers, "THX" is a method of reproducing sound that follows strict rules for creating ultra-high quality digital sound playback in surround sound audio systems. These systems can be professional theater or cinema sound systems, a simple home theater system, or a surround sound system just for your PC. Purpose of THX Certification To own a THX Certified sound system is to be positive that you are hearing optimal sound production, particularly if the DVD or video game you're playing is also THX Certified -- though that isn't a requirement for THX to make a big difference in your multimedia experience. This is because when a manufacturer achieves THX Certification, they are ensuring for their customer that their speaker system will reproduce professional quality sound exactly as the audio engineer intended for the film or video game to be heard'. THX Certified Surround Sound Systems [...] Hardware layout I notice that most 2.1 or 5.1 speakers have the volume nob and power button suppurate from the bass nob. I do admire the logitech Z623 hardware layout as it has the volume nob, power button and bass nob on one satellite speaker which is handy. Also you can plug in your headphones into the jack on the right satellite speaker and plug in your MP3 player or other device into the auxiliary jack using the included 3.5mm cable. Conclusion In conclusion these speaker have overcome my expectations and i'm very happy with this product. If you looking for a good sound system and don't want to spend a lot on them, these speakers are suited to you. I recommend these speaker to anyone who's into music, filming and gaming.

Update... 03/2014 still working perfectly, the sub woofer should be isolated from any surface with speaker spikes if possible and mount the satellites on good old blu-tack. NO REGRETS. Being a bit of a Hi-Fi nut for most of my life (i'm 38).... I'm using these on my P.C. with "soundblaster X-fi extreme" 40 quids worth of sound card. They are straight of the box today and I'm a firm believer in breaking in any set of speakers for at least a week of daily use before getting the best results. My initial experience so far has been very satisfying, and after reading the bad reviews due to various reasons I was a bit nervous when I pressed the not very firm feeling power button. On first use there a little pop and crackle but after gently working the volume dial.. there is nothing but silent operation and the dials feel firm and slick. There is no hissing or sound of any interference while operating the controls. There is also no sound imbalance at any volume. (with the exception of the very lowest point as the dial hits bottom. The sound is nice, clean and effortless with great clarity and detail even at the very lowest volumes. They capture the vocals of Katie Meluah and rip through Dr. Dre's 2001 album. I play all sorts of music, games and movies. I won't use them above 1/4 volume until I feel that they have been exercised sufficiently and that the neighbour above has gone out ! :) and as my own general rule is to play them a good 5-10 minutes before cranking them up, Addition edit: 5 weeks on, daily use.... Be aware of placing the speakers on a surface that is prone to vibration as you will lose a lot of their sound potential. This is the only real downside to these speakers.... the satellites do not prevent vibration within the cabinets and can be noisy. I have tested them with various albums but the one that shows this the most is "Tubular bells II" but perfection is not expected at this price point. After putting the sub on spikes ....the base detail is so much better now compared to the poor rubber pads that Logitech decided to use. I cannot overstate how good the subwoofer is at providing low down grunt (providing it's placed correctly according to the environment) although it's difficult to achieve the best timing... a phase control would be be good but hey!..... keep in mind what they cost.... peanuts! Looking for a 2.1 set that will blow your socks off ?.. look no further. I had an accident with one of the satellites and bought a replacement set from Logitech, i'd like to say thanks to Logitech for their awesome service. (The set I bought here from Amazon are NOT THE UK version.) the connectors are different. Logitech fixed it in a way that made my jaw drop. There may be better multimedia speakers out there but as far as I'm concerned for £123 ... these are the best, hands down! If you want better and have £200 budget and space to fit the subwoofer...... then go for the Corsair SP2500... it's that or the Z623's