Download Complete setup manual of Logitech Z623 Speakers, Speaker System for Free or View it Online on All-Guides.com. Brand: Logitech. BBK FSA-1806 Service Manual Service manual (21 pages) Tevion DHT-3105 Instruction Manual Instruction manual (8 pages) QSC MHV-1090F. Logitech Z625 computer speaker system gives you gaming grade audio and powerful sound for movies and music with THX certified 2.1 speakers and surround sound.
Build 3.0 | Sound 3.2 | DSP Sound 3.8 | score breakdown
Oh how the mighty have fallen. When THX was first introduced as a standard all of the top brands rushed to get certified by Lucasflim.One of my Kinergetics Class A amps is THX certified, the amp needed to be biased for higher output to meet the spec back in 1996.
The THX standard ended up getting spun off as a separate entity, and the blasphemers at sound card maker Creative Labs are the current owners.The standard has been watered down to a loudness spec, ability to play 85dB with 20dB peaks, so just about any ole garbage can be THX certified.
The THX standard ended up getting spun off as a separate entity, and the blasphemers at sound card maker Creative Labs are the current owners.The standard has been watered down to a loudness spec, ability to play 85dB with 20dB peaks, so just about any ole garbage can be THX certified.
Design Overview:
The Logitech z623 speakers follow the standard 2.1 satellite and subwoofer format. While it may be the standard I'm not a fan of subwoofers and this is only the second product I've reviewed that has one.
Component Overview:
Logitech Z623 Driver
Driver
Satellites use a 2.5' full range driver, and once the grill is removed the driver actually looks pretty nice. The surround is a soft butyl rubber, and instead of a dust camp or whizzer there is a nice shiny phase plug in the center of the driver.
Back of the driver shows the z623's are magnetically shielded and seem pretty well made.
Grills
Removing the grills took a bit of paper clip folding, but came off cleanly once I applied the right amount of force.Grills are a metal mesh and seem open enough to not interfere too much.
Subwoofer
The subwoofer driver is supposed to be an 8 inch, but once you remove the massive grill the driver shrinks down to a little over 7 inches across.
Stamped steel basket, big magnet, paper cone, and foam surround - looks like a pretty good driver considering the price of the system.
No vented pole piece on this driver, instead there are tiny holes in the cone behind the dust cap to vent the pressure. Spider looks generic but functional.
Cabinet/Amp/Port
The satellites are two piece ABS plastic and have 6 screws holding the two halves together. Honestly this is probably good enough because the driver is so small, and crossover point so high.
The subwoofer cabinet is 9x12x11 inches and cheap mdf, but heavier than I expected.
In comparison to the size of the box, the port on this subwoofer is massive. 2.5 inch diameter and 10 inches in length with port flares on both sides, it takes up a large amount of the box volume.
Power supply and amp boards are both built into the subwoofer. Lots of chips in there doing a bunch of stuff. I'm guessing there is some logic for switching inputs, some equalization, a crossover for the sub, and 3 channels of class D amplification.
The subwoofer cabinet is 9x12x11 inches and cheap mdf, but heavier than I expected.
In comparison to the size of the box, the port on this subwoofer is massive. 2.5 inch diameter and 10 inches in length with port flares on both sides, it takes up a large amount of the box volume.
Power supply and amp boards are both built into the subwoofer. Lots of chips in there doing a bunch of stuff. I'm guessing there is some logic for switching inputs, some equalization, a crossover for the sub, and 3 channels of class D amplification.
Inputs
The z623 speakers have two inputs, RCA and 1/8 inch headphone jack. There is no way to switch inputs and I didn't bother trying to play two sources at the same time, so I have no idea how switching is handled. Chick corea spain sheet music.
Logitech Z623 Service Manual Pdf
Controls
Right speaker has volume and bass knobs. Volume pot seems clean and I did not notice any imbalance or static while testing. Bass knob has a centering indent so you can find the default position easily. Also, there is a headphone output and an aux input on the side of this satellite.
Desktop Setup:
Satellites are very sensitive to placement. A slight toe-in and elevation with some blocks of wood make for pretty good imaging, although the sound is a bit too directional for my taste.
Listening Notes:
Bass is really heavy, turning down the knob removes a bit too much of the 300-100Hz range without cutting the 60Hz mess that is actually the problem. Just going to have to deal with the bass as is to keep the midrange balance.
Sounds like three separate speakers with the sub being crossed too high and having an obnoxiously audible cabinet resonance.
Midrange does not sound bad, maybe just a slight rising response.
The z623's are pretty awful, better than the Logitech z313 in stock form, but it's pretty bad.
Turns music into movie special effects.
Treble is spiky and headache inducing in the dog whistle range.
I've now got a massive headache from the treble. Fuck this shit, I'm done.
Sounds like three separate speakers with the sub being crossed too high and having an obnoxiously audible cabinet resonance.
Midrange does not sound bad, maybe just a slight rising response.
The z623's are pretty awful, better than the Logitech z313 in stock form, but it's pretty bad.
Turns music into movie special effects.
Treble is spiky and headache inducing in the dog whistle range.
I've now got a massive headache from the treble. Fuck this shit, I'm done.
Measurements:
These little sat sub combos are a pain to measure accurately. I've got to fight room modes in the crossover region, as well as phase cancelation and other not good things. This is a close mic of the satellites. Keep in mind with close mic the treble response is going to taper off and there is an artificial hump around the resonant frequency of the driver. Regardless of the anomalies in the measurement it's clear above 6k the little full range drivers are having a panic attack from being played too high.
For the bass response I'm using a technique I just came up with, 'kind of close ground plane measurement.' Basically to avoid floor bounce the mic goes on the floor like a traditional ground plan measurement, and to keep room modes to a minimum the mic is kept equidistant between the port and woofer 1 foot away from the corner of the sub.
For the bass response I'm using a technique I just came up with, 'kind of close ground plane measurement.' Basically to avoid floor bounce the mic goes on the floor like a traditional ground plan measurement, and to keep room modes to a minimum the mic is kept equidistant between the port and woofer 1 foot away from the corner of the sub.
DSP Correction:
Working from left to right. I cut a massive chunk of the bass, and then used that headroom to extend the bass to about 32Hz. There was a resonance of some kind coming from the subwoofer in the 600Hz range. I had to cut it, and it sounds better now. Leveled off the rising response in the midrange, and chopped the nasty cone breakup distortion above 10k.
Corrected Listening Notes:
Audiophile music sounds great on this, of course well recorded music sounds good on almost anything.
Playing M|O|O|N's Hydrogen track measures 105dB at 50Hz before the amp runs out of juice and starts distorting. This is enough to get you evicted from most apartments, more importantly, it meets the THX standard.
Trying for more, the deep bass in M|O|O|N's Release has headroom falling to about 95db at 35Hz before the subwoofer runs out of excursion.
Bass coverage is pretty even with the subwoofer close enough to kick. Too much of the subs performance feels like port noise instead of driver, but for the most part it's doing the job.
Bass guitar is audible as an instrument instead of blending in with drums.
The full range driver once corrected is actually pretty low distortion, and the amp sounds clean on this setup unless you push it too hard.
Still sounds like three speakers instead of a musical performance.
Playing M|O|O|N's Hydrogen track measures 105dB at 50Hz before the amp runs out of juice and starts distorting. This is enough to get you evicted from most apartments, more importantly, it meets the THX standard.
Trying for more, the deep bass in M|O|O|N's Release has headroom falling to about 95db at 35Hz before the subwoofer runs out of excursion.
Bass coverage is pretty even with the subwoofer close enough to kick. Too much of the subs performance feels like port noise instead of driver, but for the most part it's doing the job.
Bass guitar is audible as an instrument instead of blending in with drums.
The full range driver once corrected is actually pretty low distortion, and the amp sounds clean on this setup unless you push it too hard.
Still sounds like three speakers instead of a musical performance.
Final Thoughts:
I came in with extremely low expectations, and while the treble in stock form is unlistenable to me. The result I got out of the subwoofer with DSP is enough to give the Logitech z623 a close look in the $100 range.
The Logitech z623's are noise makers, and nothing is going to change that. There is not a lot of musicality to the speakers. To get musicality you are going to need to put up with less bass, and probably pay more money.
The Logitech z623's are noise makers, and nothing is going to change that. There is not a lot of musicality to the speakers. To get musicality you are going to need to put up with less bass, and probably pay more money.
Review Scores:
Build Quality | |
Tweeter | - |
Woofer | 3 |
Cabinet | 2 |
Features | 5 |
Crossover | 3 |
Amp | 3 |
Subwoofer | 2 |
Score | 3.0 |
Sound Quality | |
Neutrality | 3 |
Bass | 1 |
Extension | 7 |
Treble | 0 |
Midrange | 3 |
Headroom | 7 |
Dispersion | 4 |
Detail | 1 |
Imaging | 3 |
Score | 3.2 |
DSP Sound Quality | |
Neutrality | 6 |
Bass | 3 |
Extension | 7 |
Treble | 1 |
Midrange | 3 |
Headroom | 5 |
Dispersion | 4 |
Detail | 2 |
Imaging | 3 |
Score | 3.8 |
Click here to download the DSP correction for this speaker system.
Click here to buy the Logitech z623.
Check out the system finder to see what I recommend.
Click here to buy the Logitech z623.
Check out the system finder to see what I recommend.
Other content you may like:
- 9.5/10Sound Quality - 9.5/10
- 10/10Volume - 10/10
- 9/10Durability - 9/10
- 9.5/10Value For The Price - 9.5/10
Our Rating
Why Buy The Logitech Z623
The Logitech Z623 is designed for gaming, packed with loads of power and quite easily our top pick among all gaming speakers. Costing just a little over $100, this 2.1 speaker is so much more than just an average satellite and subwoofer combination. If you don’t mind the high 200-watt power requirement, the Z623 will serve you well for years to come.
Introduction
Why is it that 2.1 speaker systems tend to falter the moment you cross the 60% volume mark? It is because they aren’t suitably powered. The Logitech Z623 however, works on 200 watts of input power to ensure you never compromise on loudness and clarity. These speakers are THX certified with a deep resounding bass that rattles your bones with precision. All you have to do is plug in an AUX or your PC line IN, and you are ready to go.
THX certification is stringent, and not all speakers can achieve the high-performance standards to get one. But when a speaker does receive THX certification, it means the speakers are capable of doing much more than just gaming. With ample power, thunderous bass and performance at par with the best, these speakers bring out realism in games. Music, movies, and recordings all seem so much more studio-quality with power that just does not stop. Keep increasing the volume or the bass as you need to for an immersive audio.
The Logitech Z623 uses quick-access RCA and 3.5mm input that can take a total of three audio inputs. It also has a headphone jack if you ever need it. By the way, the subwoofer is rated at 130 watts, so go easy on the controls unless you want to shatter the peace in your neighborhood playing Battlefield.
Sale Logitech Z623 400 Watt Home Speaker System, 2.1 Speaker System - THX-certified 2.1 speaker system brings your music, movies and games to life in immersive studio-quality audio
- 400Watts of Peak/200Watts (RMS) gives you the power to listen as loud as you want to while the on-speaker controls lets you easily dial the volume and bass up or down
- RCA and 3.5mm inputs make it easy to plug in up to three audio devices - your computer, iPod, game console, DVD player and more
Our Review
What is it that you look for in a gaming speaker? For us, it is the near realistic reproduction of footsteps, vehicles approaching and ricochets. Sound effects are more vital to immersing in a game than the background score. Speakers not designed for gaming, or underpowered speakers both tend to provide a good overall feel but they do not give you that extra peripheral sensory playing games. The Logitech Z623 manages to produce a holistic feeling, somehow merging the background score with sound effects for an immersive experience.
Unboxing this speaker was a bit of a surprise. Gaming speakers usually tend to have more curves, rough edges, and design elements. The Z623 though has none of that. It does not scream gaming speakers though the subwoofer looks a lot like a powerful studio-quality product. By the way, the sub is pretty heavy so you might want to keep it on a sturdy wooden base or the floor. The cables are long enough, and that is a good thing because these speakers pack a lot of power, so you want to maintain proper separation between them.
The first time we turned the speakers on was without connecting to a PC. Instead, we tested it out with music since these are THX certified speakers. Using a FiiO player, we randomly streamed all kinds of tracks for over a couple of hours. Yes, such speakers do have a break in period, and while the Logitech Z623 sounded great during the break in period, after a couple of days it opened up, and the bass had more of an earthy feel to it than before.
During our break-in period, we also connected the speaker to our PC and gave it a whirl with a few choice titles. To test speakers, we love playing Battlefield One because spatial awareness is so crucial to dominating the online scene. Coin tosses were crystal clear including the direction. Because these speakers are great at meeting specific frequencies and directing them, you get a sense of direction from each sound. Please note, your sound card should be able to offer Sonar or some technology that plays directional sound for this to work. But, if you do have directional functionality, these speakers sound awesome.
Let’s talk about the bass of the Z623. On the first day of unboxing the speakers, when we were testing for manufacturing defects, we cranked up the volume to somewhere around three-quarters of the way. Almost immediately, our coding team came banging on our side of the office demanding to see what was causing all the ruckus. These babies are loud and shameless!
After the break in period, the volume had no effect on the sound quality. Go higher than three-quarter, and you still get the same quality and clarity every single time. Increase the bass, fiddle with the volume, nothing changes. Yes, this Logitech Speaker truly is an amazing piece of machinery designed to take your gaming experience to the next level. By the way, it lets you use a headphone directly from the speakers without needing to plug it into your PC and is more than capable of driving robust cans.
Pros
- 200 Watt is way more than any 2.1 surround speaker system will ever need.
- The bass on this Logitech speaker is not just strong and capable but also clear.
- THX certification does give the speakers higher trust value regarding longevity and durability.
- Logitech is a brand name that you can trust.
- 5mm inputs for a total of three audio devices including your computer.
- Headphone out allows you to connect any pair of cans without worrying about the power delivery or performance.
Cons
- The subwoofer is heavier than any 7.1 system subwoofer. It was probably designed for a larger speaker system.
- The overall style does not feel gaming-centric at all.
Conclusion
Logitech is a brand name you can respect regardless of the gaming peripheral. There are only a few other brands that garner our respect like Logitech does. Without a doubt, we can say that the Logitech Z623 lives up to this reputation. It isn’t just marketed as a beast it is a beast!
Small and yet powerful speakers, a large 130 Watt subwoofer with precision 2.1 surround sound effect ensures that the Z623 behaves less like a dual speaker setup and more like a 3D 7.1 speaker setup. Gaming on these babies is just incredible and playing music or watching a movie is as good as the big screen. Not only are the highs distortion free but the mids and lows are surprisingly clear too. Together with a great bass, this 2.1 speaker is easily the most adept dual speaker setup we have ever come across.
The only complaint we can have is that these speakers don’t look like PC gaming components at all, what with their ubiquitous styling.
- 9.5/10Sound Quality - 9.5/10
- 10/10Volume - 10/10
- 9/10Durability - 9/10
- 9.5/10Value For The Price - 9.5/10
Our Rating