Logitech Speaker System Z623 Review (2.1 Channel)

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Logitech Speaker System Z623 Review (2.1 Channel)

With this review of the Logitech speaker system Z623, I wanted to cover why this awesome little 2.1 channel system manages to punch above its weight in a way, that I feel, makes it a pretty easy recommendation.

So let’s take a closer look and also see if it’s the right system for you.


Logitech Speaker System Z623 Review

The Logitech Speaker System Z623 provides powerful & clear audio quality that makes for an entertaining 2.1 channel experience. It’s a nearfield system best for the casual listener who simply wants something that’s a step up from their TV audio, without taking up the space typically required to do so.


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Design/Appearance Of The System

The first thing I noticed about the Z623 speakers and subwoofer was how nice they actually looked in person.

It was suprising, but I felt they had a subtle yet refined look about them.

Starting with the speakers, they have a pretty unusual shape; slim at the top and wider towards the bottom.

It certainly helps them stand out, going for a unique design language opposed to the typical monolithic design that’s common.

Up top is a THX logo, and in the middle is a 2.5 inch full range driver covered by a non removable metal grille.

At the bottom is the Logitech logo, and a bass & volume rocker to the right.

The satellite speakers are also two piece ABS plastic with 6 screws holding them together (4 are visible on the exterior)

What was most surprising about the speakers besides their sound, was how hefty they felt for their size.

They’re not giant speakers by any means — but taking them out the package and holding them in the hand, you’ll notice they have a certain heft to them that makes them feel more premium.

They’re not too big either at 7.7 x 4.6 x 5.0 so you won’t have to worry about placement unless you have an extremely limited area.

As for the subwoofer, it’s an all black MDF wood cabinet that looks really good.

It houses an 8 inch, stamped steel basket driver covered by a black metal grille — with a smaller port over on the side for enhanced clarity.

That’s actually pretty unusual for a pack in subwoofer because stamped steel baskets allow them to output deeper bass, and are found on more premium variants.

So to see that here is a welcome surprise.

Also the way the driver and subwoofer port are outlined by this matte plastic makes it look incredible in person honestly.

The subwoofer as far as size goes, is pretty standard fare at 11.2 x 12 x 10.5 inches meaning you’ll likely want to place it on the floor unless you have a really big desk.

From a visual perspective then, the Z623 is an attractive looking 2.1 system; with little details and flourishes that give it a unique aesthetic that works in most rooms.


Features Of The Z623

A Quality THX Certified 2.1 System

Being that this is a certified THX 2.1 system, a relatively hard standard to reach, awesome sound quality is a key focus.

400 Watt Peak/200 Watt RMS System

With a 400 watt peak and 200 watt RMS (35 watts per speaker) you can enjoy powerful sound in even large entertainment rooms.

Integrated Controls On The Speaker

Integrated controls right on the speaker make it easy to adjust your sound and bass the way you want it.

Enhanced Flexibility With RCA & 3.5 Millimeter Inputs

RCA & 3.5 millimeter inputs allow you to connect up to 3 devices; ranging from a game console, to your TV, or even a computer.

This flexibility allows you to have choice with how you listen to your content.

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How To Set Up The Z623 System

Setting up the Z623 system is relatively simple but will of course depend on what you plan on using it with.

With A TV

Being that this is an active, or self powered system, it skips the need of having to use a receiver with it.

The downside of that of course is the lack of an HDMI slot so you’ll have to use RCA cables.

So to set this system up with your display, you’ll have to plug in the left speaker with the included VGA cable into the subwoofer, and the right speaker connects into it via the included phono plug.

Then connect the red & white RCA cables into your TV from the subwoofer and you’re good to go.

With A PC

Setting up with a PC is pretty similar, but you also have the option of using the included 3.5mm jack if you chose to do so.

The Sound Quality & How It Fares

First Impressions On Sound Quality

So how does the Z623 actually sound?

Simply put, I was blown away by the audio output.

It’s one of the best 2.1 channel systems I’ve heard in a long time.

I wasn’t expecting to like it as much as I did, but the more I listened to it, the more impressed I became.

The bass output was especially impressive, and wasn’t something I was expecting having personally heard separate subwoofers prior.

The bass was hard hitting but smooth, and did so without distortion.

Sometimes with 2.1 systems, you run into the issue of distortion because there’s not enough power to handle the volume.

But this system didn’t have that issue at all.

The bass was tactile, and really made movie, music, and even gaming a lot more fun.

None of the finer details were lost in the mix, and it was able to really showcase its power when turned up.

You can definitely tell why there’s a THX certification here because when it came to the speakers, not only did they get loud, but they handled a variety of content like a champ.

Their treble seemed balanced, the mids weren’t recessed, and when combined with the sub, made for a really enjoyable experience.

A Quick Note

A little tip for you by the way — I found turning the bass knob between the 1 & 2 o clock position to be best as going below that made it feel a little mellow, while going too much past that caused output to feel boomy and inaccurate.

Your experience might vary since it depends on how they’re positioned, and the room they’re placed in, however that was the sweet spot that I found to be a good starting point to go with.

Something worth mentioning is that there’s a lack of Bluetooth support in the base model; so if that’s something important to you, the model with a Bluetooth adapter would be the one to go with.

The lack of an optical port is also an interesting omission so if that’s important to you, then the more premium model in the line, the Z625 would offer that.

Another caveat is that there isn’t an included remote, so if you use this system with your TV, you’ll have to change the volume by hand since most TVs have a fixed audio output and not a variable one.

Not a big deal but it’s something to be aware of nonetheless.

I found them to be better for nearfield and stereo usage with things like a desktop or smaller room.


Overall Thoughts

But it’s hard to personally fault for what it doesn’t have when the essence of the system, and one of the most important things, the actual sound quality, is really good.

I found them to be better for nearfield and stereo usage with things like a desktop or smaller room.

Audio quality is powerful, clear, and offers a cinematic experience that really makes you appreciate it.

If you don’t mind those things previously mentioned, then it’s a great 2.1 channel system to go with.


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  • THX level sound quality
  • Hard clean bass
  • Great for movies, music, and even gaming
  • Can adjust the amount of bass
  • Looks good


  • Proprietary connections
  • Lacks Bluetooth
  • No HDMI or optical input
  • No included RCA cables


Final Thoughts & Who It’s For

It’s a system for the casual listener who just wants something that’s a step up from the typical TV audio that listens to movies, music, and occasionally games from time to time.

It’s an amazing system for what it does, and it genuinely caught me off guard with not only its sound quality, but how powerful this little system really is.

For nearfield use with a PC, or a quality stereo experience in an average sized room, this is a great choice to go with.

If you don’t mind the caveats previously mentioned, it’s honestly a lot of fun.

The Z623 is solid, and I definitely recommend it.

Check Availability Of The Logitech Z623 2.1 Channel System




The specs of the Logitech Z623 are as follows:

Wired Connectivity

1 x Stereo RCA Input
2 x 1/8″ / 3.5 mm Input
1 x 1/8″ / 3.5 mm Output (Headphone)

Speaker System Channel Configuration


Amplifier Power Rating

Front:70 W


Bass, Power, Volume

Subwoofer Amplifier Power Rating

130 W

Physical Dimensions For Left & Right Speaker:

4.6 x 5.3 x 7.7″ / 116 x 135 x 195 mm


11.9 x 10.4 x 11.1″ / 303 x 264 x 282 mm

Weight Right Speaker:

31.7 oz / 900.0 g / 1.981 pounds

Weight Left Speaker:

29.9 oz / 850.0 g / 1.869 pounds


14.3 lb / 6.5 kg


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