Head-to-head · Best Computer Speakers with Subwoofer

Logitech Z623 vs Logitech Z906

Which is the better buy? Side-by-side on rating, price, strengths, and watch-outs — with the published ratings we averaged to get there.

The short answer

Logitech Z623 comes out ahead by a narrow margin (4.5 vs 4.4). The gap is mostly about Gamers and movie watchers who want a loud, bass-heavy THX system with multiple wired inputs at a sub-$150 price. — read the strengths below before deciding.

Higher ratedRanked #2 in Best Computer Speakers with Subwoofer

Logitech Z623

4.5

$170.99as of Jun 7

The Logitech Z623 is a THX-certified 2.1 system delivering 200W RMS with an immensely powerful side-ported subwoofer. Reviewers praise its deep, rich bass and value for games and movies, while noting the satellites lack high-end detail. With two 3.5mm inputs plus RCA, it connects three devices at once, making it a flexible, bass-forward desktop choice.

Strengths

— THX-certified 2.1 system with 200W RMS, one of few PC sets to earn THX
— Powerful side-ported subwoofer delivers deep, rich bass and real low-end rumble
— Multiple inputs (two 3.5mm plus RCA) connect three devices at once

Watch-outs

— Satellites lack high-end detail; treble can sound rolled off
— All-plastic construction is more resonance-prone than MDF rivals
— No Bluetooth connectivity

$170.99 · Check Price on Amazon Full review →

Ranked #4 in Best Computer Speakers with Subwoofer

Logitech Z906

4.4

$410.99as of Jun 7

The Logitech Z906 is a THX-certified 5.1 surround system with five satellites and a powered subwoofer, putting out 500W RMS. It decodes Dolby Digital and DTS for genuine cinematic surround and fills large rooms with deep bass. Reviewers praise its power and immersion for games and movies, while noting weaker music playback and the lack of HDMI.

Strengths

— True 5.1 surround with five satellites and a powered subwoofer
— THX certified plus Dolby Digital and DTS decoding for cinematic immersion
— 500W RMS (1000W peak) fills large rooms with powerful, room-shaking bass

Watch-outs

— No HDMI inputs, awkward with modern 4K TVs
— No HD-audio (Dolby TrueHD / DTS-HD MA) decoding
— Musical performance is weaker than its cinematic strength

$410.99 · Check Price on Amazon Full review →

How they stack up

Logitech Z623

The Z623 puts out more raw RMS power (200W) than the Klipsch ProMedia 2.1 THX and has more inputs, but its plastic satellites lack the detail of the Klipsch horn tweeters, and it has no Bluetooth like the Logitech Z407 or surround channels like the Logitech Z906.

Logitech Z906

The Z906 is the only true surround system here, adding 5.1 channels the stereo Klipsch ProMedia 2.1 THX, Logitech Z623, Logitech Z407 and Creative Pebble Plus cannot match, with far more power, though it is overkill for a simple desktop setup and lacks the Z407's Bluetooth.

Specs side-by-side

Spec	Logitech Z623	Logitech Z906
Configuration	2.1 stereo	5.1 surround
Power	400W peak / 200W RMS	1000W peak / 500W RMS
Subwoofer	7-inch side-ported, 130W	165W powered
Satellites	35W each	Five, 67W each
Inputs	Two 3.5mm, RCA, headphone jack	Optical, coaxial, RCA, 6-channel direct, 3.5mm
Controls	Volume + dedicated bass knob	—
Certification	THX	THX
Cabinet	Plastic	—
Decoding	—	Dolby Digital, DTS
Control	—	Dedicated console

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