 | 4.61 in 7.72 in  | |
| Available colors | ||
| Editiorial reviews | ||
| User rating |
 Altec Lansing VS4121 |  Logitech Z623 | |
|---|---|---|
| Number of speakers | 2.1 | 2.1 |
| Altec Lansing VS4121 | Logitech Z623 | |
|---|---|---|
| Analogue 3.5mm input (Aux) | 1 | 2 |
| Analogue 5.1/6.1/7.1 inputs | no | no |
| Analogue RCA stereo output | yes | no |
| Digital coaxial input (S/PDIF) | 0 | 0 |
| Digital optical input (S/PDIF) | 0 | no |
| Headphone output | yes | 3.5 mm |
| Microphone input | no | no |
| Pre-output (subwoofer) | no | no |
| USB | no | no |
| Docking Station for mobile/Tablet | no | no |
| Altec Lansing VS4121 | Logitech Z623 | |
|---|---|---|
| Colour of product | Black | Black |
| Altec Lansing VS4121 | Logitech Z623 | |
|---|---|---|
| Weight | 28.66 lb | 22.49 lb |
| Altec Lansing VS4121 | Logitech Z623 | |
|---|---|---|
| Built-in speaker control unit | yes | yes |
| External control unit | no | no |
| Altec Lansing VS4121 | Logitech Z623 | |
|---|---|---|
| RMS rated power | 31.0 W | 200.0 W |
| Frequency range (max) | 15000.0 Hz | 20000.0 Hz |
| Frequency range (min) | 25.0 Hz | 35.0 Hz |
| Power per channel (RMS) | 6.0 W | 35.0 W |
| Suitable for subwoofer | yes | yes |
| Surround speakers | no | no |
| Altec Lansing VS4121 | Logitech Z623 | |
|---|---|---|
| Front speaker / speaker unit | yes | yes |
| Front speaker / speaker unit height | 0.0 in | 7.72 in |
| Front speaker / speaker unit width | 0.0 in | 4.61 in |
| Front speaker / speaker unit depth | 0.0 in | 4.96 in |
| Altec Lansing VS4121 | Logitech Z623 | |
|---|---|---|
| Subwoofer height | 9.9 in | 11.18 in |
| Subwoofer width | 8.0 in | 12.01 in |
| Subwoofer depth | 13.6 in | 10.47 in |
| Subwoofer capacity | 19.0 W | 130.0 W |
| Altec Lansing VS4121 | Logitech Z623 | |
|---|---|---|
| Battery operated | no | no |
| Electric (not USB) | yes | yes |
| Pros | ||
|---|---|---|
| Cons |
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