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| Customization: | Available |
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| Type: | Desktop Amplifier |
| Usage: | Hi-Fi, AV, KTV System |
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| Model | USB-40D |
| Rated power | 20W |
| Case | Plastic Case; Plastic Panel; No Handle; Plastic knob |
| I/O | 1 MIC IN; 1 AUX IN; USB IN; SD IN; |
| Speaker Output | COM/4-16ohm/100V; |
| Channel | 1 Channel |
| Tune | 2 Bands Control - Treble. Bass; |
| MP3 | Bluetooth; FM Radio; Remote Controller (5 RMB); |
| Amplifier Type | CLASS D: |
| Acoustics | Frequency Response: 100Hz-16KHz; THD: <1% at 1/3 Voltage: |
| Protection | Simple Protection |
| Addition | / |
| Remark | New Class D Type; Small and light so Easy to carry; Power bigger than Class AB with similar price; More stable than Class AB Type; Sound is litte bad than Class AB; Silver/Black Optional; |
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