![4 Channel Bluetooth Amplifier, 50W x 4 Audio Power Amp, Hi-Fi Home Stereo Speaker Receiver [Douk Audio M4]](https://m.media-amazon.com/images/I/316ikBMc9uL._SX342_SY445_QL70_ML2_.jpg)
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Douk Audio & Nobsound
Make Hi-Fi Affordable
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Douk Audio & Nobsound
Estabilshed in 2013, Douk Audio & Nobsound is created by a group of enthusiastic music fans and professional audio experts.
We design and make various audio equipments including amplifier, phono preamp, headphone amp, DAC, audio switch and so on.
Our aim is "Make Hi-Fi Affordable" !
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Bluetooth Mini Amplifier
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Bluetooth Digital Amplifier
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Bluetooth Tube Amplifier
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Douk Audio BS-1 Bass Shaker
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VU3 Audio Switch with VU Meter
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B1 FM Receiver
Product Description
Support Bluetooth 5.0 input for better transmission stability and quality
With a toggle to switch among Bluetooth / U-Disk / RCA inputs
4 independent volume control for each output channel
CH3 and CH4 can be switched to achieve 4-CH amplifier / multi-room music system
Packing List
- 1*M4 Amplifier
- 1*24V/4.5A Power Supply
- 1 Set*Raw Cable Speaker Jacks
- 1*Manual
Douk Audio M4
Parameters
- Channel: 2.0 / 4.0
- Bluetooth version: 5.0
- Speaker impedance: 4-8Ω
- Max output power: 50W*4 (4Ω load)
- SNR: ≥98
- Input sensitivity: 0.775V
- THD: 0.05%(1kHz 1W)
- Frequency Response: 20Hz-20KHz(±3dB)
- Working voltage: DC 12-24V
- Model: Douk Audio M4
- Audio input: Bluetooth/Stereo RCA/U-disk
- Audio output: speaker sockets
- U-disk support format: MP3, WMA, APE, FLAC, WAV...
- U-disk capacity: max 32G
- Dimensions(W*D*H): 128*134*33mm / 5.04*5.28*1.30in
- Net weight: 540g / 1.19lb
- Package weight: 1100g / 2.43lb
Panel Introduction
Using Guide
Douk Audio M4
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Douk Audio M3
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Nobsound TPA3116-5.1
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LP-269S
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Douk Audio G3
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Nobsound NS-01G PRO
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| Customer Reviews |
327
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255
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711
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| Type | Bluetooth Amplifier | Bluetooth Amplifier | Bluetooth Amplifier | Bluetooth Amplifier | Bluetooth Amplifier | Bluetooth Amplifier |
| Max Power | 50W x 4 | 50W x 2 + 100W SUB | 50W x 5 + 100W SUB | 45W x 4 | 50W x 2 | 50W x 2 |
| Channel | 2.0/4.0 | 2.1 (2.2) | 5.1 | 4.0 | 2 | 2.0 |
| Input | Bluetooth 5.0 + RCA + 3.5mm AUX + U-disk | Bluetooth 5.0 + RCA + U-disk | 3 RCA | Bluetooth + RCA + U-Disk + SD + FM | Bluetooth 5.0 + 3.5mm AUX | Bluetooth 5.0 + 3.5mm AUX + USB |
| Output | 4 Passive Speakers / 2 Passive Speakers + Another M4 Amp | Stereo Passive Speakers + Passive & Active Subwoofer | 5 Passive Speakers + Passive Subwoofer | 4 Passive Speakers | Stereo Passive Speakers | Stereo Passive Speakers |
| Tone Control | no data | ✓ | ✓ | ✓ | ✓ | no data |
| THD | ≤0.05% | ≤0.05% | ≤0.04% | ≤0.04% | ≤0.04% | ≤0.04% |
| SNR | ≥98 | ≥98 | ≥98 | ≥80 | ≥98 | ≥98 |
| Speaker Impedance | 4~8ohm | 4~8ohm | 4~8ohm | 4~8ohm | 2~8ohm | 4~8ohm |
| Power Supply | 24V 4.5A | 24V 4.5A | 19V 4.74A | 12V 5A | 19V 4.74A | 12V 5A |
Douk Audio P1
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Douk Audio X1
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Nobsound G2
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Little Bear T7
|
Little Bear MC104 PRO
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Douk Audio EleksTube
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| Customer Reviews |
978
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449
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685
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281
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273
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| Type | Bluetooth Tube Preamp & Headphone Amplifier | Bluetooth Tube MM Phono Amplifier (320W) | Subwoofer / Mono Channel Amplifier (100W) | MM Phono Vacuum Tube Preamplifier | 4(1)-IN-1(4)-OUT 3.5mm AUX Audio Switch | IPS Nixie Tube Clock |
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![4 Channel Bluetooth Amplifier, 50W x 4 Audio Power Amp, Hi-Fi Home Stereo Speaker Receiver [Douk Audio M4]](https://m.media-amazon.com/images/I/316ikBMc9uL._AC_.jpg)
