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4 Channel Headphone AmplifierFosi Audio PH04 is a 4 channel amplifier features 4 independent stereo high-power amplifier sections with separate volume knob for each output allowing flexible control for different headphones or speakers. |
Portable and Durable Metal ExteriorPortable and durable metal exterior, providing you with a comfortable and beautiful sound experience with a metallic feel. |
12V/1A Power AadapterEquipped with a 12V/1A power adapter, with overheat protection / overvoltage protection and other protection features, you do not have to worry about the use of headphone amplifiers in the process of easy to produce safety hazards. |
PH04 | Q4 | BOX X1 | BOX X2 | K5 PRO | BT30D PRO | |
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Customer Reviews |
4.4 out of 5 stars
415
|
4.4 out of 5 stars
2,638
|
4.4 out of 5 stars
3,548
|
4.4 out of 5 stars
3,548
|
4.2 out of 5 stars
539
|
4.4 out of 5 stars
554
|
Price | USD 38.05USD38.05 | USD 75.47USD75.47 | USD 43.12USD43.12 | USD 81.94USD81.94 | USD 86.25USD86.25 | USD 152.22USD152.22 |
Type | 4-Channel Headphone Amplifier | DAC+Headphone Amp | Phono Preamp | Phono Preamp with Vacumm Tubes | DAC+ Headphone Amp | Bluetooth 2.1 CH Amp |
Input | 1/8’’ Headphone Jack | USB + Optical + Coaxial | RCA | RCA+3.5mm AUX | USB-C+OPT+COA+Microphone | Bluetooth + RCA |
Output | 1/8’’ Headphone Jack | RCA + 3.5mm Headphone | Active Speakers + Headphone | Active Speakers | RCA + 3.5mm Headphone | Passive/Active Speakers+Subwoofer |
Treble & Bass Control | ✓ | ✓ | ✓ | |||
THD | - | 0.01% | ≤ 0.08% | ≤ 0.1% | <0.003% | ≤ 0.03% |
SNR | - | ≥105dB | ≥ 70dB | ≥ 98dB | >110dB | ≥ 108dB |
Terminating Impedance | 15-150Ohm | 16-200 Ohm | - | - | 16-300 Ohms | 2-8 Ohms |
Power Adapter | 12V/1A | - | 12V/1A | 12V/1A | - | 32V/5A |
Work Voltage | DC 12V-15V | DC 5V | AC 110V - 240V | AC 110V - 240V | USB-C/DC5V | AC 110V - 240V |
BT20A | BT20A-S | BT10A | BL20A | BT30D | DA2120C | |
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Customer Reviews |
4.5 out of 5 stars
8,399
|
4.5 out of 5 stars
8,399
|
4.5 out of 5 stars
4,069
|
4.5 out of 5 stars
29
|
4.4 out of 5 stars
2,760
|
4.3 out of 5 stars
620
|
Price | USD 86.25USD86.25 | USD 86.25USD86.25 | USD 63.42USD63.42 | USD 114.16USD114.16 | USD 101.47USD101.47 | USD 228.33USD228.33 |
Type | Bluetooth 2.0 CH Amp | Bluetooth 2.0 CH Amp | Bluetooth 2.0 CH Amp | Bluetooth 2.1 CH Amp with Remote Control | Bluetooth 2.1 CH Amp | Bluetooth DAC 2.1 CH Amp with Remote Control |
Input | Bluetooth + RCA | Bluetooth + RCA | Bluetooth + 3.5mm AUX | Bluetooth + 3.5mm AUX + U-disk | Bluetooth + RCA | Bluetooth 5.0 + RCA + USB + Optical + Coaxial |
Output | Passive Speakers | Passive Speakers | Passive Speakers | Passive Speakers + Active Speakers/Amplifier/Active Subwoofer | Passive Speakers+Active/Passive Subwoofer | Passive Speakers + Active Subwoofer |
Treble & Bass Control | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ |
THD | ≤ 0.04% | ≤ 0.04% | ≤ 0.04% | ≤ 0.001% | ≤ 0.04% | ≤0.01% |
SNR | ≥ 98dB | ≥ 98dB | ≥ 98dB | ≥ 92dB | ≥ 98dB | ≥110dB |
Terminating Impedance | 2-8 Ohm | 2-8 Ohm | 2-8 Ohm | 2-8 Ohm | 2-8 Ohm | 2-8 Ohm |
Power Adapter | 24V/4.5A | 24V/4.5A | 19V/4.74A | 24V/4.5A | 24V/4.5A | 32V/5A |
Work Voltage | AC 110V - 240V | AC 110V - 240V | AC 110V - 240V | AC 110V - 240V | AC 110V - 240V | AC 110V - 240V |
MAX Power Output | 100W x 2 | 100W x 2 | 50W x 2 | 100W x 2 | 50W x 2+100W | 120W x 2 |