Fosi Audio PH04 4 Channel Headphone Amplifier
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Fosi Audio PH04 4 Channel Headphone Amplifier
If you have any questions, you are always welcome to contact us. We'll get back to you as soon as possible, within 24 hours on weekdays.
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Shipping Information
We offer free worldwide shipping, except for certain regions such as Ukraine and Russia, where our services are currently unavailable.
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Customer Support
WhatsApp: +8613716612254
support@fosiaudio.com
Mon-Fri: 3:00 AM - 3:00 PM PST -
FAQ’s
If you have any questions, please refer here: FAQs
80W Toroidal Transformer
Custom pure copper toroidal transformer with up to 100W peak output ensures stable power delivery, even with three devices connected.
Nippon Chemi-Con Capacitors
Premium capacitors help minimize ripple and noise, with ripple as low as 0.1mV.
High-Reliability Rectifier
A GBU806 rectifier bridge rated at 600V/8A ensures fast, stable AC-to-DC power conversion.
4-Core Regulation
Powered by three LM1085IT and one ST78M05 linear regulators from Texas Instruments.
Product details
Description
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Share a Single Stereo Source: 4 channel amplifier features 4 independent stereo high-power amplifier sections with separate volume knobs for each of up to four outputs, which makes it possible for up to four people to monitor the mix for tracking, live uses and listen to the TV with earbuds while working out.
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For Studio and Stage Applications or more: Such an ultra-compact and portable design makes it very suitable for the studio or stage where multiple headphones are used at the same time.
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Fantastic Stereo Quality: It is a mini headphone amplifier with 3.5mm (not 6.35mm)input/output that contributes to the smoother connection of output and input, suitable for virtually all types of headphones, creating the highest Stereo audio Quality and eliminating the need for a 6.35 to 3.5mm adapter to connect the headphone power amplifier to the headphone.
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Unique Compact design with switch: It is convenient for you to turn on/off the compact headphone power amplifier with a power switch anytime and anywhere, saving energy when enjoying high stereo audio quality.
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What You G: Ultra low noise headphone amplifier*1,12V DC power adapter *1, Use manul*1, 18 Months Warranty for Fosi Audio Headphone amplifier. Please contact us at any time if you have any problems.
Specifications
| Specifications | Details |
|---|---|
| Model | PH04 |
| Input Mode | 1/8'' headphone, stereo |
| Output Mode | 1/8'' headphone, stereo |
| Input Impedance | 100 Ω |
| Output Impedance | 80 Ω |
| Max. Input level | +15dBu |
| Max. Output level | 40mW in 100 Ω |
| Device Dimension | 103 x 57 x 43MM (4.06 x 2.24 x 1.69’’) includes knobs |
| Device Weight | 175g |
| Power Supply | 12V 1.5A |
What‘s in the box？
| Item | Quantity |
|---|---|
| Fosi Audio PH04 | x 1 |
| 12V 1.5A Power Adapter | x 1 |
| User’s Manual | x 1 |
Specifications
Power Input
AC: 115V / 230V
Note:
115V setting supports 100–120V input
230V setting supports 220–240V input
Power Output
DC 1: 12V / 15V (Rated Power: 20W)
DC 2: 12V / 5V (Rated Power: 15W)
USB: 5V / 1A (Rated Power: 5W)
Operating Temperature
-20 ~ 40°C (-4°F ~ 104°F)
Temperature Rise Test
Temperature rise of 25°C (77°F) at full load
What‘s in the box？
- Fosi Audio PSU20*1
- 1.2m (47.2 in) DC-DC Power Cable*1
- 0.3m (11.8 in) DC-DC Power Cable*1
- User Manual*1
- AC Power Cord*1