Fosi Audio PH05
- Fosi Audio
Fosi Audio PH05
- Fosi Audio
$49.90
- Authorized Dealer · Tech Support · 30-Day Returns
Why it stands out
Best for
Not ideal for
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Setup guide
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What you should know
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Frequently asked questions
View full technical specifications
Official product information provided by Fosi Audio
The following product descriptions, specifications and images are provided by the manufacturer.
Fosi Audio PH05 is a one-input, five-output headphone distribution amplifier for sharing one stereo source with up to five listeners.
Five independently adjustable 310mW channels, master volume and one-touch mute make it useful for group listening, teaching, podcasting and headphone comparison.
Why it stands out
Five independent headphone channels
Each 3.5mm output has its own level control for different listeners and headphone sensitivities.
310mW per channel
All five outputs provide rated power of 310mW at 32Ω for 16–300Ω headphones.
Master control and instant mute
A large master volume knob and one-touch mute simplify group control.
Low-noise distribution design
NE5532 amplification, 105dB SNR and 0.001% THD preserve a clean shared signal.
Best for
- Group listening sessions
- Studio or podcast headphone monitoring
- Teaching and language labs
- Comparing several headphones from one source
Not ideal for
- Combining several sources into one output
- Headsets requiring microphone pass-through
- Passive speakers or speaker-level amplification
EMiUZEK Buying Notes
- PH05 is one input to five outputs; it cannot work in reverse as a five-input mixer.
- All outputs are stereo 3.5mm headphone connections and do not carry microphone signals.
- Set master and channel volumes low before connecting headphones.
Frequently asked questions
Can it accept five sources?
No. PH05 distributes one stereo input to five headphone outputs.
Can each listener set a different volume?
Yes. Each output has an independent level control.
Does it support headset microphones?
No. It carries stereo playback audio only.
Can it drive passive speakers?
No. It is a headphone amplifier, not a speaker power amplifier.
What headphones are supported?
Fosi specifies 16–300Ω headphones.
Can all five outputs be muted together?
Yes. Use the one-touch mute function.
HOW TO CONNECT
Group listening
Source: Phone, DAC, mixer or audio interface
Connection: 3.5mm AUX
Output: Five 3.5mm outputs
Target: Up to five headphones
Note: Start with all channel levels low.
Studio monitoring
Source: Mixer or audio interface
Connection: 3.5mm stereo line
Output: Five headphone outputs
Target: Performers or reviewers
Note: Use independent controls for each listener.
Headphone comparison
Source: Single DAC or player
Connection: 3.5mm AUX
Output: Selected headphone outputs
Target: Multiple headphones
Note: Level-match carefully before comparing.
Technical Specifications
Audio performance
| Feature | Specification |
|---|---|
| Rated output | 310mW × 5 at 32Ω |
| Headphone impedance | 16–300Ω |
| SNR / Dynamic range | 105dB / 105dB |
| THD | 0.001% |
| SINAD / Crosstalk | 90dB / 90dB |
| Frequency response | 20Hz–20kHz (±0.5dB) |
Connections and power
| Feature | Specification |
|---|---|
| Input | 3.5mm AUX × 1 |
| Outputs | 3.5mm headphone × 5 |
| Op-amp | TI NE5532 |
| Power | DC 12V / 1A |
Recommended System Setup
| Setup | Connection |
|---|---|
| Group session | Source → PH05 → Up to five headphones |
| Studio | Audio interface → PH05 → Performers' headphones |
| Comparison | DAC → PH05 → Multiple headphones |
Additional Product Content
Fosi Audio product comparison
Compare the models by the differences that most affect system matching and everyday use.
| Feature | PH05 | PH04 |
|---|---|---|
| Product position | Five-channel headphone distributor | Four-channel headphone distributor |
| Inputs | 1 × 3.5mm stereo | 1 × 3.5mm stereo |
| Headphone outputs | 5 × 3.5mm | 4 × 3.5mm |
| Independent volume | Five channels | Four channels |
| Output power | 310mW per channel at 32Ω | 40mW at 100Ω |
| Supported impedance | 16–300Ω | Application dependent |
| Master volume | Yes | Yes |
| One-touch mute | Yes | No |
| Microphone support | No | No |
| Best use | Five-listener monitoring | Basic four-listener distribution |
What's in the box, manuals and downloads
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