Fosi Audio PH04 4-CH Headphone Amplifier User Manual

Fosi Audio PH04 4-CH Headphone Amplifier

Product specifications

The PH04 is an ultra-compact 4-channel headphone amplifier and 1 to 4 audio splitter, designed for all types of headphones and offering maximum applicability which comes with four 3.5mm 1/8 outputs and one 3.5mm 1/8 input and four volume knobs to control the volume separately, the integrated s JRC4580 op-amp chips leave no audio detail untouched and ultra-low noise to ensure the excellent audio performance.

2.24 x 1.69 includes knobs
Net Weight:| 175g
Applicable Headphones| 15-lS0ohm

Package contents

• Fosl Audio PH04
• 12V Power Adapter
• User Manual 1

Product overview & control functions

Power Supply

Connect the 12V power adapter with your PH04 and then press the power switch to turn it on.

Note
Before connecting the power supply, please turn down the volume control to zero to avoid your hearing or your headphone from damage.)

Power Indicator Light

Press the power switch to turn on/off the PH04.  Note when the power supply Is correctly connected and the switch is pressed, the power indicator light stays on red.

Output and Input

Connect up to 4 headphones directly to the 4 outputs of PH04 which are all 1/8 output ports  there is no need for an additional 1/4″ to 1/8″ cable to connect headphones and earphones Connect the signal source to the 1/8 input port.

Volume Control

Adjust the volume separately with four separate volume knob.

Note
Please ensure that the volume is turned down to all the way to the left before turning on to avoid your headphones and hearing from damage due to too high volume.

Quick setup

Step 1

Prepare a PH04; a phone; a 1/8 male to 1/8 male audio cable; a pair of headphones.

Step 2

Connect the PH04 to the power adapter and switch it on the indicator light stays on red.

Step 3

Connect the phone’s audio output and the PH04’s audio input via a 1/8 to 1/8 audio cable.

Step 4

Connect headphones to the audio output

Step 5

The phone plays audio and you will get the listening enjoyment.

Troubleshooting/QA

Q: I can’t get 4 inputs to 1 output?
A: The device is designed for 1 input and 4 outputs, and do not support multiple device audio inputs.

Q: I can’t get mic sound input?
A: The PH04 does not have a chip that can parse mic sound and does not support mic input.

Q: Get a pop sound when using the power switch?
A: A short pop when the power is switched, so please remove the audio equipment in advance.

Q: No sound output on one side?
A: Please check all 4 outputs audio, if all outputs are on one side, please make sure the input device and 1/8″ male plug is not a mono Input. If only 1 output interface is faulty, please contact after-sales for replacement.

Q: How do I power this device?
A: Please use the supplied 12V power adapter to power the device, if you are using the car/battery power, please make sure the device power does not exceed lSV

Warranty Information
All Fosi Audio products have an 18-month limited warranty on parts and labor from the date of purchase. Please contact us if you have any problems.

About Fosi Audio

Fosi Audio designs and builds innovative audio products with all your music In mind. Creat sound, simple but elegant designs, high-quality materials, and truly useful features are what Fosl Audio Is about. We sincerely hope you get as much enjoyment from our products as we’ve had to create them.
Our website: www.fosiaudio.com
Amazon store: www.amazon.com/fosiaudio
Our Youtube channel: Fosi Audio
Our Facebook page: Fosi Audio
WhatsApp: +86 17722625601

After-sale Service and Technical Support
Email: customer@fosiaudioshop.com fosiaudio@hotmail.com

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Documents / Resources

| Fosi Audio PH04 4-CH Headphone Amplifier [pdf] User Manual
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