Fosi Audio PH04 4 Channel Headphone Amplifier Stereo Audio Amp with 12V 1.5A Power Adapter Ultra-Compact Portable Headphone Splitter for Studio and Stage (PH04)

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Brand Fosi Audio
Form factor In Ear
Headphones jack 6.35 mm Jack, 3.5 mm Jack
Model name Fosi Audio PH04
Connectivity technology Wired

About this item

  • 【4 Channel Stereo Headphone Amplifier】Fosi Audio PH04 is a 4 high-power stereo amplifiers with output level control for each channel, compatible with 3.5MM headphones and 6.35MM headphones(You need a 3.5MM to 6.35MM adapter). If you're tracking more than one musician at once, or if everyone in a group wants to listen to a playback, you need a monitor distribution system. The compact, flexible PH04 can power up to four pairs of headphones and up to four independent volumes.
  • 【Upgraded Version】PH04 is designed with a power switch and 3.5MM headphone output compare with other 4 CH headphone amp. When a recording session calls for everyone's heads and ears to be in the game, the PH04 is the perfect solution and a real money-saver!
  • 【Great Sound, Great Value】The PH04 contains 4 independent stereo high-power amplifier sections that maintain the highest sonic quality even at maximum volume levels. These ultra-low-noise operational amplifiers are included for outstanding audio performance: the same op amps found in "full-size" audio equipment.
  • 【Ultra-Compact Design】A Simple Solution: Ultra-compact headphone amplifier system for studio and stage applications. Grab this super-compact amp during your sessions to power practically any headphones: four of them at the same time. To be exact, let up to 4 different people in your studio listen to the main mix while recording, and each listener can determine their own preferred volume level using the dedicated output level controls.
  • 【What You Get】 Ultra low noise headphone amplifier*1 ，12V DC power adapter *1, Use manul*1, 24-Month Warranty for Fosi Audio Headphone amplifier. Please contact with us at any times if you have any problems.

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Product Description

Fosi Audio PH04 Headphone Amplifier
Fosi Audio PH04 Headphone Amplifier

Fosi Audio PH04 Headphone Amplifier

Fosi Audio PH04 Headphone Amplifier

Fosi Audio PH04 Headphone Amplifier

4 Channel Headphone Amplifier

Fosi Audio PH04 is a 4-channel amplifier that features 4 independent stereo high-power amplifier sections with separate volume knobs for each output allowing flexible control for different headphones or speakers.

Portable and Durable Metal Exterior

Portable and durable metal exterior, providing you with a comfortable and beautiful sound experience with a metallic feel.

12V/1A Power Adapter

Equipped 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.

Fosi Audio PH04 4 Channel Headphone Amplifier Stereo Audio Amp SK01 Fosi Audio PH04 4 Channel Headphone Amplifier Stereo Audio Amp P2 T20 DS2
PH04 SK01 Q4 P2 T20 DS2
See Details
Customer Reviews
4.4 out of 5 stars
428
4.6 out of 5 stars
95
4.1 out of 5 stars
2,670
4.3 out of 5 stars
350
4.7 out of 5 stars
5
4.1 out of 5 stars
46
Type Headphone Amp Headphone Amplifier/Preamp DAC+Headphone Amp Headphone Amp +Preamp Bluetooth Tube 2.0 CH Amp DAC+Headphone Amp
MAX Power Output 40mW@100 Ohm 2400mW@32Ω(High Gain); 300mW@32Ω(Low Gain) Note: It cannot be directly connected to passive speakers, but can only be connected to active speakers or amplifiers. Note: It cannot be directly connected to passive speakers, but can only be connected to active speakers or amplifiers. 50W x 2 120mW@32 Ohm(SE); 250mW@32 Ohm(BAL)
Input 3.5mm AUX 3.5mm line in USB + Optical + Coaxial AUX + RCA Bluetooth + RCA Type C+ USB A
Output 3.5mm Headphone 3.5mm line out, 3.5mm/6.35mm headphone jack RCA + 3.5mm Headphone 3.5 mm + 6.35 mm Passive Speakers + Headphone 3.5mm Headphone+ 4.4mm Headphone
Treble & Bass Control x ✓ ✓ x ✓ x
THD - <0.001% ≤0.01% ≤0.03% ≤ 0.04% ≤ 0.0006%(SE) ≤ 0.001%(BAL)
SNR - ≥108dB ≥105dB ≥ 95db ≥ 98dB ≥108dB
Terminating Impedance 15-150 Ohm 16-300 Ohm 16-200 Ohm - 2-8 Ohm 16-300 Ohm
Power Adapter 12V - - 12V 24V/4.5A -
Work Voltage DC 12V USB-C/DC5V DC 5V AC 110V - 240V AC 110V - 240V -
Fosi Audio BT10A Bluetooth 5.0 Amplifier 100W Stereo Audio Amp Fosi Audio BT20A-S Bluetooth 5.0 Amplifier Stereo Audio Amp Receiver Fosi Audio V1.0B 2 Channel Amplifier Stereo Audio Amp Fosi Audio V1.0B 2 Channel Amplifier Stereo Audio Amp Fosi Audio M02 Subwoofer Amplifier Mono Channel Amp Fosi Audio Q4 Headphone Amplifier Mini Stereo DAC
BT10A BT20A V1.0B V1.0G M03 K5 Pro
See Details
Customer Reviews
—
4.4 out of 5 stars
7,900
4.3 out of 5 stars
722
4.3 out of 5 stars
1,106
4.2 out of 5 stars
637
4.1 out of 5 stars
605
Type Bluetooth 2.0 CH Amp Bluetooth 2.0 CH Amp 2.0 CH Amp 2.0 CH Amp Subwoofer Amp/Mono Amp DAC+Headphone Amp
MAX Power Output 50W x 2 100W x 2 50W x 2 50W x 2 200W Note: It cannot be directly connected to passive speakers, but can only be connected to active speakers or amplifiers.
Input Bluetooth + 3.5mm AUX Bluetooth + RCA RCA RCA RCA USB-C + Optical + Coaxial+3.5mm Microphone
Output Passive Speakers Passive Speakers Passive Speakers Passive Speakers Passive Speakers + Active/Passive Subwoofer RCA + 3.5mm Headphone
Treble & Bass Control ✓ ✓ x x x ✓
THD ≤ 0.04% ≤ 0.04% ≤ 0.04% ≤ 0.04% ≤0.03% <0.003%
SNR ≥ 98dB ≥ 98dB ≥ 98dB ≥ 98dB ≥106dB >110dB
Terminating Impedance 2-8 Ohm 2-8 Ohm 2-8 Ohm 2-8 Ohm 4-8 Ohm 16-300 Ohm
Power Adapter 19V/4.74A 24V/4.5A 19V/4.74A 19V/4.74A 32V/5A -
Work Voltage AC 110V - 240V AC 110V - 240V AC 110V - 240V AC 110V - 240V AC 110V - 240V USB-C/DC5V

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Fosi Audio PH04 4 Channel Headphone Amplifier Stereo Audio Amp with 12V 1.5A Power Adapter Ultra-Compact Portable Headphone Splitter for Studio and Stage (PH04)

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Customer reviews

4.4 out of 5 stars
4.4 out of 5
428 global ratings

Top reviews from Canada

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Chris
5.0 out of 5 stars High quality feeling and amazingly useful
Reviewed in Canada on May 25, 2023
Verified Purchase
Bought this to hook up to my computer and play audio to my headphones and speakers from the USB DAC. This makes it super easy to just adjust volume on each independantly without worrying about blasting the volume after a switch or having to manually switch the 3.5mm cable on the DAC.

It feels super well built, nice metal housing and volume knobs have a very sturdy feel when adjusting.

Great value overall and well worth the purchase
One person found this helpful
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Amy
5.0 out of 5 stars Clean and Loud
Reviewed in Canada on February 9, 2024
Verified Purchase
Works well. Clean withs lots of headroom. Highly recommended.
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Leonid L.
5.0 out of 5 stars Excellent amplifier!!!
Reviewed in Canada on January 28, 2024
Verified Purchase
I bought this multiple channels amplifier a long time ago and it work for me practically all the time. I had few amplifiers but this I like the most!!!
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Gregg McKay
5.0 out of 5 stars Exactly what I needed
Reviewed in Canada on December 31, 2023
Verified Purchase
one input, four outputs, easy to use, good sound and good volume. I have been using it for several months, no problems, no complaints.
One person found this helpful
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Francis Li
5.0 out of 5 stars good product
Reviewed in Canada on September 13, 2023
Verified Purchase
good product
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Charlene M.
5.0 out of 5 stars Works Great
Reviewed in Canada on January 15, 2024
Verified Purchase
Very convenient, allows me to have 4 separate things plugged in and ready to use. Like my headphones and two different sets of speakers. Definitely would recommend 😊
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Java_Entity
1.0 out of 5 stars I was disappointed
Reviewed in Canada on January 4, 2024
Verified Purchase
I was really looking forward to receiving this headphone amp but was disappointed with the result. Many issues to explain. Each headphone input made a loud POP sound while inserting the headphone, even with the power turned off. Pressing the power button also made a loud POP sound in the headphones. I disconnected the power and still experienced loud popping sounds while inserting the headphone cable so some sort of capacitor or something is retaining power while no power supply is connected, very bizarre. Each volume knob for all 4 channels made a static type sound while turning the volume up or down. Perhaps I received a lemon but I ended up returning it and getting a refund.
One person found this helpful
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Patrick Lemieux
5.0 out of 5 stars Parfait
Reviewed in Canada on February 15, 2024
Verified Purchase
Parfait
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Top reviews from other countries

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Katie
5.0 out of 5 stars An excellent headphone amp!
Reviewed in the United States on September 18, 2022
Verified Purchase
After reading generally-favorable reviews of this item, it's attractive pricing prompted me to purchase one to try. The application in this case is TV-listening, not necessarily privacy, but as a means to better follow movie dialog, which has suffered from a lack of stress on diction within recent crops of actors, and of unwarranted dominance of music and effects tracks during mixdown in post-production. Moreover, the reverberant acoustics of our rather cavernous living room also sabotage speech intelligibility.

This amp is packaged nicely; so well, in fact, that Amazon simply slapped their shipping label on the box it comes in. The amp is well protected in a custom-foam 'nest' along with its power adapter. The unit is small enough to nestle between couch cushions. Up to four watchers can share the TV audio, each with independent volume control... which is not only convenient, but necessary, as I found out.

We tried the amplifier with multiple headphones, from very pricey studio-monitor types to 'stethoscope' headsets normally associated with dictating machines. The impedance and sensitivity differences between headphones makes the individual volume controls a must. Least sensitive were my go-to Sennheiser HD414s, a good choice for TV viewing from an intelligibility standpoint, although wearing them for more than an hour might be a problem. These were early 'open-air,' 'on-ear' types, now 40 years old. The most sensitive headphones were another Sennheiser 'over-the-ear,' studio-quality ones, which block nearly all outside noise, but are again not that comfortable for extended use.

The surprise was the 'stethoscope' set, which pose no problem for wearing hours on end. The audio quality generally isn't that great with this type, but they do excel for speech intelligibility. A neat trick is to leave the normal TV speakers (or surround system) on, which will provide movie effects and music bass response while wearing this type of headset. Be sure to choose one that's "stereo" as many in this category are not (for dictating machines).

Another tip: if your headphones have a built-in volume control, operate with that control wide-open and use the amplifier's volume control to set the sound level. That will maximize the headroom margin in the system.

As for the performance of this little amp, again, it's excellent. I encountered absolutely no hum or noise attributable to the amp, action of the volume controls is smooth and wide-range, the amp generates no heat, and no problem with intermittent 3.5mm jack connections. By the way, if you are plagued with headphones or other gear that cuts-out as you wiggle those 3.5mm plugs, put a small drop of Caig DeoxIT Gold (sold on Amazon) on the plug. It keeps the connection solid for a long time, not like simply licking the plug... ugh.
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Fil Vicente
5.0 out of 5 stars Superó mis expectativas
Reviewed in Mexico on July 14, 2022
Verified Purchase
Como algo tan pequeño funciona muy bien. Superó todas mis expectativas
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Bernd Wiech
5.0 out of 5 stars Sehr Zufrieden
Reviewed in Germany on March 14, 2024
Verified Purchase
Sehr Zufrieden und schnell Geliefert.
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Jesan Thoras
5.0 out of 5 stars Very good product
Reviewed in India on December 17, 2023
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Jesan Thoras
5.0 out of 5 stars Very good product
Reviewed in India on December 17, 2023
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michele mas
5.0 out of 5 stars Bon produit
Reviewed in France on December 1, 2023
Verified Purchase
Article fidèle à nos attentes on recommande
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