Fosi Audio N2 Headphone Amplifier Portable Amp Gain & Bass Switch Audio Hi-Fi 3.5MM Earphone Headset Powered Dual-Output with Lithium Battery for iPhone, iPod, iPad, MP3 and Computers
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Our Story
Fosi Audio was founded with a simple goal: Build products that sound great and make people want to listen to music every day. We design, produce, and sell many Hi-Fi audio products on the market. We pursue your perfect music journey. Enjoy Hi-Fi music with Fosi Audio audio products NOW!
N2 Mini HiFi Headphone Amplifier
Product Parameters:
Power supply: DC 5V 1A
Internal voltage：±9.5V
Magnification (Av): GAIN=L:3 GAIN=H:6.8
Low-frequency gain（BASS=ON）: +6dB
Frequency response: 10Hz-25KHz
SNR: ＞100dB
THD+N: 0.005%
Headphone output impedance: 16-600 Ohm
Headphone output power: 16Ohm/330mW 32Ohm/320mW
64Ohm/298mW 300Ohm/100mW
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Gain & Bass SwitchThe N2 features a switch for adjusting gain as well as another switch to fine-tune bass levels. 3.5mm input/output jack. | Portable and SturdyLow-pass filter duties on the line-output are handled by the OPA1642 chip. Stream Hi-Fi music to your stereo system. | Mini Compact but Powerful2200mAH internal battery powers for up to 12 hours of use. Output remarkable sound without distortion. |
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| Battery capacity | 2200mA | – | – | – | – | – |
| Headphone Matching Impedance | 16-600 Ohm | 16-200 Ohm | 16-64 Ohm | – | – | – |
| Input Interface | 3.5MM AUX | USB, OPT, COA | Bluetooth + RCA | Bluetooth, RCA | Bluetooth, 3.5mm Aux, USB, Optical, Coaxial | Bluetooth, RCA, USB, Optical, Coaxial |
| Output Interface | 3.5MM AUX | RCA, 3.5mm Headphone Jack | RCA, 3.5mm Headphone output | Passive Speakers 50Wx2@4ohm | Passive Speakers + Active Subwoofer | Passive Speakers + Active Subwoofer |
| THD | 0.005% | ≤0.01% | ≤0.04% | – | – | – |
| Dimensions: | 17.4 x 8.1 x 2.39 cm; 168 Grams |
| Batteries Included: | 1 Lithium ion batteries required. (included) |
| Manufacture: | Fosi Audio |
| Reference: | N2 |
Not sure why the bad reviews for this amp. OneOdio A70 Bluetooth Over Ear Headphones is what I am using. I have 7 headphone amps (all under $100.00) and this amp is the best one for bass on these headphones. The amps are Brainwaves AP001, M-Audio, spider, NX1s, generic HiFi headphone amplifier, Eoteck, and unknown model soundblaster. The AP001 outperformed all of them, but the Fosi N2 is the best. I seen that youtube video of this guy saying the NX1 is better than this amp, what a punk! The The mid and high is still very clear on these even with or without the bass switch activated. The bass is still very noticeable even with out the switch activated. I think this amp is the best out there for under $100.00.
Reading the reviews I was curious if this amp was as good or better than my Fiio A5 Mont Blanc type
amp I’ve been using every day for the past six years or so, nearly, so bought one. Been putting it through
its paces the past three days, same rig, Fiio x1 media player, and Beyerdynamic Custom Studio Pro
headphones (wired), and I think this amp is a fantastic value for the money. It’s buil solidly, nice metal-ly
finish and plastic I think, or aluminum, but it feels solid, easy to use, has bass and gain boosts, and charges fast. It has at least as much power as the Fiio A5 I have, and the sound quality, if it’s not quite as subtle or great as the Fiio, is nearly as good, it’s almost the same, or close, anyway. For $50 it’s
a total steal. I wouldn’t hesitate to recommend it. The bass boost works and even without it,
on high gain, the bass was pretty tight. About the size of the Fiio amp, maybe a tiny bit smaller.
Can’t think of a reason not to recommend, if you don’t want to spend $150 or more on a Fiio
balanced-output headphone amp or don’t really need that. This amp should drive most headphones
unless it’s some ultra high impedance pair of studio phones, but it may even drive those.
Yellow, lets see I’m still currently using it still there are a few problems that have popped here and there the most annoying one is for some reason it will glitch out and you can’t here annnnything but and annoying thumping will be the only thing you hear and you immediately take the in my case using HIFI Earbuds right out cuz its so unexpected and loud AF. anyway the sound quality its really good and even turned all the why up but when turned down you do hear more of a whining sound in the background then the music just so your aware of what it does, might be asking why i still have it its cuz the weird fix is ether, its just not charged right if that makes any sense and i just leave it charging and when i come back to it its gone so its really weird but i don’t care its not bad if your getting it for the price as a “toy” but not in professional usage. ill give this a 4 out of 5 for the casual user.
I purchased a cheaper headphone amplifier in which the headphone jack eventually came loose. I actually purchased two of them and had the same problem with both, so, I decided to splurge on a more expensive amplifier option. So far the Fosi Audio N2 has exceeded expectations, as sound is clearer and smoother than the previous amplifiers I purchased. It’s more solidly built, visually looks better, and has a sturdier construction. I’m sure the N2 will last far longer and deliver a better performance for my audio needs over time.
I’ll probably get a portable power bank thats capable of 3 amp output to pair with a schiit hel 2.
This is a great little amplifier, I purchased it to power a pair of Sennheiser HD 560s and it does the job perfectly. Plenty of power at half volume, solid metal build, great volume knob, I keep the gain and bass switches on for EDM. I absolutely love it. I searched for a long time before purchasing and I’m very happy now.
I use open-back headphones to listen to my electric guitar while I practice. I have a Fender Mustang Micro mini headphone amp plugged into my guitar, and I route the output of that amp into his Fosi Audio N2 for additional amplification. The Fosi allows me to keep the volume on my Mustang Micro very low, to save its battery and reduce distortion.
Charging the device is easy, and I’m grateful that more device manufacturers are moving towards USB-C as their power standard. I’ve only used this amp for a few hours so far, but it has held its charge well, without needing to be charged additionally.
The volume knob is sturdy and has a nice feel. The switches for gain and bass are very small, but seem durable enough for their purpose. I’m not sure how much abuse the switches could handle, though, so definitely don’t let toddlers play with this amp unsupervised.
Volume is loud enough for my purposes, and I greatly appreciate the inclusion of a gain switch. I’ve played around with the bass switch a little, but don’t use it much for playing guitar. It does definitely add a little additional “ooomph” to bass lines in pop music.
Very stylish, extremely portable / versatile, and just feels cool in the hands (though a tad too slick, at times, for those of us with old man fingers!). I bought TWO of these little guys for all the little music toys I seem to be hoarding in my retirement years. Baby Boomer issues . . . . don’t get me started!
I don’t want to disturb my neighbors by listening to movies late at night through my computer speaker system. The sane alternative is to plug my Sony studio headphones into this Fosi amp to enhance sound coming directly from my computer output. I also use it with my Yamaha keyboard, which has insufficient volume through unamplified headphones. I chose this the Fosi brand based on many very favorable reviews. Now I am adding my two cents as a certified buyer.. If you are in the market for a headphone amp, this Fosi N2 is the one to get. You will not be disappointed.
eview on the Fosi Audio N2 Headphone Amplifier. I enjoy all types of music. I’ve got to a point where if I could see if I was able to see if I was able to get a better sound of my music with the portable devices that I use. They all sound okay but, I thought I would to try to see what was available with my budget. So I ordered a cheap headphone amp and was very disappointed, you get what you pay for. So I knew I would have to spend a bit more. I ordered this I set it up with my mp3 players and cd player, I was happy with it. The sound quality from this little amp was exactly what I was looking for. The ability to tweak the sound was a huge plus. I’m really glad that I purchased this unit, it took me to the next level of sound that I was looking for. Take my advice you won’t be disappointed with it. I highly recommend it, 5 stars, ease of use, it’s portability, and won’t break the budget.