







Fosi Audio N3 Portable Bluetooth Headphone Amplifier
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FAQ’s
If you have any questions, please refer here: FAQs
Product details
- Versatile Connectivity: Supports both Bluetooth and 3.5mm wired input. Experience high-fidelity, low-latency music anytime and anywhere. Also functions as a desktop Bluetooth receiver and amplifier, making it an ideal partner for HiFi headphones.
- User-Friendly Design: Designed with you in mind. Compact yet equipped with rich adjustment features and easy controls. Features a rotary volume wheel to prevent accidental operation and easy-to-use gain switch and bass boosting toggle.
- High Performance: Incorporates the OPA1656 op-amp, perfectly supporting headphones up to 300 Ohms impedance, ensuring clear and clean sound. Crafted by audio professionals with two decades of expertise, you're guaranteed an immersive experience where no musical detail is left behind.
- Long Battery Life: Powered by a robust 1200mAh lithium battery, the N3 promises up to 10 hours of uninterrupted audio bliss. The isolated power design further ensures consistent and pristine sound quality, letting your music play on without a hiccup.
- Exquisite Craftsmanship: Beyond its stunning looks, the CNC-machined all-aluminum alloy body guarantees durability with a premium touch. Feel the difference in every interaction and rest easy knowing you're backed by Fosi Audio's 24-month warranty.





Specifications | Details |
---|---|
Model | N3 |
Input | Bluetooth, AUX |
Output | 3.5mm Headphone Jack |
Op-Amp | OPA1656 |
Headphone Impedance | 16-300Ω |
RMS Power | 138mW @32Ω 15mW @300Ω |
SNR | 95dB |
Frequency Response | 20Hz-20kHz |
THD | 0.001% |
Bluetooth Codec | SBC |
Power Supply | 5V/1A |
Battery | 1200mAh (Up to 10-hour playback time) |
Weight | 300g |
Dimensions | 90x50x12mm |
What‘s in the box?
Fosi Audio N3 Headphone Amp x 1, Type-A to Charging Cable x 1, User’s Manual x 1
N3 User Manual
FAQs
Please read our FAQs page to find out more.
How to: Choose the right banana plug?
- Closed Screw Type. All Fosi amplifiers use standard-sized speaker terminals (4mm pins).
- Easy to wire up and solidly connect to amplifier and passive speaker.
- If they do not fit, use a little force to tighten the plugs.
- Fosi Audio Banana Plugs (Copper, Silver/Gold Plated): http://bit.ly/40Djq0U, https://bit.ly/3MkPL8t
- Please watch tutorial videos: https://youtu.be/6pYhoqDlvNw / https://youtu.be/RGvBgGAwS9k
How to Diagnose Power Supply Failure?
- The following situations may cause this issue
- Case 1: The LED on the power supply does not light up; Case 2: Amp/Preamp does not turn on; Case 3: When plugged into the Amp, both light on the amp & power supply start blinking; Case 4: Amp/Preamp make noise; Case 5: Sound shuts off by itself
- Possible solution
- Check if the power supply is illuminated when plugged into AC by itself.
Plug power supply into a different socket.
Test the adapter with a meter.
Try a different power supply (within a range of DC input).
Test the included power supply on other electrical equipment.
Please watch the tutorial video by clicking on the link provided. https://youtu.be/yCjygS03zTE
What are the differences in power outputs using the 32V and 48V power supplies?
- Using a more powerful power supply can help prevent distortion.
- Enables amplifier to drive larger, more powerful, or higher-impedance speakers.
What is a GaN?
- The GaN supply has a power output of 240W.
- Offers overload and over-temperature protection.
- The 48V 5A GaN power supply is also available on Amazon.