Fosi Audio Box X3 Bluetooth Vacuum Tube Phono Preamp
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Fosi Audio Box X3 Bluetooth Vacuum Tube Phono Preamp
If you have any questions, you are always welcome to contact us. We'll get back to you as soon as possible, within 24 hours on weekdays.
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Shipping Information
We offer free worldwide shipping, except for certain regions such as Ukraine and Russia, where our services are currently unavailable.
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Customer Support
WhatsApp: +8613716612254
support@fosiaudio.com
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FAQ’s
If you have any questions, please refer here: FAQs
Product details
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The Fosi Audio BOX X3 is a state-of-the-art phono preamp that uses Bluetooth 5.0 5725W tube technology for superior audio quality. This 2-in-1 preamp serves as both an MM turntable preamplifier and a Bluetooth 5.0 preamp, making it an essential component for the modern audiophile
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The tube phono preamp improves the audio quality of your MM turntable by converting the phono signal to a more manageable line level, resulting in better sound and increased volume levels for your home audio system
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Upgrade your home audio setup with the BOX X3 Bluetooth 5.0 tube preamplifier. With a 3.5mm line input, easily connect your latest devices for wireless Hi-Fi music streaming to powered speakers. Please note that an amplifier is required for passive speakers
- Experience exceptional sound quality with the BOX X3 phono preamp's ultra-low noise performance. Featuring 5725W vacuum tubes, this preamp produces a clean and warmer sound, allowing for perfect replication of your vinyl records' music. The built-in phono preamp circuitry is designed with high accuracy and conforms precisely to the RIAA standard, so you can enjoy a flawless listening experience every time
- What You Get: BOX X3 mm phono preamp x1, 5725W Vacuum tubes x2, Bluetooth Antenna x1, power adaptor x1, user manual x1. Please note that the BOX X3 preamplifier is a Bluetooth receiver only
Specifications
| Specifications | Details |
|---|---|
| Model | BOX X3 |
| Input Interface | RCA + 3.5MM AUX + Bluetooth |
| Output Interface | RCA output |
| Output | Active(powered) speakers, Amplifier |
| Frequency Response | Standard RIAA |
| THD | ≤ 0.1% |
| SNR | ≥ 98dB |
| Product Weight | 0.71 lb/320g |
| Device Dimension | 4.66 inch/3.85 inch/1.29 inch |
| DC Input Range | 12V |
| Input Voltage Range | AC 100V - 240V |
| Output Voltage Level | 650 mV @3mV 1kHz |
| Power Supply | 12V 1.5A |
What‘s in the box？
| Item | Quantity |
|---|---|
| Box X3 Phono Preamp | x 1 |
| 5725 Vacuum Tubes | x 2 |
| 12V 1.5A Power Adapter | x 1 |
| RCA Cable | x 1 |
| User’s Manual | x 1 |
Notice:BOX X3 is only a preamplifier, not an amplifier, can not be connected with passive speakers directly, If you need to connect BOX X3 with passive speakers, you need to connect it with an amplifier then connect the amplifier with your passive speakers.
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.