Fosi Audio Box X2 MM Turntable Phono Preamplifier
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Fosi Audio Box X2 MM Turntable Phono Preamplifier
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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Tube MM Phono Preamplifier: This Fosi Audio phono preamplifier removes low-frequency noise and ensures clear sound quality by converting phono signals to line-level signals using high-quality components and low-noise integrated circuits. It is designed to safeguard your turntable thanks to its grounding post
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3 Switchable Gain Modes: You can switch between 3 modes: 39, 42, or 45 dB. High compatibility and customizable control are provided by the adjustable gain levels. Also, it has very good circuitry and entry-level, high-end analog sound
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Tube Preamplifier: With a 3.5mm AUX input, it's also a tube preamp. Fosi Audio used high-quality component parts for the design and assemblage of this phono preamplifier. You can enjoy a very warm and smooth sound
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Applicable Vacuum Tube Model: The compatible vacuum tube models are 6K4, 6J1, 6J4, GE5654, 6AK5, 66, etc. To make changes to your stereo system yourself, simply swap out the vacuum tubes. Consider that distinct tubes produce various sounds
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Package Content: You will get 1 x Box X2 phono preamp, 2 x vacuum tubes, 1 x RCA cable, 1 x power adaptor, and 1 x user manual
Specifications
| Specifications | Details |
|---|---|
| Model | BOX X2 |
| Input Mode | RCA+3.5mm AUX |
| Output Mode | Active Speakers |
| Frequency Response | Standard RIAA |
| THD | ≤ 0.1% |
| SNR | ≥ 98dB |
| Product Weight | 0.66 lb/300g |
| Device Dimension | 4.66 inch/3.85 inch/1.29 inch |
| DC Input Range | 12V |
| Input Voltage Range | AC 110V - 240V |
| Output Voltage Level | 600 Mv @3mV 1kHz |
| Power Supply | 12V 1.5A |
What‘s in the box？
| Item | Quantity |
|---|---|
| Box X2 Phono Preamp | x 1 |
| Vacuum Tubes | x 2 |
| 12V 1.5A Power Adapter | x 1 |
| RCA Cable | x 1 |
| User’s Manual | x 1 |
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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.
It is an awesome preamp. I'm very happy with it!
It really transform the sound of your vinyl, its warmer with more stage presence.
It's still early... ask me after a month or six months of use. But after a few listens, I'm very happy with the preamp. This was an upgrade from my previous one. Now I need to upgrade the rest of my system.
There are but a few things that are able to put a permanent grin on my face, here’s one of them. So far, every Fosi product I bought exceeded my expectations, this time is no exception. The Fosi tube phono pre amplifier really gives my sl-2000 that extra sweetness that takes me back a “couple” of decades. You guys are like lego’s for big kids!
I have a riaa (transistor) in the same pricerange. Then I got this recommended, bought it and tested. There was no comparison from the transistor riaa to this tube riaa. The tube riaa sounds way better. Well done Fosi. Keep this price and you got a winner.