Fosi Audio Box X4 Phono Preamp & Headphone Amplifier with JAN 5654W Vacuum Tubes for MM Turntable Phonograph Preamplifier
- Regular price
- $89.99 USD
- Sale price
- $89.99 USD
- Regular price
-
$89.99 USD
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2021 NEW MODEL: The updated version for BOX X2. Next-generation phono preamp for unrivaled sound quality.
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JAN 5654W Tube MM Phono Preamplifier: The BOX X4 phono preamp supports 3.5MM AUX and MM turntable input, converting phono signals to Line Level signals with low-noise integrated circuits and high-quality components to remove low-frequency noise ensure clear sound quality. Designed with a grounding post to protect your turntable.
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Tube Headphone Amplifier & Preamplifier: The BOX X4 is designed with a 3.5MM AUX headphone and RCA output, highly useful beyond imagination.
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Applicable Vacuum Tube Model: 5654W/6K4/6J1/6J4/GE5654/6AK5/66*In vacuum tubes, etc. You can replace the vacuum tubes to DIY your stereo system. Different tubes with different sounds.
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What You Get: BOX X4 phono preamp, DC 12V power supply, user manual, our worry-free 18-month warranty, and friendly customer service.
Specifications
| Specifications | Details |
|---|---|
| Model | BOX X4 |
| Applicable headphone types | 16 Ω - 300 Ω |
| Input Mode | MM turntable + 3.5mm AUX |
| Output Mode | RCA + 3.5mm headphone output |
| Output | Active(powered) speakers, Amplifier, Headphones |
| Frequency Response | Standard RIAA |
| THD | ≤ 0.1% |
| SNR | ≥ 70dB |
| Device Dimension | 4.72 x 3.97 x 1.37 inches |
| DC Input Range | 12V |
| Input Voltage Range | AC 110V - 240V |
| Output Voltage Level | 1kHz and 650mV |
| Power Supply | 12V 1.5A |
What‘s in the box？
| Item | Quantity |
|---|---|
| BOX X4 phono preamp | x 1 |
| Vacuum Tubes | x 2 |
| DC 12V power supply | x 1 |
| User's Manual | x 1 |
Customer Reviews
This turntable (and “headphone”) preamp works very well for both of my vintage turntables (Sony PS-LX3 and Dual CS-616Q), producing clean and relatively warm sound. The bass and treble controls support fine tuning but I mostly leave them at the positions recommended by Fosi. Note that there is no center position detent. My only complaint is that it isn’t really a fully functional headphone preamp. It provides plenty of power for my Sennheiser cans but works directly only with the turntable as the audio input. If I want to listen with earphones for any other source I need to connect my Fosi ST20A PRO’s pre-out to the preamp line-in. That works okay but is needlessly kludgy.
After using this little valve pre-amp for a year now I am very impressed by its sound, build quality, and value. The device provides a wonderful warm analog valve sound that is distinctive when compared to the switchable built-in preamp of the Audio-Technica AT LT60x turntable. When plugged directly into the 3.5 in jack of a Sonos Five it creates the perfect budget analog audio setup with digital expansion capability for the future. The usefulness of physical volume and tone controls is a feature I use every day. Sometimes lo-tech is a good thing! Highly recommended.
Unfortunately I sent the the Fosi Audio Box X4 back as a return because I ordered it in error I wanted the new Fosi P3 pre amp,so, I ordered it. Since then I have received the P 3 and have it integrated into the system I have designed. Currently it is not doing very well but ,I am aware of changes/adjustments required to improve the system overall. Don't misunderstand me. I am pleased with my purchase. Adjustments need to be made.