I needed a preamp because I couldn't do what I wanted with my existing setup. I had Fluance RT-85 turntable > Onkyo TX-SV575 (25 years old) > Rockville 21-band graphic EQ via Tape 2 monitor > Wharfdale Diamond 7.2 bookshelf speakers (also 25 years old). This setup sounded great, but I also want to have the music play in other rooms in perfect synchronization. I use the Wiim streaming device for this. The issue is that with that is that the sounds lagged a noticeable few milliseconds in the other rooms. The Wiim synch feature didn't work because the source setup didn't have the signal come from the Wiim. I need to change the order of the signal chain so that the turntable signal passed through the Wiim then to the receiver. And that's why I needed a pre-amp. After a night of researching solid state and tube preamps, I decided on the Fosi Box X4. I ordered it after 3am and it arrived before 6pm that same day (nice job, Amazon!). Set up was easy. The only odd thing was that the grounding post on the X4 is spring-loaded mechanism that seems intended for bare wire or a pin rather than the spade connector that is common on turntables. So I fed one prong of th fork into the opening and that works fine. The chain is now turntable > preamp > EQ > Wiim > receiver. This works but the sound seemed a little off. especially on older records. If I spent more time adjusting the EQ, I could probably get the sound to where I want it, but I'm lazy. Then it hit me, the sound out of the preamp to the receiver should be very good, so I set the EQ to direct mode which bypasses the adjustments of the EQ. I had to up the gain on the preamp after this since the EQ was boosting the level. Voila! That did it. Everyone is right that the X4 presents a wide and immersive soundstage. All the different pieces of percussion, acoustic and electric bass, piano, guitars, and vocals are all smooth and clear. I may keep this as the regular set up bypassing the EQ, and just using the EQ on tape and CD. This is my first tube set up, so I don't think I'll be making and tube changes for now. Definitely a great product, great performance, at a great price. I recommend it.
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This item: Fosi Audio Box X4 Phono Preamp with JAN 5654W Vacuum Tubes for MM Turntable Phonograph Record Player with Volume Bass Treble Control
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- Ampapa A1 Vacuum Tube Phono Preamp, Headphone Amp, Hi-Fi Audiophile Preamplifier for MM Turntable Record Player with Tone Control for Home Stereo Audio SystemAmazon's Choicein Audio Component Preamplifiers
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Fosi Audio V3
TPA3255 Class D Home Audio Mini Speaker 2 Channel Amp 300 Watts x2
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Product Description
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, manufacture, and market many Hi-Fi audio products. We pursue your perfect music journey. Enjoy Hi-Fi music with Fosi Audio audio products!
JAN 5654W Vacuum Tube Phono Preamp/Headphone Amp
Product Parameters:
- Input Interface: MM turntable input, 3.5mm AUX input, 12V DC input
- Output Interface: RCA output, 3.5mm headphone output
- Output: Active(powered) speakers, Amplifier, Headphones
- Applicable headphone types: 16 Ω - 300 Ω
- Output Voltage Level: 1kHz and 650mV
- SNR: ≥ 70dB
- THD: ≤0.1%
- Frequency Response: Standard RIAA
- Product Adapter Input Voltage Range: AC 110V - 240V
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Experience greater control over sound quality with the independent gain rotation design for treble and bass. This feature adds more playability and fun to your music, offering more ways to enjoy and explore. |
The 3.5mm headphone output interface is compatible with standard headphones, providing dedicated functionality for headphone users. Additionally, the gain interface is specifically reserved for audiophile DIY. This preamp is designed to restore sound with greater clarity. |
Equipped with 5654 vacuum tubes, this preamp offers a smoother listening experience, replicating the natural sound and retaining classic acoustic tones in audio equipment. The result is beautiful Hi-Fi sound quality. Furthermore, the 5654 tubes can be substituted for 6K4/6J1/6J4/6AK5/66*In vacuum tubes to cater to the specific needs of audiophiles. |
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The record preamp is compatible with moving-magnet (MM) cartridges and features precise RIAA equalization for accurate audio reproduction. Its exceptional sonic performance ensures consistent quality, while low noise enhances the overall listening experience. |
This compact preamp features stereo RCA inputs and outputs, enabling you to easily connect your turntable to the preamp using the RCA inputs and ground. |
The preamp's power supply is equipped with short-circuit protection and overload protection features. It is designed to effectively reduce the impact of AC input for enhanced safety and stability. |
It's terrific
I needed a preamp because I couldn't do what I wanted with my existing setup. I had Fluance RT-85 turntable > Onkyo TX-SV575 (25 years old) > Rockville 21-band graphic EQ via Tape 2 monitor > Wharfdale Diamond 7.2 bookshelf speakers (also 25 years old). This setup sounded great, but I also want to have the music play in other rooms in perfect synchronization. I use the Wiim streaming device for this. The issue is that with that is that the sounds lagged a noticeable few milliseconds in the other rooms. The Wiim synch feature didn't work because the source setup didn't have the signal come from the Wiim. I need to change the order of the signal chain so that the turntable signal passed through the Wiim then to the receiver. And that's why I needed a pre-amp. After a night of researching solid state and tube preamps, I decided on the Fosi Box X4. I ordered it after 3am and it arrived before 6pm that same day (nice job, Amazon!). Set up was easy. The only odd thing was that the grounding post on the X4 is spring-loaded mechanism that seems intended for bare wire or a pin rather than the spade connector that is common on turntables. So I fed one prong of th fork into the opening and that works fine. The chain is now turntable > preamp > EQ > Wiim > receiver. This works but the sound seemed a little off. especially on older records. If I spent more time adjusting the EQ, I could probably get the sound to where I want it, but I'm lazy. Then it hit me, the sound out of the preamp to the receiver should be very good, so I set the EQ to direct mode which bypasses the adjustments of the EQ. I had to up the gain on the preamp after this since the EQ was boosting the level. Voila! That did it. Everyone is right that the X4 presents a wide and immersive soundstage. All the different pieces of percussion, acoustic and electric bass, piano, guitars, and vocals are all smooth and clear. I may keep this as the regular set up bypassing the EQ, and just using the EQ on tape and CD. This is my first tube set up, so I don't think I'll be making and tube changes for now. Definitely a great product, great performance, at a great price. I recommend it.
Top reviews from the United States
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Reviewed in the United States on July 27, 2023
I needed a preamp because I couldn't do what I wanted with my existing setup. I had Fluance RT-85 turntable > Onkyo TX-SV575 (25 years old) > Rockville 21-band graphic EQ via Tape 2 monitor > Wharfdale Diamond 7.2 bookshelf speakers (also 25 years old). This setup sounded great, but I also want to have the music play in other rooms in perfect synchronization. I use the Wiim streaming device for this. The issue is that with that is that the sounds lagged a noticeable few milliseconds in the other rooms. The Wiim synch feature didn't work because the source setup didn't have the signal come from the Wiim. I need to change the order of the signal chain so that the turntable signal passed through the Wiim then to the receiver. And that's why I needed a pre-amp. After a night of researching solid state and tube preamps, I decided on the Fosi Box X4. I ordered it after 3am and it arrived before 6pm that same day (nice job, Amazon!). Set up was easy. The only odd thing was that the grounding post on the X4 is spring-loaded mechanism that seems intended for bare wire or a pin rather than the spade connector that is common on turntables. So I fed one prong of th fork into the opening and that works fine. The chain is now turntable > preamp > EQ > Wiim > receiver. This works but the sound seemed a little off. especially on older records. If I spent more time adjusting the EQ, I could probably get the sound to where I want it, but I'm lazy. Then it hit me, the sound out of the preamp to the receiver should be very good, so I set the EQ to direct mode which bypasses the adjustments of the EQ. I had to up the gain on the preamp after this since the EQ was boosting the level. Voila! That did it. Everyone is right that the X4 presents a wide and immersive soundstage. All the different pieces of percussion, acoustic and electric bass, piano, guitars, and vocals are all smooth and clear. I may keep this as the regular set up bypassing the EQ, and just using the EQ on tape and CD. This is my first tube set up, so I don't think I'll be making and tube changes for now. Definitely a great product, great performance, at a great price. I recommend it.
Images in this review
Reviewed in the United States on May 20, 2023
It came with 2 GE 5654W tubes. They are a very nice tubes and actually cost about $15 each, so that’s $30 of the value right there. One of the tubes had a slight bend in the pin that I had to bend straight to get it to fit in the preamp socket (typical problem with tubes…they are delicate). It has red LEDs that light up the tubes that make it look cool. The unit itself is built like a tank (solid metal casing). Attaching my record player to the preamp was simple and the sound quality is amazing! The sound using these tubes is rich and detailed and being able to adjust the bass and treble really lets me dial in the sound for different speakers. If you plug an aux cord into the unit, the phono preamp turns off and defaults to the aux input (gotta pull out aux and then the phono preamp comes back on).
Overall I’m amazed at how good of a phono preamp this is for the money. The headphone and aux input preamp are just icing on the cake. Love this X4 phono preamp!!!
Fantastic Phono Preamp with Headphone Output Too!
Reviewed in the United States on May 20, 2023
It's a unique combination of tube phono preamp, component preamp + headphone amp and for the price it's ridiculously good value. My current amp has no headphone jack and with the X4, I now have the option to listen to vinyl with my headphones. It has plenty of power to drive my headphones to extremely loud levels. This preamp has bass and treble controls that allow me to adjust the sound heard through the headphones as well as the speakers - I never seen this feature on a phono preamp and love it.Reviewed in the United States on May 20, 2023
It came with 2 GE 5654W tubes. They are a very nice tubes and actually cost about $15 each, so that’s $30 of the value right there. One of the tubes had a slight bend in the pin that I had to bend straight to get it to fit in the preamp socket (typical problem with tubes…they are delicate). It has red LEDs that light up the tubes that make it look cool. The unit itself is built like a tank (solid metal casing). Attaching my record player to the preamp was simple and the sound quality is amazing! The sound using these tubes is rich and detailed and being able to adjust the bass and treble really lets me dial in the sound for different speakers. If you plug an aux cord into the unit, the phono preamp turns off and defaults to the aux input (gotta pull out aux and then the phono preamp comes back on).
Overall I’m amazed at how good of a phono preamp this is for the money. The headphone and aux input preamp are just icing on the cake. Love this X4 phono preamp!!!
Images in this review
Reviewed in the United States on July 12, 2024
Reviewed in the United States on December 6, 2023
Top reviews from other countries
christian sery
Fosi Audio X4 Préamplificateur Phono
Reviewed in France on August 23, 2024