Fosi AudioBox X4 Phono Preamp & Headphone Amplifier with JAN 5654W Vacuum Tubes for MM Turntable Phonograph Preamplifier for Record Player with Volume Bass Treble Control Hi-Fi Pre Amp

Fosi AudioBox X4 Phono Preamp & Headphone Amplifier with JAN 5654W Vacuum Tubes for MM Turntable Phonograph Preamplifier for Record Player with Volume Bass Treble Control Hi-Fi Pre Amp

Q: I have the pyle turntable and fosi audio tb10a amp but the sound is very low, so i need to add this phono preamp to amplify sound?

Yes, you need connect this phono preamp between the turntable and tb10a amp, it will amplify the sound also improve the sound quality. Thanks.

Q: Can I directly connect this phono preamp to the speakers?

If your speakers are powered speakers, you can directly connect this preamp to the speakers. But you need add an amplifier or receiver to the passive speakers. Thanks.

Q: Does this work best with Ceramic or Magnetic stylii? Can it do both?

As long as your cartridge can output a voltage between ~2.0 -5 0 millivolts, the Fosi Audio Box X4 should work. Amazon cells ceramic cartridges around $10, that I want to experiment with one. Thanks for your question.

Q: Why would an upgraded model have an snr of 70db and the older version is at 98db? seems like a downgrade. are those specs correct?

I have a feeling that either this measurement is incorrect or the previous model's measurement is wrong. There is not enough information in either measurement; how did they do it? What kind of signal was used? What frequency? Was this measured with or without a signal going into it? Was it measured while playing an actual track off vinyl, or dead wax? Did the SNR change if you engaged the EQ? Even if the previous model gave you 98dB, it's impossible to reach that measurement with vinyl — even the cleanest, best vinyl ever made while using the most expensive, best stylus, cartridge, preamp, etc. isn't going to give you anything better than ~70dB. The X4 specs state ≥ 70dB which means at the very least it will give you 70dB or above. Having said all that, I think the X4 sounds great, especially for the price!

Product ID: 561896532

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Details

Item dimensions L x W x H
10.2 x 5.1 x
Voltage
12 Volts (DC)
Manufacturer
Fosi Audio
Maximum supply voltage
12 Volts (DC)
Minimum supply voltage
12 Volts

🎧3.5mm AUX headphone output

💡Replaceable JAN 5654W vacuum tubes

🔊RCA output for versatile connectivity

Frequently Bought Together

Fosi Audio Box X4 Phono Preamp with JAN 5725W Vacuum Tubes for MM Turntable Phonograph Record Player with Volume Bass Treble Control

Monoprice 1.5ft Premium 2 RCA Plug/2 RCA Plug M/M 22AWG Cable - Black

Riverstone Audio - Tested/Matched Pair (2 Tubes) 7-Pin JAN 5654W Fully-Tested Vacuum Tubes - Upgrade for 6AK5 / 6J1 / 6J1P / EF95 - JAN 5654W Platinum Grade Pair

Description

🎶 Elevate your vinyl vibe with tube-powered precision!

NEXT GEN SOUND CLARITY - Experience pristine audio with the upgraded BOX X4 preamp, elevating your vinyl sessions to audiophile status.
PLUG PLAY CONFIDENCE - Includes DC 12V power supply and 24-month warranty—hassle-free setup and lasting support for your vinyl obsession.
CUSTOMIZABLE TUBE TONES - Swap vacuum tubes like JAN 5654W to tailor your sound signature—because your music deserves personality.
DUAL OUTPUT FLEXIBILITY - Seamlessly switch between RCA and 3.5mm headphone outputs for ultimate listening freedom.
PRECISION AUDIO CONTROLS - Fine-tune volume, bass, and treble with intuitive knobs for a perfectly balanced hi-fi experience.

The Fosi Audio Box X4 is a next-generation phono preamp and headphone amplifier featuring replaceable JAN 5654W vacuum tubes, dual RCA and 3.5mm outputs, and adjustable volume, bass, and treble controls. Designed for MM turntables, it delivers customizable, high-fidelity sound with easy setup and a 24-month warranty.

Have a Question? See What Others Asked

I have the pyle turntable and fosi audio tb10a amp but the sound is very low, so i need to add this phono preamp to amplify sound?

Can I directly connect this phono preamp to the speakers?

Does this work best with Ceramic or Magnetic stylii? Can it do both?

Why would an upgraded model have an snr of 70db and the older version is at 98db? seems like a downgrade. are those specs correct?

Reviews

A**.

Nice product

14.09.2024

A**D

Bad

It’s so bad makes the sound quality disastrous

29.03.2025

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