Fosi Audio Box X5 Phono Preamplifier

Overview

The Fosi Audio Box X5 is a high-performance phono preamplifier designed to elevate your vinyl listening experience. Compatible with both MM (Moving Magnet) and MC (Moving Coil) cartridges, it features four selectable gain levels and precise RIAA equalization to deliver detailed, dynamic, and natural sound reproduction. Built with audiophile-grade components and housed in a sleek aluminum chassis, the Box X5 combines style, performance, and reliability in one compact unit.

Key Features

• MM & MC Cartridge Compatibility
  Works seamlessly with both moving magnet and moving coil cartridges, ensuring wide compatibility with various turntables.

• Four Gain Settings (38 / 48 / 56 / 66 dB)
  Adjustable gain lets you perfectly match cartridge output levels with your amplifier input for optimal sound performance.

• High-Precision RIAA Equalization
  Ensures accurate frequency response across the spectrum, reproducing the true warmth and character of vinyl records.

• Premium Audiophile Components
  Features 2% precision polyester film capacitors, high-accuracy film resistors, OPA1612 op-amps, and gold-plated RCA connectors for ultra-low noise and distortion.

• Swappable DIP-8 Op-Amp Design
  Allows experienced users to fine-tune the sound signature by replacing the internal op-amp with different compatible models.

• Elegant Aluminum Chassis
  Compact, durable, and stylish — designed to complement any modern Hi-Fi setup.

• User-Friendly Controls
  Includes mode switch for MM/MC selection, gain control knob, grounding terminal, and a one-touch power button for ease of use.

Technical Specifications

What’s in the Box

• Fosi Audio Box X5 Phono Preamp

• 16V / 1A Power Adapter

• User Manual

Usage Tips

• Power On Sequence: Turn on your turntable first, then the Box X5, and finally your amplifier to avoid noise pops.

• Power Off Sequence: Reverse the order — amplifier off first, then Box X5, then turntable.

• Grounding: Connect your turntable’s ground wire to the X5’s grounding terminal to eliminate hum or interference.

• Gain Selection: Choose lower gain for MM cartridges and higher gain for low-output MC cartridges.

Why Choose the Box X5

The Fosi Audio Box X5 stands out for its flexibility, precision, and component quality. Unlike most preamps in its class, it supports both MM and MC cartridges and offers four gain levels for optimal system matching. The combination of high-grade components, low noise design, and customizable sound makes it a perfect choice for audiophiles who demand high fidelity from their vinyl setup.