Fosi Audio T20X Amplifier
User Manual
Introduction
The Fosi Audio T20X is a compact, high-fidelity stereo amplifier designed to deliver exceptional audio performance for your home audio systems. It combines advanced digital amplification technology with a user-friendly interface and versatile connectivity options.
Key Features
- High-fidelity stereo sound output
- Advanced digital amplifier chip for clear audio reproduction
- Multiple input options: RCA, AUX, and Bluetooth 5.0
- Bass and treble control for personalized sound tuning
- Compact and elegant design to fit any space
- Includes a Bluetooth antenna for enhanced wireless range
Package Contents
- Fosi Audio T20X Amplifier unit
- Power Adapter
- Power Cord
- User Manual
- Bluetooth Antenna
Specifications
| Parameter | Details |
|---|---|
| Model | T20X |
| Output Power | 50W x 2 @ 4Ω |
| Total Harmonic Distortion (THD) | ≤ 0.04% |
| Signal-to-Noise Ratio (SNR) | ≥ 100dB |
| Frequency Response | 20Hz - 20kHz (±1dB) |
| Input Modes | RCA, AUX, Bluetooth |
| Power Supply | DC 24V |
| Supported Speaker Impedance | 4Ω - 8Ω |
| Dimensions (W x D x H) | 110mm x 90mm x 32mm |
| Net Weight | 250g |
Operation
Setup and Connections
Follow these steps to set up your Fosi Audio T20X amplifier:
- Attach the provided Bluetooth antenna to the amplifier's antenna port for optimal wireless reception.
- Connect your passive speakers to the amplifier's speaker terminals using appropriate speaker wire. Ensure correct polarity (+ to + and - to -) is maintained for both channels.
- Connect the included power adapter to the DC input jack on the rear of the amplifier.
- Plug the power adapter into a standard wall electrical outlet.
- Connect your audio sources, such as a CD player, turntable, or smartphone, to the amplifier using RCA or AUX cables.
Controls and Functions
Familiarize yourself with the amplifier's controls:
- Power Button: Press this button to turn the amplifier on or off. The indicator light will illuminate when powered on.
- Volume Knob: Rotate the knob clockwise to increase the volume and counter-clockwise to decrease it.
- Bass Knob: Adjust the low-frequency response (bass) of the audio output.
- Treble Knob: Adjust the high-frequency response (treble) of the audio output.
- Input Selector Button: Press this button to cycle through the available input modes: RCA, AUX, and Bluetooth. The currently selected input may be indicated by an LED or on-screen display (if applicable).
- Bluetooth Pairing: When the Bluetooth input is selected, the amplifier automatically enters pairing mode. On your Bluetooth-enabled device (smartphone, tablet, computer), search for available devices and select "Fosi Audio T20X" to connect.
Troubleshooting Guide
| Problem | Possible Cause | Solution |
|---|---|---|
| No Sound Output | Unit is not powered on. | Ensure the power adapter is connected and plugged in. Check the power button. |
| Volume is set to minimum. | Increase the volume using the volume knob. | |
| Incorrect input selected. | Press the input selector button to cycle through inputs until the correct one is active. | |
| Speaker wires are disconnected or incorrectly connected. | Check all speaker wire connections at both the amplifier and speaker ends. Ensure correct polarity. | |
| Audio source is not outputting sound. | Verify the audio source device is functioning correctly and has its volume turned up. | |
| Distorted or Unclear Sound | Volume is set too high. | Reduce the volume level. |
| Speaker impedance is too low or too high. | Ensure your speakers' impedance is within the 4Ω - 8Ω range supported by the T20X. | |
| Poor quality audio source. | Try a different audio source or file. | |
| Bluetooth Connection Issues | Amplifier is not in Bluetooth mode. | Select the Bluetooth input. |
| Device is too far from the amplifier. | Move your Bluetooth device closer to the T20X. Ensure the antenna is properly connected. | |
| Previous Bluetooth connection is active. | Disconnect from other devices and try re-pairing. Turn off Bluetooth on other nearby devices. |
Important Safety Information
- Water and Moisture: Do not expose the amplifier to rain, water, or operate it in damp or wet locations.
- Power Source: Only use the power adapter supplied with the unit. Using an incorrect adapter may damage the device or pose a safety risk.
- Ventilation: Ensure adequate ventilation around the amplifier. Do not block any ventilation openings.
- Servicing: Do not attempt to open or service the amplifier yourself. Refer all servicing to qualified personnel.
- Heat: Avoid placing the unit near heat sources such as radiators, heat registers, or other appliances that produce heat.
