Fosi Audio BT20A Pro & T20X AmpManual de instrucciones del lifier

1. Introducción

This manual provides detailed instructions for the Fosi Audio BT20A Pro Bluetooth 5.0 Amplifier and the Fosi Audio T20X Bluetooth Tube Stereo Amplifier. It covers essential information for setup, operation, maintenance, and troubleshooting to ensure optimal performance and longevity of your audio equipment.

2. Producto terminadoview

2.1 Fosi Audio BT20A Pro Bluetooth 5.0 Ampmás vivaz

The Fosi Audio BT20A Pro is a compact and powerful Bluetooth 5.0 amplifier designed for high-fidelity audio. It delivers 300W x2 output, making it suitable for driving a wide range of passive speakers. A key feature is its replaceable Op-Amps, allowing users to customize the sound signature by swapping out the NE5532 Op-Amps with compatible models like LME49720HA, MUSES02, OPA2604AP, OPA2134PA, LM4562, or NJM4556AD. It also includes a pre-out port for connecting an active subwoofer or another power amplifier, offering flexibility for system expansion.

Figure 1: Fosi Audio BT20A Pro showcasing its compact and sleek design on a desk with a laptop and smartphone.

Figura 2: Primer plano view of the BT20A Pro's circuit board, highlighting the replaceable Op-Amp chips para personalización de sonido.

Figure 3: A diagram illustrating various connection options for the BT20A Pro, including Bluetooth, RCA, and outputs to passive speakers, active subwoofers, and other ampsalvavidas.

2.2 Fosi Audio T20X Bluetooth Tube Stereo Ampmás vivaz

The Fosi Audio T20X is a unique Bluetooth tube stereo amplifier that combines classic tube sound with modern connectivity. It features upgraded JAN 5654W Vacuum Tubes, which can be replaced with different models to customize the listening experience. The T20X also functions as a headphone amplifier with a 3.5mm output, supporting headphones with 16-300 ohms impedance. Bluetooth 5.0 ensures fast and stable wireless streaming up to 50ft/15m.

Figure 4: Fosi Audio T20X Bluetooth Tube Amplifier, highlighting its distinctive vacuum tubes and soft, clear sound.

Figura 5: detallada view of the upgraded GE JAN 5654W Vacuum Tubes used in the T20X, emphasizing their durability and audio resolution.

3. Guía de configuración

3.1 Speaker Connections (BT20A Pro)

1. Asegúrese de que ampAsegúrese de que el dispositivo esté apagado antes de realizar cualquier conexión.
2. Connect your passive speakers to the OUTPUT terminals on the rear panel using banana plugs or bare speaker wires. Ensure correct polarity (red to red, black to black).
3. If using an active subwoofer or another power amplifier, connect it to the PRE OUT (3.5mm) port on the rear panel.
4. Connect your audio source (e.g., CD player, DAC) to the LINE IN (RCA) inputs on the rear panel.
5. Attach the Bluetooth antenna to the designated port.
6. Connect the power adapter to the DC 24-48V input.

3.2 T20X Connections

1. Asegúrese de que ampAsegúrese de que el dispositivo esté apagado antes de realizar cualquier conexión.
2. Insert the JAN 5654W Vacuum Tubes into their sockets on the top panel.
3. Connect your passive speakers to the speaker output terminals on the rear panel.
4. For wired audio sources, connect to the RCA inputs.
5. For headphone use, plug your headphones into the 3.5mm headphone output on the front panel.
6. Attach the Bluetooth antenna to the designated port.
7. Conecte el adaptador de corriente a la entrada de CC.

3.3 Emparejamiento Bluetooth

1. Enciende el amplifier. The Bluetooth indicator light will activate.
2. On your source device (smartphone, tablet, computer), enable Bluetooth and search for "Fosi Audio BT20A Pro" or "Fosi Audio T20X" in the list of available devices.
3. Seleccione el amplifier to pair. A confirmation tone will sound upon successful pairing.
4. To disconnect or clear the current Bluetooth pairing, press and hold the volume control knob for 5 seconds. The amplifier has a memory function and will automatically reconnect to the last paired device when powered on.

4. Instrucciones de funcionamiento

4.1 Power On/Off & Input Selection

• BT20A Pro: Use the toggle switch on the front panel to power on/off and select between RCA (red light) and Bluetooth (blue light) inputs.
• T20X: Long-press the master volume knob to power on/off. Short-press the master volume knob to cycle through input modes (Bluetooth, RCA).

4.2 Ajuste de audio

• Volumen: Rotate the master volume knob clockwise to increase volume and counter-clockwise to decrease.
• Agudos / Graves: Adjust the dedicated treble and bass control knobs to fine-tune your audio output. The central detent position typically represents a flat frequency response.
• T20X Headphone Output: For private listening, plug your headphones into the 3.5mm jack on the front panel. The speaker outputs will be muted when headphones are connected.

5. Mantenimiento

• Mantener el amplifier in a dry, well-ventilated area away from direct sunlight and heat sources.
• Limpie el exterior con un paño suave y seco. Evite el uso de productos químicos agresivos o materiales abrasivos.
• Asegure una ventilación adecuada alrededor de la unidad para evitar el sobrecalentamiento.
• For T20X, handle vacuum tubes with care. Protective covers are provided to safeguard the tubes and prevent accidental burns.

6. Solución de problemas

6.1 No hay salida de sonido

• Verifique todas las conexiones de cables (alimentación, entrada, altavoz).
• Ensure the correct input mode is selected (Bluetooth or RCA).
• Verifique que el volumen no esté configurado al mínimo en ambos amplificador y el dispositivo fuente.
• If using headphones with T20X, ensure they are properly plugged in and that speaker outputs are expected to be muted.

6.2 Problemas de conectividad Bluetooth

• Asegúrese de que amplifier is in Bluetooth mode (blue indicator light).
• Clear previous pairings by holding the volume knob for 5 seconds and re-attempt pairing.
• Ensure your source device is within the 50ft/15m range.

6.3 Sonido distorsionado

• Reduce el volumen en ambos ampDispositivo fuente y amplificador.
• Check speaker wire connections for proper polarity.
• Ensure the impedance of your speakers is compatible with the ampmás duradero.

7. Especificaciones

8. Garantía y soporte

Fosi Audio products typically come with a standard manufacturer's warranty. Please refer to your product packaging or the official Fosi Audio webSitio para conocer los términos y condiciones específicos de la garantía.

For technical support, troubleshooting assistance, or any inquiries regarding your Fosi Audio amplifier, please visit the official Fosi Audio websitio: www.fosiaudio.es.