1. Introdución
This manual provides essential information for the safe and efficient operation of your TOA A-848D Mixer/Digital Amplifier. Please read this manual thoroughly before use and retain it for future reference. The A-848D is a versatile mixer amplifier designed for various audio applications, offering up to eight inputs and 480W of power, with features like IP control and onboard DSP.
2. Instrucións de seguridade importantes
- Fonte de enerxía: Connect the unit only to a 120 V AC, 60 Hz power supply. Ensure the power cord is securely plugged in.
- Ventilación: Non bloquee as aberturas de ventilación. Asegúrese de que haxa un fluxo de aire axeitado arredor da unidade para evitar o sobrequecemento.
- Humidade: Do not expose the unit to rain or moisture. Avoid placing objects filled with liquids, such as vases, on the apparatus.
- Obxectos estranxeiros: Do not insert any objects into the unit's openings.
- Servizo: Encomende calquera tarefa de mantemento a persoal de servizo cualificado. Non intente reparar este produto vostede mesmo.
- Conexión a terra: Asegúrese de conectar a terra adecuada para evitar descargas eléctricas.
3. Contido do paquete
Verifica que todos os elementos estean presentes no paquete:
- TOA A-848D Mesturador/Digital Ampmáis vivo
- Cable de alimentación
- Removable Terminal Blocks (various sizes for inputs/outputs)
- Manual de usuario (este documento)
4. Produto rematadoview
4.1 Panel frontal
Figure 4.1: Front Panel of the TOA A-848D. This image displays the front of the amplifier, featuring six input level controls, two module level controls, Bass and Treble tone controls, a Master volume knob, and a power button. An LED display shows output levels, and status indicators for Error, Over Current, Thermal Protect, LAN Connect, Emergency, Priority, and CPU Run are visible.
- INPUT 1-6 Level Controls: Adjust the input level for each of the six audio inputs.
- MODULE 1-2 Level Controls: Adjust the input level for optional 900 Series modules.
- BASS/TREBLE Tone Controls: Adjust the low and high frequency response of the output.
- Control de volume MASTER: Axuste o volume de saída global.
- Botón de encendido: Acende ou apaga a unidade.
- LED Level Meter: Displays the output signal level.
- Indicadores de estado: LEDs for Error, Over Current, Thermal Protect, LAN Connect, Emergency, Priority, and CPU Run.
4.2 Panel posterior
Figure 4.2: Rear Panel of the TOA A-848D. This image shows the rear connections, including the AC power inlet, speaker outputs, remote control terminals, various input terminals (MIC/LINE, phantom power switches), LAN port, pre-amp out, and slots for two 900 Series modules. Dip switches for module settings are also visible.
- Entrada de alimentación de CA: Conecte aquí o cable de alimentación subministrado.
- Saídas de altofalantes: Terminals for connecting loudspeakers.
- POWER REMOTE OUT: For remote power control.
- EMERGENCY OUT: For emergency system integration.
- INPUT 1-4 (MIC/LINE): Electronically-balanced removable terminal blocks. Phantom power (24V DC) is switchable for INPUT 1-4.
- INPUT 5-6 (MIC/LINE/RCA): Electronically-balanced removable terminal blocks for MIC, or unbalanced RCA pin jacks for LINE.
- Porto LAN: For network connection and IP control.
- REC OUT: RCA output for recording.
- PRE AMP FÓRA: RCA output for connecting to an external power ampmáis vivo.
- MODULE 1-2 Slots: Bays for installing optional 900 Series modules.
- Interruptores DIP: Various switches for configuring module functions, phantom power, and input types.
5. Configuración e instalación
- Colocación: Coloca o amplifier on a stable, level surface with adequate ventilation. Avoid direct sunlight, heat sources, and excessive dust or moisture.
- Conexión do altofalante: Connect your loudspeakers to the appropriate speaker output terminals on the rear panel. Ensure correct polarity (+ to + and - to -). Refer to the speaker impedance and power handling specifications.
- Conexión do dispositivo de entrada:
- For microphones or line-level devices, connect to INPUT 1-6 using the removable terminal blocks.
- If using condenser microphones, activate the phantom power switch for the corresponding input on the rear panel.
- For line-level devices with RCA outputs, use INPUT 5 or 6 RCA jacks.
- Module Installation (Optional): If using 900 Series modules, carefully insert them into MODULE 1 or 2 slots on the rear panel. Configure the associated DIP switches as required by the module's instructions.
- Conexión de rede (opcional): For IP control and monitoring, connect an Ethernet cable from your network router/switch to the LAN port.
- Conexión de alimentación: Ensure all audio connections are made before connecting the power cord. Plug the supplied power cord into the AC Power Inlet on the rear panel, then into a suitable 120 V AC, 60 Hz wall outlet.
6. Instrucións de funcionamento
- Encendido: Press the Power button on the front panel. The unit's indicators will illuminate.
- Initial Volume Settings: Before playing audio, set all INPUT level controls and the MASTER volume control to their minimum positions.
- Adjusting Input Levels:
- Start playing audio from your source device.
- Slowly increase the corresponding INPUT level control until the LED level meter shows a healthy signal without clipping (avoiding the red segment).
- Adjusting Master Volume: Once individual input levels are set, slowly increase the MASTER volume control to achieve the desired overall output level.
- Control de ton: Use the BASS and TREBLE controls to fine-tune the audio's low and high frequencies to suit your preference or room acoustics.
- IP Control (if connected): Accede a amplificadores web interface via its IP address (refer to network setup instructions for details) to configure advanced settings, monitoring, and remote control.
- Apagado: To turn off the unit, press the Power button.
7. Mantemento
- Limpeza: Disconnect the power cord before cleaning. Use a soft, dry cloth to wipe the exterior of the unit. Do not use liquid cleaners or aerosols.
- Ventilación: Comprobe periodicamente que as aberturas de ventilación estean libres de po e residuos.
- Almacenamento: Se garda a unidade durante un período prolongado, desconéctea da corrente e gárdea nun lugar fresco e seco.
8 Solución de problemas
| Problema | Causa posible | Solución |
|---|---|---|
| Sen poder | Power cord not connected; Power outlet faulty; Unit fuse blown. | Check power cord connection; Try a different outlet; Contact service personnel for fuse replacement. |
| Sen saída de son | Master volume too low; Input level too low; Speaker connections incorrect; Mute function active; Source device not playing. | Increase Master volume; Increase input level; Check speaker wiring and polarity; Check for mute settings (if applicable); Verify source device operation. |
| Son distorsionado | Input level too high (clipping); Speaker impedance mismatch; Faulty cable. | Reduce input level; Ensure speaker impedance matches amplifier; Replace audio cables. |
| Zumbido ou ruído | Bucle de terra; mal apantallamento do cable; interferencias eléctricas próximas. | Ensure proper grounding; Use shielded cables; Move unit away from interference sources. |
| Thermal Protect LED active | Unit overheating due to blocked ventilation or excessive load. | Turn off unit, allow to cool; Ensure ventilation is clear; Reduce output load if possible. |
Se o problema persiste despois de intentar estas solucións, póñase en contacto co persoal de servizo cualificado.
9. Especificacións
| Característica | Detalle |
|---|---|
| Modelo | A-848D |
| Fonte de enerxía | 120 V CA, 60 Hz |
| Saída nominal | 480 W |
| Consumo de enerxía | 621 W (rated output), 103 W (UL62368), 200 mA or less (power OFF) |
| Resposta en frecuencia | 50 Hz to 20 kHz ±3 dB (1/8 rated output) |
| Distorsión | 1 % or less at 1 kHz, rated power |
| Control de ton | Graves: ±10 dB a 100 Hz, Agudos: ±10 dB a 10 kHz |
| Relación sinal a ruído | 88 dB or more (Master min), 76 dB or more (Master max), 55 dB or more (INPUT 1 to 6) (A-weighted) |
| Inputs 1, 2 | -60 dB (MIC)/-20 dB (LINE) selectable, 600 Ω, electronically-balanced, removable terminal block (3.81 mm, 3 pins). Phantom power (24 V DC, ON/OFF switchable). |
| Inputs 3, 4 | -60 dB, 600 Ω, electronically-balanced, removable terminal block (3.81 mm, 3 pins). Phantom power (24 V DC, ON/OFF switchable). |
| Inputs 5, 6 | MIC: -60 dB, 600 Ω, electronically-balanced, removable terminal block (3.81 mm, 3 pins). LINE: -20 dB, 10 kΩ, unbalanced, RCA pin jack x 2. |
| Humidade de funcionamento | 85 % RH ou menos (sen condensación) |
| Remate | Panel: resina ABS, negro |
| Peso do elemento | 11.9 libras |
| Número de canles | 8 |
| Tecnoloxía de conectividade | Auxiliar |
10. Garantía e soporte
For warranty information and technical support, please refer to the documentation provided with your purchase or visit the official TOA websitio. Non intente reparar a unidade vostede mesmo, xa que isto podería anular a garantía.
