1. Introducció
This user manual provides essential information for the safe and efficient operation of your TOA A-712 120 Watt Integrated Mixer Amplifier. The A-712 is part of the TOA 700 Series, designed for versatile sound applications in various installed environments such as boardrooms, educational facilities, and houses of worship. It combines a mixer and amplifier into a single unit, offering robust performance and reliability.
Si us plau, llegiu aquest manual detingudament abans de fer funcionar la unitat i conserveu-lo per a futures consultes.
2. Instruccions de seguretat
To ensure safe operation and prevent damage to the unit or injury to personnel, observe the following safety precautions:
- Font d'alimentació: Connecteu la unitat només a la font d'alimentació especificada del voltage. Ensure the power cord is securely plugged into a grounded outlet.
- Ventilació: Do not block ventilation openings. Ensure adequate airflow around the unit to prevent overheating. Maintain at least 10 cm (4 inches) of clear space around the top and sides.
- Humitat i líquids: Do not expose the unit to rain, moisture, or splashing liquids. Do not place objects filled with liquids, such as vases, on the unit.
- Objectes estrangers: No introduïu objectes metàl·lics ni materials inflamables a les obertures de ventilació.
- Manteniment: No intenteu fer el manteniment d'aquest producte vosaltres mateixos. Envieu tot el manteniment a personal de servei qualificat. Obrir la unitat us pot exposar a corrents perillosos.tages o altres riscos.
- Col·locació: Place the unit on a stable, level surface. Avoid locations subject to direct sunlight, heat sources, excessive dust, or strong vibrations.
- Neteja: Desconnecteu el cable d'alimentació abans de netejar. Feu servir un drap sec per netejar. No utilitzeu netejadors líquids ni aerosols.
3. Producte acabatview
The TOA A-712 is a 120 Watt integrated mixer amplifier designed for commercial audio applications. It features six mic/line inputs, two auxiliary line inputs, and a 900 Series memory slot for optional modules. Each mic/line input includes a trim control and 23 VDC phantom power. Speaker outputs are available at 70.7V, 25V, and 4 ohms. A recording line output can be used for auxiliary connection or to an external booster amplifier. The unit also includes an auto-mute function, channel and master volume controls, bass/treble tone controls, and an output level meter.
Característiques principals:
- 9-channel integrated mixer/amplifier for paging and background/foreground music distribution.
- Two unbalanced auxiliary inputs with dual-RCA jacks for easy connection of stereo audio sources.
- Memory slot supports 900 Series plug-in modules for additional features.
- Transformer-isolation for telephone paging applications.
- 25V, 70.7V, and 4 ohm speaker outputs with removable terminal block connectors.
- Microphone trim control and 23 VDC phantom power on mic/line inputs.
- Auto-mute function with DIP switch assignment.
- Remote master volume and on/off control capability.
- Protecció tèrmica i curtcircuits.
- UL and cUL Listed.
Figura 3.1: Frontal view of the TOA A-712 Integrated Mixer Amplifier. This image shows the overall design of the unit, including the front panel controls and indicators.
Figure 3.2: Close-up of the product label on the TOA A-712. The label indicates "700 SERIES AMPLIFIER model A-712 OUTPUT RATED 120W TOA Corporation ENGINEERED IN JAPAN, ASSEMBLED IN CHINA" along with a serial number.
4. Configuració
4.1 Col·locació física
Place the A-712 on a flat, stable surface or install it in a standard 19-inch equipment rack. Ensure adequate ventilation around the unit. Do not place the unit near heat sources or in direct sunlight. Maintain at least 10 cm (4 inches) of clear space on the top and sides for proper heat dissipation.
4.2 Muntatge en bastidor
The TOA A-712 can be installed in a standard 19-inch equipment rack using the optional MB-25B Rack-Mount Kit. Attach the rack-mount brackets to the sides of the amplificador utilitzant els cargols proporcionats.
Figura 4.1: Primer pla view of a rack-mount bracket securely attached to the side of the TOA A-712 amplifier. This bracket facilitates installation into a standard equipment rack.
4.3 Connexions
Abans de fer cap connexió, assegureu-vos que amplifier is powered off and disconnected from the main power supply. Refer to the rear panel diagram for connection points.
Figura 4.2: posterior view of the TOA A-712 Integrated Mixer Amplifier. This image displays the various input terminals (Input 1-6, Aux), output terminals (Speaker Outputs, Rec Out, Pre Amp Out), remote control terminals, and DIP switches for mute assignment.
- Connexions d'entrada:
- Mic/Line Inputs (1-6): Connect microphones or line-level sources using XLR or terminal block connectors. Each input has a trim control and phantom power switch.
- Entrades auxiliars: Connect external audio devices (e.g., CD players, media players) to the RCA auxiliary inputs.
- Connexions de sortida:
- Sortides dels altaveus: Connect speakers to the 70.7V, 25V, or 4 ohm terminals using the removable terminal block connector. Ensure correct impedance matching.
- Recording Output (Rec Out): Use this RCA output to connect to a recording device or an external booster ampmés viu.
- Pre Amp Out / Power Amp En: These jacks allow for inserting external signal processing equipment (e.g., equalizers, compressors) into the signal path.
- Comandament a distància: Connect remote volume controls or external switch-closure devices for mute activation to the designated terminals.
- Connexió d'alimentació: After all audio connections are made, connect the power cord to the AC inlet on the rear panel and then to a suitable power outlet.
5. Instruccions de funcionament
5.1 Engegada/apagada
Per encendre la unitat, premeu el botó PODER button located on the front panel. The power indicator will illuminate. To power off, press the button again.
Figure 5.1: Close-up of the TOA A-712 front panel, highlighting the MASTER volume knob, POWER button, and the LED output level meter. The power indicator is visible next to the power button.
5.2 Ajust del nivell d'entrada
Adjust the individual input level controls (INPUT 1-6, INPUT 7, INPUT 8) on the front panel to achieve the desired balance between sources. Use the MIC TRIM controls on the rear panel for fine-tuning microphone input sensitivity.
Figure 5.2: Close-up of the TOA A-712 front panel, showing the individual input volume knobs (INPUT 1 through INPUT 8, and MODULE) along with the BASS and TREBLE tone controls.
5.3 Controls de to
Utilitza el BASS i AGUTS knobs on the front panel to adjust the overall tonal characteristics of the output sound. Turn clockwise to boost, counter-clockwise to cut.
5.4 Volum mestre
El MESTRE volume knob controls the overall output level of the amplifier. Adjust this control to set the final listening volume. Monitor the output level meter to prevent clipping (distortion).
5.5 Auto-Mute Function
The A-712 features a priority auto-mute function. Inputs can be assigned to activate or respond to the mute function using the DIP switches on the rear panel. Muting can also be activated via an external switch-closure.
6. Manteniment
Regular maintenance helps ensure the longevity and optimal performance of your TOA A-712.
- Neteja: Disconnect the power cord before cleaning. Use a soft, dry cloth to wipe down the exterior of the unit. Do not use abrasive cleaners, solvents, or waxes.
- Ventilació: Periodically check that the ventilation openings are clear of dust and debris. Blocked vents can lead to overheating and potential damage.
- Connexions: De tant en tant, comproveu totes les connexions dels cables per assegurar-vos que estiguin ben fixades i que no presentin corrosió.
- Emmagatzematge: If storing the unit for an extended period, ensure it is in a dry, cool environment, away from direct sunlight and extreme temperatures.
7. Solució De Problemes
This section addresses common issues you might encounter with your TOA A-712. If the problem persists after following these steps, contact qualified service personnel.
| Problema | Causa possible | Solució |
|---|---|---|
| Sense poder | Power cord disconnected; Power outlet faulty; Internal fuse blown | Check power cord connection; Test power outlet with another device; Contact service personnel for fuse replacement. |
| Sense sortida de so | Master volume too low; Input volume too low; Speaker connections incorrect; Mute function active; Incorrect input selected | Increase Master volume; Increase individual input volume; Verify speaker wiring and impedance; Check mute DIP switch settings; Ensure correct input source is active. |
| So distorsionat | Input level too high (clipping); Speaker impedance mismatch; Faulty cable/speaker | Reduce input level; Verify speaker impedance matches amplifier output; Check cables and speakers for damage. |
| La unitat es sobreescalfa | Blocked ventilation; Insufficient airflow; Prolonged high-power operation | Ensure ventilation openings are clear; Provide adequate space around the unit; Reduce output level if operating continuously at maximum. |
8. Especificacions
The following specifications are typical for the TOA A-712 Integrated Mixer Ampmés viu:
| Paràmetre | Valor |
|---|---|
| Model | A-712 |
| Potència de sortida nominal | 120 watts |
| Nombre de canals | 9 (6 Mic/Line, 2 Aux, 1 Module Slot) |
| Sortides d'altaveus | 25V, 70.7V, 4 Ohms |
| Tecnologia de connectivitat | RCA, XLR, Terminal Block |
| Font d'alimentació | Elèctric amb cable |
| Dimensions del producte (L x A x A) | 37.29 x 42.67 x 10.92 cm (14.68 x 16.8 x 4.3 polzades) |
| Pes del producte | 12.38 kg (27.3 lliures) |
| Poder fantasma | 23 VDC (selectable per input) |
9. Garantia i Suport
The TOA A-712 Integrated Mixer Amplifier comes with a five-year warranty, ensuring reliability and peace of mind. This warranty covers defects in materials and workmanship under normal use.
For technical support, service, or warranty claims, please contact your authorized TOA dealer or distributor. Do not attempt to repair the unit yourself, as this may void the warranty and pose safety risks.
For the most up-to-date support information and contact details, please refer to the official TOA weblloc web o la documentació de la compra.
