1. Introducció
This manual provides essential information for the safe and efficient operation of your Ahuja DPA-770 Amplifier. Please read these instructions thoroughly before using the product to ensure proper setup, operation, and maintenance. Retain this manual for future reference.
2. Instruccions de seguretat importants
- Font d'alimentació: Connecteu el amplifier only to the specified AC voltage (220-240V 50/60Hz) or DC voltage (12-14V car battery).
- Ventilació: Assegureu-vos que hi hagi una ventilació adequada. No bloquegeu les obertures de ventilació.
- Aigua i humitat: No exposar el amplifier to rain or moisture. Do not place objects filled with liquids on the apparatus.
- Manteniment: No intenteu atendre aquest producte vosaltres mateixos. Consulteu tots els serveis a personal de servei qualificat.
- Neteja: Unplug the unit from the power source before cleaning. Use a dry cloth for cleaning.
- Sobrecàrrega: Eviteu sobrecarregar el amplifier. Ensure speaker impedance matches the amplifier's output specifications.
3. Característiques clau
The Ahuja DPA-770 Amplifier is designed for versatile audio applications, offering the following features:
- 4 Microphone (Mic) inputs and 1 Auxiliary (Aux) input for diverse audio sources.
- Integrated MP3 player with USB reader and remote control for convenient audio playback.
- Line Output for connection to an external booster amplifier, expanding sound coverage.
- Active Bass and Treble controls for precise tone adjustment.
- Automatic transfer to DC power (car battery) in case of AC power failure, ensuring uninterrupted operation.
- Multiple speaker output options: 4Ω, 8Ω, 16Ω, and 100V line.
4. Producte acabatview
Below is an image of the Ahuja DPA-770 Amplifier, highlighting its front panel controls and connections.
Figura 1: Front panel of the Ahuja DPA-770 Amplifier. This image displays the various input controls for microphones and auxiliary sources, bass and treble adjustments, master volume, the integrated MP3 player with USB port, and the power switch with output level indicators.
The front panel includes individual volume controls for each microphone input (MIC-1, MIC-2, MIC-3/AUX, MIC-4/USB), Bass and Treble tone controls, a Master volume knob, and the MP3 player interface with a USB port. Output level indicators and the main power switch are also located on the front panel.
5. Instruccions de configuració
5.1 Connexió d'alimentació
- Alimentació CA: Connecteu el amplifier to a standard 220-240V AC, 50/60Hz power outlet using the provided power cord.
- Alimentació de CC (opcional): For backup or portable use, connect a 12-14V car battery to the DC input terminals. The amplifier will automatically switch to DC power if AC power fails.
5.2 Connexió dels altaveus
Connect your speakers to the appropriate output terminals on the rear panel. Ensure the total impedance of your speakers matches the amplifier's output impedance (4Ω, 8Ω, 16Ω) or use the 100V line output for constant voltage speaker systems.
- For low impedance speakers, connect to the 4Ω, 8Ω, or 16Ω terminals.
- For 100V line speaker systems, connect to the 100V terminal.
5.3 Connexions d'entrada
- Micròfons: Connect microphones to the MIC-1, MIC-2, MIC-3/AUX, or MIC-4/USB input jacks.
- Dispositius auxiliars: Connect audio sources like CD players, laptops, or smartphones to the AUX input. Note that MIC-3/AUX shares an input, and MIC-4/USB shares an input.
- Reproducció USB: Inseriu una unitat USB que contingui àudio MP3 files al port USB del panell frontal.
- Sortida de línia: If connecting to a booster amplifier, use the Line Output jack.
6. Instruccions de funcionament
6.1 Engegada/apagada
Premeu l'interruptor POWER del panell frontal per engegar amplifier ON or OFF. The output level indicators will illuminate when the unit is powered on.
6.2 Control de volum
- Individual Input Volume: Adjust the volume for each connected microphone or auxiliary source using its dedicated knob (MIC-1, MIC-2, MIC-3/AUX, MIC-4/USB).
- Volum mestre: Use the MASTER knob to control the overall output volume of the ampmés viu.
Control de 6.3 tons
Adjust the BASS and TREBLE knobs to fine-tune the audio frequency response to your preference or acoustic environment.
6.4 MP3 Player Operation
When a USB drive with MP3 files is inserted, the built-in MP3 player will automatically detect and begin playback. Use the controls on the front panel or the remote control to navigate tracks, play/pause, and adjust MP3 volume.
7. Manteniment
- Neteja: Netegeu regularment l'exterior de la amplifier with a soft, dry cloth. Do not use liquid cleaners or solvents.
- Ventilació: Ensure that the ventilation grilles are free from dust and obstructions to prevent overheating.
- Emmagatzematge: Quan no s'utilitzi durant períodes prolongats, guardeu-lo ampGuardar en un lloc fresc i sec, allunyat de la llum solar directa i de temperatures extremes.
- Inspecció: Reviseu periòdicament tots els cables i connexions per detectar desgast o danys.
8. Solució De Problemes
| Problema | Causa possible | Solució |
|---|---|---|
| Sense poder | Power cord disconnected; AC outlet faulty; DC battery discharged. | Check power cord connection; Test AC outlet; Recharge or replace DC battery. |
| Sense sortida de so | Speaker connections loose; Input source not connected; Volume knobs turned down; Incorrect input selected. | Verify speaker wiring; Ensure input source is connected and active; Increase individual and master volume; Select correct input. |
| So distorsionat | Input signal too high; Speaker impedance mismatch; Faulty speaker. | Reduce input volume; Check speaker impedance; Test with different speakers. |
| El reproductor de MP3 no funciona | USB drive not inserted correctly; USB drive corrupted; Unsupported file format. | Reinsert USB drive; Try a different USB drive; Ensure filesón en format MP3. |
Si el problema persisteix després d'intentar aquestes solucions, poseu-vos en contacte amb personal de servei qualificat.
9. Especificacions tècniques
- Potència de sortida: 100W Max., 75W RMS at 10% THD, 70W RMS at 5% THD
- Regulació de sortida: ≤ 2 dB, no load to full load at 1kHz
- Canals d'entrada: 4 × Mic. 0.6mV/4.7kΩ, 1 × Aux 100mV/330kΩ
- Resposta de freqüència: 50-15,000Hz ±3dB
- Relació senyal/soroll: 55 dB
- Controls de to: Bass: -10dB +7dB at 100Hz, Treble: -10dB +7dB at 10kHz
- Sortides: Line: 1V/3.5kΩ, Speaker Outputs: 4Ω, 8Ω, 16Ω & 100V
- Font d'alimentació: AC: 220-240V 50/60Hz, DC: 12-14V Car Battery
- Consum d'energia: AC: 140VA, DC: 3A
- Dimensions del producte: 30 x 38.5 x 12.5 cm
- Pes de l'article: 10.2 kg
- Número de model: DPA-770M
- Fabricant: AHUJA
- País d'origen: Índia
10. Informació de la garantia
For warranty details and terms, please refer to the warranty card included with your product or contact Ahuja customer support. Keep your purchase receipt as proof of purchase.
11. Atenció al client
For technical assistance, service, or spare parts, please contact your authorized Ahuja dealer or visit the official Ahuja weblloc per obtenir informació de contacte.
Note: Product specifications are subject to change without prior notice for improvement.