1. Introduktion
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. Vigtige sikkerhedsinstruktioner
- Strømkilde: Connect the unit only to a 120 V AC, 60 Hz power supply. Ensure the power cord is securely plugged in.
- Ventilation: Bloker ikke ventilationsåbningerne. Sørg for tilstrækkelig luftgennemstrømning omkring enheden for at forhindre overophedning.
- Fugtighed: Do not expose the unit to rain or moisture. Avoid placing objects filled with liquids, such as vases, on the apparatus.
- Fremmedobjekter: Indsæt ikke genstande i enhedens åbninger.
- Service: Overlad al service til kvalificeret servicepersonale. Forsøg ikke selv at servicere dette produkt.
- Jording: Sørg for korrekt jording for at forhindre elektrisk stød.
3. Pakkens indhold
Bekræft at alle varer er til stede i pakken:
- TOA A-848D Mixer/Digital Amplivligere
- Strømledning
- Removable Terminal Blocks (various sizes for inputs/outputs)
- Brugervejledning (dette dokument)
4. Produktet er slutview
4.1 Frontpanel
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.
- MASTER lydstyrkekontrol: Juster den samlede udgangslydstyrke.
- Power knap: Tænder eller slukker for enheden.
- LED Level Meter: Displays the output signal level.
- Statusindikatorer: LEDs for Error, Over Current, Thermal Protect, LAN Connect, Emergency, Priority, and CPU Run.
4.2 Bagpanel
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.
- AC strømindtag: Tilslut den medfølgende strømledning her.
- Højttalerudgange: 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.
- LAN-port: For network connection and IP control.
- REC OUT: RCA output for recording.
- PRE AMP UD: RCA output for connecting to an external power amplivligere.
- MODULE 1-2 Slots: Bays for installing optional 900 Series modules.
- DIP-switche: Various switches for configuring module functions, phantom power, and input types.
5. Opsætning og installation
- Placering: Placer amplifier on a stable, level surface with adequate ventilation. Avoid direct sunlight, heat sources, and excessive dust or moisture.
- Højttalerforbindelse: 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.
- Tilslutning af inputenhed:
- 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.
- Netværksforbindelse (valgfrit): For IP control and monitoring, connect an Ethernet cable from your network router/switch to the LAN port.
- Strømtilslutning: 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. Betjeningsvejledning
- Tænd: 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 afspilning af lyd fra din kildeenhed.
- 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.
- Tone Control: 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): Få adgang til amplifier's web interface via its IP address (refer to network setup instructions for details) to configure advanced settings, monitoring, and remote control.
- Sluk: To turn off the unit, press the Power button.
7. Vedligeholdelse
- Rensning: 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.
- Ventilation: Kontrollér regelmæssigt, at ventilationsåbningerne er fri for støv og snavs.
- Opbevaring: Hvis enheden opbevares i længere tid, skal den afbrydes fra strømmen og opbevares et køligt og tørt sted.
8. Fejlfinding
| Problem | Mulig årsag | Løsning |
|---|---|---|
| Ingen strøm | Netledning ikke tilsluttet; Stikkontakt defekt; Enhedens sikring er sprunget. | Check power cord connection; Try a different outlet; Contact service personnel for fuse replacement. |
| Ingen lydudgang | 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. |
| Forvrænget lyd | Input level too high (clipping); Speaker impedance mismatch; Faulty cable. | Reduce input level; Ensure speaker impedance matches amplifier; Replace audio cables. |
| Brummen eller støj | Ground loop; Poor cable shielding; Nearby electrical interference. | 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. |
Hvis problemet fortsætter efter at have forsøgt disse løsninger, bedes du kontakte kvalificeret servicepersonale.
9. Specifikationer
| Feature | Detalje |
|---|---|
| Model | A-848D |
| Strømkilde | 120 V AC, 60 Hz |
| Nominel output | 480 W |
| Strømforbrug | 621 W (rated output), 103 W (UL62368), 200 mA or less (power OFF) |
| Frekvensrespons | 50 Hz to 20 kHz ±3 dB (1/8 rated output) |
| Forvrængning | 1 % or less at 1 kHz, rated power |
| Tonekontrol | Bas: ±10 dB ved 100 Hz, diskant: ±10 dB ved 10 kHz |
| Signal til støj-forhold | 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. |
| Driftsfugtighed | 85 % RF eller mindre (ingen kondensering) |
| Slutte | Panel: ABS harpiks, sort |
| Varens vægt | 11.9 pund |
| Antal kanaler | 8 |
| Forbindelsesteknologi | Hjælpe |
10. Garanti og support
For garantioplysninger og teknisk support henvises til den dokumentation, der fulgte med dit køb, eller besøg de officielle servicevilkår. webForsøg ikke at reparere enheden selv, da dette kan ugyldiggøre din garanti.
