1. Uvod
This manual provides essential information for the proper installation, operation, and maintenance of your JBL Libra_500 Mixer Ampspašivač. Molimo vas da pažljivo pročitate ovaj priručnik prije upotrebe proizvoda kako biste osigurali optimalne performanse i sigurnost.
1.1 Ključne karakteristike
- Portable design, suitable for various PA applications.
- Desktop design for either lying flat or keeping upright the unit on a suitable surface.
- Extendable with its preamp/line output for larger applications.
- Overload and low voltage protection for enhanced durability.
- AC and DC Power Supply options for versatile use.
Slika 1.1: Front view of the JBL Libra_500 Mixer Amplifier. This image displays the compact and robust design of the amplifier, suitable for various professional audio setups.
2. Sigurnosne informacije
Uvijek se pridržavajte sljedećih sigurnosnih mjera opreza kako biste spriječili strujni udar, požar ili oštećenje uređaja.
- Ne izlažite ovaj uređaj kiši ili vlazi.
- Ne blokirajte ventilacijske otvore. Instalirajte u skladu s uputama proizvođača.
- Ne postavljajte u blizini izvora toplote kao što su radijatori, grejni registri, peći ili drugi uređaji (uključujući ampLifiers) koji proizvode toplotu.
- Zaštitite kabel za napajanje od naleta ili stezanja, posebno na utikačima, praktičnim utičnicama i mjestu na kojem izlaze iz uređaja.
- Koristite samo dodatke/pribor koje je naveo proizvođač.
- Sve servise prepustite kvalificiranom servisnom osoblju. Servisiranje je potrebno ako je aparat na bilo koji način oštećen.
3. Sadržaj paketa
Provjerite da li se u vašem paketu nalaze sve dolje navedene stavke. Ako neke stavke nedostaju ili su oštećene, odmah se obratite prodavaču.
- JBL Libra_500 Mixer AmpLifier Unit
- AC strujni kabl
- Korisnički priručnik (ovaj dokument)
- Garantni list (ako postoji)
4. Komponente i kontrole proizvoda
The JBL Libra_500 Mixer Amplifier features a straightforward interface for ease of use in various PA applications. While specific diagrams are not provided, understanding the general layout of mixer amplifiers will be beneficial.
4.1 Kontrole na prednjoj ploči
- Prekidač: Uključuje ili isključuje jedinicu.
- Glavna kontrola jačine zvuka: Prilagođava ukupni nivo izlaza.
- Input Level Controls: Individual controls for each input channel (if present).
- Tone Controls (Bass): Adjusts the low-frequency response (± 10 dB at 100 Hz).
- Indikatori: Power, signal, and protection status indicators.
4.2 Priključci stražnje ploče
- Ulaz za izmjeničnu struju: Connects the supplied AC power cord (240V 50/60 Hz).
- DC ulaz napajanja: Connects to a 36V DC power source for alternative power.
- Izlazi za zvučnike: Barrier strip connections for 4Ω/8Ω and 70V/100V speaker systems. Use 2 x (≥ 16 AWG) cables.
- Audio ulazi: Various input jacks for microphones, line-level devices, etc.
- Preamp/Line Output: For extending the system to larger applications or connecting to external power amplifiers.
5. Upute za postavljanje
Follow these steps to set up your JBL Libra_500 Mixer Amplifier.
5.1 Postavljanje
- Postavite ampPostavite uređaj na stabilnu, ravnu površinu. Osigurajte odgovarajuću ventilaciju oko uređaja.
- Izbjegavajte postavljanje jedinice u blizini izvora topline ili na direktnu sunčevu svjetlost.
5.2 Povezivanje zvučnika
- Osigurajte ampUređaj za spašavanje je isključen iz struje i iskopčan iz struje.
- Connect your speakers to the appropriate barrier strip terminals on the rear panel.
- For low impedance speakers, connect to the 4Ω or 8Ω terminals, matching the speaker impedance.
- Za konstantni napon 70V/100Vtage systems, connect to the 70V or 100V terminals.
- Use speaker cables of at least 16 AWG for optimal performance and safety.
- Osigurajte ispravan polaritet (+ na + i - na -) za sve priključke zvučnika.
5.3 Povezivanje audio izvora
- Sa amplifier still off, connect your audio sources (e.g., microphones, CD players, media players) to the input jacks on the rear panel.
- Uvjerite se da su sve veze sigurne.
5.4 Priključak za napajanje
- AC napajanje: Connect the supplied AC power cord to the AC power input on the rear panel, then plug it into a suitable 240V 50/60 Hz wall outlet.
- DC snaga: Alternatively, for DC operation, connect a 36V DC power source to the DC power input terminals. Ensure correct polarity.
6. Uputstvo za upotrebu
Jednom amplifier is set up, follow these steps for operation.
6.1 Uključivanje/isključivanje
- Before powering on, ensure all volume controls are set to their minimum position.
- Press the Power Switch on the front panel to turn the unit on. The power indicator should illuminate.
- To power off, set all volume controls to minimum, then press the Power Switch.
6.2 Podešavanje jačine zvuka
- Start playing audio from your source.
- Gradually increase the individual input level control for the active source.
- Slowly raise the Master Volume control to achieve the desired overall output level.
- Monitor the signal indicators to avoid clipping or distortion.
6.3 Using Tone Controls
- The Bass tone control allows you to adjust the low-frequency response of the audio.
- Turn the Bass knob clockwise to boost low frequencies (up to +10 dB at 100 Hz).
- Turn the Bass knob counter-clockwise to cut low frequencies (down to -10 dB at 100 Hz).
- Adjust to suit your preference and the acoustics of the environment.
7. Održavanje
Proper maintenance ensures the longevity and reliable operation of your amplifier.
- čišćenje: Disconnect power before cleaning. Use a soft, dry cloth to wipe the exterior. Do not use liquid cleaners or aerosols.
- ventilacija: Regularly check that ventilation openings are clear of dust and debris to prevent overheating.
- Skladištenje: If storing the unit for an extended period, ensure it is powered off, unplugged, and stored in a cool, dry place away from direct sunlight.
8. Otkrivanje problema
If you encounter issues, refer to the following common problems and solutions before contacting service personnel.
| Problem | Mogući uzrok | Rješenje |
|---|---|---|
| Nema struje | Power cord not connected; Power outlet faulty; Power switch off | Provjerite priključak kabela za napajanje; Pokušajte s drugom utičnicom; Provjerite je li prekidač za napajanje UKLJUČEN |
| Nema izlaza zvuka | Volume controls too low; Speaker connections incorrect; Audio source not playing; Input selected incorrectly | Increase Master and Input volume; Verify speaker wiring and impedance; Check audio source; Select correct input channel |
| Izobličen zvuk | Input level too high; Speaker impedance mismatch; Faulty cables | Smanjite ulazni nivo; Provjerite impedancu zvučnika. amplifier output; Check/replace cables |
| Jedinica se pregreva | Blokirana ventilacija; Prekomjerno opterećenje | Ensure ventilation openings are clear; Reduce output level or speaker load |
9. Specifikacije
Detailed technical specifications for the JBL Libra_500 Mixer Amplifier.
| Broj modela | Libra_500 |
| Rated Power (AC, 1kHz, 4Ω, THD 10%) | 500 W |
| DC Power Supply Output Power | ≥ 50% rated power |
| Napajanje (AC) | 240V 50/60Hz |
| Napajanje (jednosmjerna struja) | 36 V |
| Frekvencijski odziv | 50-15,000 Hz ± 3dB |
| Odnos signala i šuma | ≥ 70 dB |
| Tone Controls (Bass) | ± 10 dB na 100 Hz |
| Izlazna uredba | ≤ 3 dB, no load to full load at 1kHz |
| Izlazne veze zvučnika | 4Ω/8Ω & 70V/100V (Barrier Strip, with touch proof cover) |
| Recommended Speaker Cable | 2 x (≥ 16 AWG) Cables |
| Dimenzije proizvoda (DxŠxV) | 46.8 x 41 x 46.8 cm |
| Težina artikla | 22.1 kg |
| Boja | Crna |
| Proizvođač | JBL |
10. Garancija i podrška
JBL products are designed for reliability and performance. For specific warranty terms and conditions, please refer to the warranty card included with your product or visit the official JBL website.
For technical support, service, or replacement parts, please contact your authorized JBL dealer or visit the JBL support portal online. Ensure you have your product model number (Libra_500) and purchase information available when seeking support.
Proizvođač: JBL