1. Uvod
Thank you for choosing the Gravity MGR-208BT Marine Receiver. This unit is designed to provide high-quality audio entertainment in marine environments, featuring CD, SD, USB, Aux, AM/FM radio, and Bluetooth connectivity. This manual provides essential information for proper installation, operation, and maintenance of your receiver.
2. Sigurnosne informacije
- Napajanje: Ensure the unit is connected to a 12V DC power supply with negative grounding. Incorrect voltage može uzrokovati štetu.
- Ožičenje: Connect all wires correctly according to the wiring diagram. Improper wiring can lead to malfunctions or damage.
- Izloženost vodi: While designed for marine use, avoid direct high-pressure water spray or submersion. Ensure all connections are properly sealed.
- temperatura: Do not operate the unit in extreme temperatures.
- ventilacija: Osigurajte odgovarajuću ventilaciju oko uređaja kako biste spriječili pregrijavanje.
- Nivo glasnoće: Avoid excessively high volume levels that could impair your ability to hear important sounds or cause hearing damage.
3. Sadržaj paketa
Molimo Vas da provjerite da li se u paketu nalaze svi artikli:
- Gravity MGR-208BT Marine Receiver
- kabelskog svežnja
- Mounting Hardware (Screws, Brackets)
- Daljinski upravljač
- Korisnički priručnik (ovaj dokument)
4. Proizvod je gotovview
4.1 Kontrole na prednjoj ploči

Slika: Front view of the Gravity MGR-208BT marine receiver, showing the detachable faceplate, large volume knob, LCD display, CD slot, USB port, SD card slot, and various control buttons.
- PWR/MODE Button: Press to turn on/off. Press to cycle through audio sources (Radio, CD, USB, SD, AUX, Bluetooth).
- Gumb za jačinu zvuka: Okrenite za podešavanje jačine zvuka. Pritisnite za pristup audio postavkama (bas, visoki tonovi, balans, fader, ekvilajzer).
- Dugme AMS: In radio mode, press to automatically scan and store stations. In playback mode, press for folder/track search.
- BND Button: In radio mode, press to select radio bands (FM1, FM2, FM3, AM1, AM2).
- MU Button: Isključivanje/uključivanje zvuka.
- ST/LOC Button: In radio mode, toggles between Stereo/Mono reception and Local/Distant tuning.
- Dugme DISP: Changes display information (e.g., clock, track time).
- LU Button: Controls illumination color (if applicable).
- SCN Button: Scans through tracks or radio stations.
- Track Skip Buttons (◀◀ / ►►): Skips tracks/files or tunes radio stations.
- Play/Pause Button (►▌▌): Reprodukuje ili pauzira reprodukciju medija.
- Utor za CD: Insert CDs for playback.
- USB port: Spojite USB uređaje za pohranu podataka za reprodukciju medija.
- Utor za SD karticu: Umetnite SD kartice za reprodukciju medija.
- AUX ulaz: 3.5 mm priključak za povezivanje eksternih audio uređaja.
- MIC: Built-in microphone for Bluetooth calls (if supported).
4.2 Priključci stražnje ploče

Slika: Stražnja strana view of the Gravity MGR-208BT marine receiver, illustrating the main wiring harness connector, antenna input, and RCA audio output jacks.
- Konektor kabelskog svežnja: Connects to the included wiring harness for power, ground, and speaker outputs.
- Antenski ulaz: Connects to your marine antenna for AM/FM reception.
- RCA izlazni priključci: Za povezivanje s vanjskim amplifiers (Front L/R, Rear L/R).
5. Instalacija
Proper installation is crucial for optimal performance and safety. If you are unsure about any steps, consult a qualified marine electronics technician.
5.1 Dijagram ožičenja
Refer to the wiring diagram provided with your unit's wiring harness. Key connections include:
- Yellow (Constant +12V): Connect to a constant 12V power source (e.g., battery positive terminal) to retain memory settings.
- Red (Accessory +12V): Connect to a switched 12V power source (e.g., ignition switch) that turns on/off with your vessel's power.
- Crna (uzemljena): Spojite na čistu tačku uzemljenja šasije.
- Blue (Remote Turn-On): Connect to the remote input of an external ampspašivač (ako se koristi).
- Žice zvučnika: Connect to your speakers, ensuring correct polarity (+/-) for each channel. Typically, white/white-black for front left, gray/gray-black for front right, green/green-black for rear left, purple/purple-black for rear right.
5.2 Montaža
The MGR-208BT is a single DIN unit. Ensure there is sufficient space behind the mounting location for wiring and ventilation. Secure the unit using the provided mounting hardware.
6. Operacija
6.1 Osnovne funkcije
- Uključivanje/isključivanje: Pritisnite NAPAJANJE/REŽIM dugme.
- Kontrola jačine zvuka: Rotirajte Tipka za jačinu zvuka.
- Izbor izvora: Pritisnite NAPAJANJE/REŽIM button repeatedly to cycle through Radio, CD, USB, SD, AUX, and Bluetooth modes.
- Audio postavke: Pritisnite Tipka za jačinu zvuka to access Bass, Treble, Balance, Fader, and Preset EQ settings (Rock, Classic, Pop). Rotate the knob to adjust, press again to confirm or move to the next setting.
6.2 Radio (AM/FM)
- Odaberite bend: U načinu rada Radio pritisnite BND to select FM1, FM2, FM3, AM1, or AM2.
- Ručno podešavanje: Pritisnite i držite ◀◀ or ►► dugmad za ručno podešavanje frekvencija.
- Automatsko traženje: Kratko pritisnite ◀◀ or ►► buttons to seek the next strong station.
- Pohraniti unaprijed postavljene postavke: Tune to a desired station, then press and hold a preset number button (1-6) to store it.
- Podsjetite unaprijed postavljene postavke: Briefly press a preset number button (1-6) to recall a stored station.
- Automatic Store (AMS): Pritisnite AMS to automatically scan and store the strongest stations into presets.
6.3 Reprodukcija CD-a/MP3-a
- Umetni disk: Gently insert a CD into the CD slot with the label side up. The unit will automatically switch to CD mode and begin playback.
- Pusti/pauza: Pritisnite ►▌▌ dugme.
- Track Skip: Pritisnite ◀◀ or ►► za prelazak na prethodnu ili sljedeću pjesmu.
- Premotavanje naprijed/nazad: Pritisnite i držite ◀◀ or ►►.
- Folder Navigation (MP3/WMA): Koristite AMS button or specific folder buttons (if available) to navigate folders.
6.4 Reprodukcija sa USB-a/SD kartice
- Umetni uređaj: Insert a USB drive into the USB port or an SD card into the SD card slot. The unit will automatically switch to USB/SD mode and begin playback.
- Kontrole reprodukcije: Use the same controls as CD/MP3 playback for Play/Pause, Track Skip, Fast Forward/Rewind, and Folder Navigation.
6.5 Bluetooth rad
- Uparivanje:
- Turn on the MGR-208BT and select Bluetooth mode.
- Omogućite Bluetooth na svom mobilnom uređaju i potražite dostupne uređaje.
- Select "MGR-208BT" from the list. If prompted for a password, enter "0000".
- Once paired, the unit will confirm connection.
- Audio streaming (A2DP): After pairing, you can stream audio from your device to the receiver. Use the receiver's controls (Play/Pause, Track Skip) or your device's controls.
- Hands-free pozivanje: If your unit supports hands-free calling (indicated by a MIC), you can answer/end calls using the appropriate buttons on the receiver (refer to specific button labels if available).
6.6 AUX ulaz
- Povežite uređaj: Connect an external audio device (e.g., smartphone, MP3 player) to the 3.5mm AUX input jack on the front panel using an audio cable.
- Odaberite AUX način rada: Pritisnite NAPAJANJE/REŽIM dugme dok se ne prikaže "AUX".
- Kontrolirajte reprodukciju: Control playback (play, pause, track skip) directly from your connected external device.
7. Otkrivanje problema
| Problem | Mogući uzrok | Rješenje |
|---|---|---|
| Nema struje | Pregoreni osigurač; Nepravilno ožičenje; Labava veza | Check fuse and replace if necessary; Verify all power and ground connections; Ensure wiring harness is securely connected. |
| Nema zvuka | Volume too low; Mute activated; Incorrect source selected; Speaker wires disconnected/shorted | Increase volume; Deactivate mute; Select correct audio source; Check speaker wiring for proper connection and no shorts. |
| Bluetooth se ne povezuje | Device not in pairing mode; Incorrect password; Unit not in Bluetooth mode; Interference | Ensure unit is in Bluetooth mode and discoverable; Re-attempt pairing; Check password; Move closer to the unit; Restart both devices. |
| CD/USB/SD error | Oštećen disk/file; Incorrect format; Device not properly inserted | Pokušajte s drugim diskom/file; Ensure media is in a supported format (MP3, WMA); Re-insert device securely. |
| Loš radio prijem | Antenna not connected; Damaged antenna; Weak signal area | Ensure antenna is securely connected; Check antenna for damage; Try tuning to a stronger station or move to an area with better signal. |
8. Specifikacije
- Model: MGR-208BT
- Izlazna snaga: 300 W max
- Povezivanje: Bluetooth (A2DP Streaming), CD, SD, USB, Auxiliary (3.5mm Jack)
- Radio tjuner: AM/FM with Presets
- Kompatibilni uređaji: Pametni telefon, tablet
- Posebne karakteristike: Detachable Colorful LED Lighting Faceplate, Built-in Anti-Shock technology, Preset EQ (Rock/Classic/Pop)
- Način audio izlaza: Stereo
- Konfiguracija kanala surround zvuka: 4.0
- Težina artikla: 3.52 funte
- Dimenzije paketa: 10.83 x 8.94 x 3.5 inča
9. Održavanje
- čišćenje: Koristite meku, suhu krpu za čišćenje površine uređaja. Za tvrdokornu prljavštinu, dampIsperite krpu vodom. Izbjegavajte jake hemikalije ili abrazivna sredstva za čišćenje.
- Održavanje diskova: CD-ove držite za rubove. Održavajte ih čistima i bez ogrebotina.
- Veze: Periodically check all wiring connections for corrosion or looseness, especially in marine environments.
10. Garancija i podrška
This product comes with a manufacturer's warranty. Please refer to the warranty card included in your package for specific terms and conditions. For technical support or service inquiries, please contact your retailer or the manufacturer directly. Keep your purchase receipt as proof of purchase.





