1. Introduction
The NVX XDSP28 is an advanced 8-channel Digital Signal Processor (DSP) designed to enhance your car audio system. It features a 15-band parametric equalizer, adjustable high and low-pass filters, and various crossover types for precise sound customization. With 2 RCA inputs and 8 RCA outputs, built-in Bluetooth for audio streaming, and a remote level controller, the XDSP28 provides comprehensive control over your vehicle's sound environment. This manual provides detailed instructions for installation, operation, and troubleshooting to ensure optimal performance of your device.
2. Consignes de sécurité
- Lisez attentivement toutes les instructions avant l'installation et l'utilisation.
- Disconnect the vehicle's negative battery terminal before making any electrical connections.
- Assurez-vous d'une bonne mise à la terre pour éviter les risques électriques.
- N’exposez pas l’appareil à l’humidité ou à des températures extrêmes.
- Fixez solidement l'appareil pour éviter tout mouvement pendant le fonctionnement du véhicule.
- Consultez un installateur audio automobile professionnel si vous avez des doutes sur les étapes d'installation.
3. Contenu du colis
Vérifiez que tous les éléments sont présents dans le colis :
- NVX XDSP28 Digital Signal Processor Unit
- Remote Level Controller with Cable
- Manuel d'utilisation
- Matériel de montage (vis, etc.)
4. Produit terminéview
Familiarize yourself with the components and controls of the NVX XDSP28.
Figure 4.1: NVX XDSP28 Front Panel with Labeled Components
- Remote Out Sequencer: Activates other devices in sequence through a remote connection.
- Entrée à distance (REM IN): Tourne le amplifier on automatically with the radio or player.
- Ground Connector (GND): Connect to the battery's negative terminal.
- Positive Power Connector (+BAT): Connect to the battery's positive terminal.
- Écran LCD : Displays information and allows interaction with the processor.
- Commande principale : A rotating knob to adjust processor system settings and navigate menus.
- Input LED Indicator: Shows when the channel's limiter is active or output is saturated.
- Remote Level Input: Connects the external remote level controller. Controls all eight outputs simultaneously.
- Audio Input (Inputs A, B): Independent RCA connectors for channels A and B.
- Audio Output (Outputs 1-8): RCA connectors for outputting processed audio.
- Indicateur LED de sortie : Signals when the input signal is at maximum level.
- Output Select: Quickly press to adjust output channels or hold to mute.
Figure 4.2 : Haut view of the NVX XDSP28 unit, showing the main control knob, LCD display, and input/output connections.
Figure 4.3 : Arrière view of the NVX XDSP28, highlighting the power and remote connections.
Figure 4.4: The remote level controller for the NVX XDSP28, used for simultaneous output control.
5. Configuration et installation
Une installation correcte est essentielle pour un fonctionnement optimal. Suivez attentivement ces étapes :
- Montage: Select a secure, dry location in your vehicle, away from heat sources and moisture. Use the provided mounting hardware to firmly attach the DSP unit.
- Connexions d'alimentation :
- Connectez le +BAT terminal to the vehicle's positive battery terminal (or a constant 12V source) using appropriate gauge wire and an inline fuse (not included).
- Connectez le Terre terminal to a clean, unpainted metal surface on the vehicle chassis, ensuring a solid ground connection.
- Connectez le REM DANS terminal to the remote turn-on output of your head unit or ignition switch.
- Connexions d'entrée audio : Connectez les sorties RCA de votre autoradio à Inputs A et B on the XDSP28.
- Connexions de sortie audio : Connectez le Sorties 1-8 of the XDSP28 to the RCA inputs of your amplifiers. Ensure correct channel assignment for your speaker configuration.
- Remote Level Controller: Plug the remote level controller cable into the TÉLÉCOMMANDE port on the DSP unit. Mount the controller in an accessible location for easy adjustment.
- Mise sous tension initiale : Reconnect the vehicle's negative battery terminal. The DSP should power on, and the LCD display will illuminate.
6. Fonctionnement
The NVX XDSP28 offers extensive control over your audio system. All settings are adjusted via the Main Control knob and the LCD display.
6.1 Navigation dans les menus
- Faites pivoter le Contrôle principal Bouton permettant de parcourir les options du menu.
- Appuyez sur le Contrôle principal knob to select an option or confirm a setting.
- Appuyez et maintenez enfoncé le Contrôle principal knob to exit a menu or return to the previous screen.
6.2 Égalisation (EQ)
The XDSP28 features a 15-band parametric equalizer for precise frequency adjustments.
- Graphic EQ Presets: Select from 12 pre-defined graphic equalization presets such as Rock, Hip Hop, Pop, Vocal, and more.
- Égaliseur paramétrique: Manually adjust gain, frequency, and Q-factor for each of the 15 bands on both input and output channels.
6.3 Crossover Function
Configure high-pass and low-pass filters for each output channel to optimize speaker performance.
- Adjust cut frequencies for high-pass and low-pass filters.
- Select various crossover types and filter slopes (e.g., Butterworth, Linkwitz-Riley).
6.4 Time Alignment and Phase
Achieve perfect sound staging by adjusting the delay for each output channel.
- Adjust time delays in 0.02 ms increments.
- Set phase adjustments to 0° or 180° for each output.
6.5 Independent Gain and Limiter
- Independent Gain: Adjust the gain level for each output channel individually.
- Limiteur: The integrated Limiter with Dynamic Attack-Release system protects your amplifiers and speakers from over-excursion and clipping.
6.6 Générateur audio
Utilize the built-in audio tone generator for precise tuning and system diagnostics.
- Generate frequency sweeps.
- Generate pink noise for RTA (Real-Time Analyzer) measurements.
6.7 Connectivité Bluetooth
The XDSP28 features built-in Bluetooth for wireless audio streaming from your mobile device.
- Pair your device with the XDSP28 via Bluetooth settings on your phone.
- Bluetooth is for audio playback only; it does not support app-based control of DSP settings.
6.8 Remote Level Controller
The external remote level controller allows for convenient, simultaneous adjustment of all eight output levels.
7. Entretien
- Keep the unit clean and free of dust. Use a soft, dry cloth for cleaning.
- Évitez d’utiliser des produits chimiques agressifs ou des nettoyants abrasifs.
- Assurez-vous que toutes les connexions restent bien fixées. Vérifiez régulièrement le câblage afin de déceler tout signe d'usure ou de dommage.
8. Dépannage
| Problème | Cause possible | Solution |
|---|---|---|
| No power to the DSP. | Incorrect power wiring; Blown fuse; Loose ground connection. | Check +BAT, GND, and REM IN connections. Verify fuse integrity. Ensure a solid ground connection. |
| Aucune sortie audio. | Incorrect input/output connections; DSP muted; Amplifier not powered on; Incorrect source selection. | Verify all RCA connections. Check DSP mute status (Output Select button). Ensure amplifiers are receiving remote turn-on signal. Confirm correct input source (A, B, or A+B). |
| Qualité sonore déformée ou médiocre. | Incorrect EQ settings; Improper crossover settings; Input signal too high/low; Limiter engaged excessively. | Adjust EQ settings. Review crossover frequencies and slopes. Check input gain levels. Monitor Input LED indicators for clipping. |
| Problèmes de connexion Bluetooth. | Appareil non en mode appariement ; Interférences ; Déjà connecté à un autre appareil. | Ensure Bluetooth is enabled on your device and the DSP. Disconnect from other Bluetooth devices. Move closer to the DSP. |
| Main Control knob is overly sensitive. | Characteristic of the control mechanism. | Exercise caution and precision when rotating and pressing the knob for menu navigation and setting adjustments. |
| Remote Level Controller causes input glitches. | Potential unit-specific issue or interference. | Ensure the remote cable is securely connected and not damaged. If issues persist, try operating without the remote controller to isolate the problem. Contact support if necessary. |
9. Spécifications
| Fonctionnalité | Spécification |
|---|---|
| Modèle | NVX XDSP28 |
| Nombre de canaux | 8 (Sortie) |
| Canaux d'entrée | 2 RCA |
| Canaux de sortie | 8 RCA (up to 2 Volts output) |
| Égaliseur | Égaliseur paramétrique à 15 bandes |
| Signal-to-Noise Ratio | > 94 dB |
| Distorsion harmonique totale (THD) | 0.01% |
| Time Adjustment Increments | 0.02 ms |
| Réglage de phase | 0° ou 180° |
| Graphic EQ Presets | 12 (Rock, Hip Hop, Pop, Vocal, etc.) |
| Volume d'alimentation minimaltage | 10 volts (CC) |
| Vol d'approvisionnement maximaltage | 16 volts (CC) |
| Dimensions (L x l x H) | 7.87" x 3.98" x 1.46" (200 mm x 101 mm x 37 mm) |
| Poids de l'article | 0.7 kilogrammes |
| Bluetooth | Built-in (for audio streaming) |
| Remote Level Controller | Included, for simultaneous output control |
10. Garantie et assistance
NVX products are designed for reliability and performance. For specific warranty details, please refer to the warranty card included with your product or contact the retailer where the product was purchased. Keep your proof of purchase for warranty claims.
For technical assistance, troubleshooting beyond this manual, or service inquiries, please contact NVX customer support or the authorized dealer. Contact information can typically be found on the manufacturer's official websur le site ou auprès de votre détaillant.