Jensen JA4B

Jensen JA4B 460W RMS 4-Channel Class-D Car Audio Compact Amplifier with DSP User Manual

Model: JA4B | Brand: Jensen

1. Prodotto finitoview

The Jensen JA4B is a compact 4-channel Class-D car audio amplifier designed to deliver powerful and clear sound. This amplifier integrates a Digital Signal Processor (DSP) for advanced audio tuning, controllable via a dedicated mobile application. Its efficient Class-D design ensures high power output with minimal heat generation, making it suitable for various vehicle installations.

Le caratteristiche principali includono:

  • Sistema DSP Jensen AMP App compatibility (Apple/Android) for comprehensive control.
  • Customizable RGB illumination for aesthetic integration.
  • Versatile input options: High Level (speaker wire) and Low Level (RCA).
  • Adjustable Bass Boost at 45 Hz for enhanced low-frequency response.
  • CTA-2006-D Certified for reliable power ratings.
Davanti view of the Jensen JA4B amplifier with the Jensen logo illuminated in blue.

Figura 1.1: Fronte view of the Jensen JA4B amplificatore, showcasing its compact design and illuminated Jensen logo.

2. Configurazione e installazione

2.1 Precauzioni di sicurezza

  • Prima di iniziare qualsiasi lavoro elettrico, scollegare il terminale negativo della batteria del veicolo.
  • Assicurarsi che tutti i cavi siano adeguatamente isolati per evitare cortocircuiti.
  • Use appropriate wire gauges as recommended in the specifications.
  • Montare il amplificatore in modo sicuro in un luogo che consenta un'adeguata ventilazione e sia protetto dall'umidità e dal calore eccessivo.

2.2 Montaggio del Amppiù vivace

Choose a mounting location that is dry, well-ventilated, and away from direct sunlight or heat sources. Secure the amplifier using the provided mounting hardware. Ensure there is sufficient space around the amplificatore per la circolazione dell'aria.

2.3 Collegamenti di cablaggio

Proper wiring is crucial for optimal performance and safety. Refer to the diagrams below for connection points.

2.3.1 Collegamenti di alimentazione e altoparlanti

Posteriore view of the Jensen JA4B amplificatore che mostra i terminali di uscita di alimentazione, terra, telecomando, fusibile e altoparlante.

Figura 2.1: Posteriore view of the Jensen JA4B amplifier, detailing the power input, fuse, and speaker output terminals.

  1. Power (BATTERY+): Connect a 4-8 AWG power wire from the amplifier to the positive terminal of the vehicle's battery. Install an in-line fuse (not supplied) within 18 inches of the battery.
  2. Terra (GND): Connect a 4-8 AWG ground wire from the amplifier to a clean, unpainted metal surface on the vehicle's chassis. Ensure a solid electrical connection.
  3. Remoto (REM): Collegare un filo di accensione remota da 18 AWG dal amplifier to the remote output of your head unit. This wire turns the amplifier acceso e spento con l'unità principale.
  4. Speaker Outputs (CH1, CH2, CH3, CH4): Connect your speakers to the corresponding output terminals. The amplifier supports 4-channel operation. Refer to your speaker's impedance for proper connection. Recommended speaker wire is 12-16 AWG.
  5. Fusibili: IL amplifier is equipped with two 25A fuses. Ensure these are correctly seated.

2.3.2 Signal Input Connections

Superiore view of the Jensen JA4B amplifier showing RCA inputs, high-level inputs, and DSP controls.

Figura 2.2: in alto view of the Jensen JA4B amplifier, illustrating the signal input options and DSP control area.

  • Low Level (RCA) Inputs: Collegare i cavi RCA dal pre-amplificatore dell'unità principaleamp uscite al amplifier's RCA inputs (CH1/CH2, CH3/CH4).
  • High Level (Speaker Wire) Inputs: If your head unit does not have RCA outputs, connect the speaker outputs from your head unit directly to the amplifier's high-level input terminals.
  • RCA Pass Through Outputs: These outputs allow you to send the audio signal to another amplifier nel tuo sistema.

3. Funzionamento del Amppiù vivace

3.1 Accensione iniziale

Once all connections are secure, reconnect the vehicle's negative battery terminal. Turn on your head unit. The amplifier should power on, indicated by the illuminated Jensen logo.

3.2 DSP App Control

The Jensen JA4B amplifier features an integrated Digital Signal Processor (DSP) that can be controlled via the Jensen DSP AMP App, available for Apple and Android devices. This app allows for precise audio tuning.

  1. Download the "Jensen DSP AMP" dall'app store del tuo dispositivo.
  2. Assicurati che amplifier è acceso.
  3. Open the app and follow the on-screen instructions to connect to your amplificatore tramite Bluetooth.
  4. Within the app, you can adjust various audio parameters, including:
    • Regolazione del guadagno: Variable from 200 mV to 6 V, allowing you to match the ampla sensibilità di ingresso del convertitore all'uscita dell'unità principale.
    • Incroci: Adjustable High-Pass and Low-Pass Crossovers (32-320 Hz) to filter frequencies for specific speakers.
    • Aumento dei bassi: Adjustable at 45 Hz to enhance bass response.
    • Equalizzazione: Fine-tune the frequency response.
    • Allineamento temporale: Adjust speaker delays for optimal sound staging.
    • Illuminazione RGB: Customize the color of the Jensen logo illumination.

4. Manutenzione

The Jensen JA4B amplifier richiede una manutenzione minima per garantire prestazioni a lungo termine.

  • Pulizia: Pulire periodicamente il ampPulire l'esterno del filtro con un panno morbido e asciutto per rimuovere polvere e detriti. Non utilizzare prodotti chimici aggressivi o detergenti abrasivi.
  • Ventilazione: Assicurarsi che il ampLe alette di raffreddamento del lificatore non siano ostruite. Un corretto flusso d'aria è essenziale per evitare il surriscaldamento.
  • Sostituzione fusibile: Se il amplifier does not power on, check the two 25A fuses located on the power input side. Replace blown fuses only with fuses of the same type and rating (25A).
  • Verifica della connessione: Occasionally inspect all wiring connections for tightness and corrosion. Loose or corroded connections can lead to poor performance or damage.

5. Risoluzione Dei Problemi

If you experience issues with your Jensen JA4B amplifier, fare riferimento ai seguenti problemi comuni e alle relative soluzioni:

ProblemaPossibile causaSoluzione
Nessun potere / Amplifier non si accende
  • Blown fuse(s).
  • Loose or incorrect power/ground/remote wiring.
  • Batteria del veicolo scarica.
  • Check and replace 25A fuses if necessary.
  • Verify all power, ground, and remote connections are secure and correctly wired. Ensure remote wire receives 12V when head unit is on.
  • Controllare il vol. della batteria del veicolotage.
Nessuna uscita audio
  • Input signal issue (RCA/High-Level).
  • Speaker wires disconnected or shorted.
  • Gain setting too low.
  • Impostazioni crossover errate.
  • Check RCA or high-level input connections from head unit. Test head unit output.
  • Verificare i collegamenti dei cavi degli altoparlanti su entrambi amplifier and speakers. Check for shorts.
  • Increase gain setting via the DSP app.
  • Adjust crossover settings in the DSP app to ensure desired frequencies are passed.
Distorted Sound / Noise
  • Gain setting too high (clipping).
  • Collegamento a terra scadente.
  • Interference from vehicle's electrical system.
  • Input signal too strong or weak.
  • Potential for system noise with certain head units (as reported by some users).
  • Reduce gain setting via the DSP app.
  • Ensure ground connection is clean, tight, and to bare metal.
  • Route power and signal cables separately. Check for faulty spark plugs, alternator, etc.
  • Adjust head unit output level or ampsensibilità di input del lifier.
  • If persistent noise, consider installing a high-quality line output converter (LOC) or ground loop isolator between the head unit and ampingressi lifier.
AmpSurriscaldamento del lifier
  • Ventilazione insufficiente.
  • Impedenza dell'altoparlante troppo bassa.
  • Excessive volume/clipping.
  • Garantire amplifier is mounted in a well-ventilated area. Clear any obstructions.
  • Verificare che l'impedenza degli altoparlanti corrisponda amplifier's capabilities (typically 2-4 ohms per channel).
  • Reduce volume or adjust gain to prevent clipping.

6. Specifiche

CaratteristicaDettaglio
Numero di modelloJA4B
Numero di canali4
Ampclasse lifierClasse D digitale
Ingressi altoparlanteHigh Level (Speaker Wire), Low Level (RCA)
IlluminazioneRGB Custom Color
Controllo dell'appYes (Jensen DSP AMP app)
IncrocioAdjustable High and Low-Pass Crossovers (32-320 Hz)
Risposta in frequenzaFrequenza di campionamento: 20 Hz – 20 kHz
Rapporto segnale/rumore70 dB(A)
Total Dynamic Power740 Watt
RisultatiRCA Pass Through
Regolazione del guadagnoVariable 200 mV ~ 6 V
Adjustable Bass BoostFrequenza 45 Hz
Alimentazione elettricaPWM MOSFET
Fuse Size and Type25 A x 2
Dimensioni (A x L x P)Dimensioni: 2.16″ x 8.38″ x 5.59″ (5.49 cm x 21.29 cm x 14.20 cm)
Recommended Power/Ground Wire4-8 AWG
Recommended Speaker Wire12 - 16 AWG
Voltage6 Volt (CC)
Peso del prodotto3.86 libbre (1.75 kg)

7. Garanzia e supporto

Warranty information for the Jensen JA4B amplifier is typically provided with the product packaging or available on the official Jensen websito. Fare riferimento al produttore website for the most current warranty terms and conditions, as well as for technical support resources.

For additional support, frequently asked questions, or to download the latest version of the Jensen DSP AMP App, visit the official Jensen support page or the Jensen Brand Store on Amazon.

Note: This manual does not include embedded videos as no relevant official product videos were available from the seller.

© 2024 Jensen. All rights reserved. Information subject to change without notice.

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