Introducció
Thank you for choosing the PRV Audio QS400.4 Mini Compact 4 Channel Car Audio Amplificador. Això amplifier is designed to deliver powerful and clear audio performance in a compact form factor, ideal for various car audio setups. This manual provides essential information for proper installation, operation, and maintenance of your ampmés viu.

Imatge: Frontal view of the PRV Audio QS400.4 ampvidador, espectacleasinel seu disseny compacte i la seva marca.
Informació de seguretat
Please read all safety instructions carefully before installing and operating the amplifier. Failure to follow these guidelines may result in injury or damage to the product or vehicle.
- Desconnecteu sempre el terminal negatiu de la bateria del vehicle abans de començar qualsevol treball elèctric.
- Assegureu-vos de connectar a terra correctament per a amplifier to prevent electrical hazards and noise.
- Use appropriate gauge wiring for power, ground, and speaker connections as recommended.
- Instal·leu el amplifier in a well-ventilated area, away from direct sunlight, heat sources, and moisture.
- No muntis el amplifier where it may interfere with vehicle operation or safety devices.
- Demana ajuda professional si no tens clar quins passos d'instal·lació.
Característiques
The PRV Audio QS400.4 amplifier boasts several key features designed for optimal performance and ease of use:
- 4 x 100 Watts TRUE RMS: Certified full-range output with Digital Class D Brazilian Technology.
- 4 Channel Stability: Stable at 2 Ohm, allowing flexible speaker wiring configurations.
- Alta eficiència: Engineered for maximum efficiency to optimize vehicle electrical system usage.
- Disseny compacte: Small footprint (4″ W x 5.40″ L x 2″ H) for easy installation in various vehicle locations.
- Bridgeable Channels: Capable of 2 Channel Bridged operation for double power output (2 x 200 Watts RMS at 4 Ohms minimum impedance).

Imatge: El/La amplifier highlighting its key features: Full Range (FR), Low Pass Filter (LP), High Pass Filter (HP), Circuit Protection (CP), and Compact Design (CD).
Contingut del paquet
En obrir el paquet, assegureu-vos que hi hagi tots els elements i que estiguin en bon estat:
- PRV Audio QS400.4 Mini amplificador de cotxe compacte de 4 canals i 2 ohms Ampmés viu
- Manual d'usuari (aquest document)
- Mounting Hardware (screws, etc. - assumed, not explicitly listed in JSON but typical)

Image: The PRV Audio QS400.4 amplifier shown in its retail packaging.
Configuració i instal·lació
Una instal·lació correcta és crucial per a un rendiment òptim i una major durabilitat del vostre amplificador. Segueix aquests passos amb atenció:
1. Ubicació de muntatge
Choose a mounting location that is dry, well-ventilated, and secure. Avoid areas exposed to direct sunlight, excessive heat, or moisture. Ensure there is enough space around the ampLificador per a la circulació d'aire.
2. Connexions d'alimentació

Imatge: Primer pla view of the power input, remote, ground, and speaker output terminals on the PRV Audio QS400.4 ampmés viu.
- +12VDC (Power): Connect a fused power cable (minimum 8 AWG recommended) directly from the positive terminal of your vehicle's battery to the +12VDC terminal on the amplifier. Install a fuse holder within 18 inches of the battery.
- GND (terra): Connect a ground cable (same gauge as power cable) from the GND terminal on the ampl'adaptador a una superfície metàl·lica neta i sense pintar del xassís del vehicle. Assegureu-vos que la connexió sigui sòlida i de baixa resistència.
- REMOTE (Engegada remota): Connecteu un cable d'encesa remota des de la sortida remota de la unitat principal al terminal REMOTE del amplificador. Aquest cable indica el ampl'activador s'encén quan la unitat principal està activa.
3. Connexions d'altaveus
The QS400.4 supports both 2 Ohm per channel and 4 Ohm bridged configurations. Refer to the terminal markings on the amplifier for correct wiring.
- Standard (Stereo) Wiring: Connect each speaker to its corresponding channel output (CH1+, CH1-, CH2+, CH2-, etc.). Ensure correct polarity (+ to + and - to -). Minimum impedance is 2 Ohms per channel.
- Bridged Wiring: To bridge channels (e.g., CH1 and CH2 for a single speaker), connect the speaker's positive (+) terminal to CH1+ and the speaker's negative (-) terminal to CH2-. The amplifier supports 2 x 200 Watts RMS when bridged at a minimum impedance of 4 Ohms per bridged channel. Note: For bridged operation, both RCA inputs for the bridged channels must be connected.

Imatge: Anglesa view de la amplifier, clearly showing the power input, remote, ground, and speaker output terminals, including markings for bridged configurations.
4. RCA Input Connections

Imatge: Primer pla view of the RCA input jacks (CH1, CH2, CH3, CH4) and control knobs (Min/Max Level, Crossover switches) on the PRV Audio QS400.4 ampmés viu.
Connecteu els cables RCA des del pre-emissor de la unitat principalamp outputs to the corresponding RCA inputs on the amplifier (CH1, CH2, CH3, CH4). Ensure a secure connection to prevent signal loss or noise.
Instruccions de funcionament
1. Gain Level Adjustment (MIN/MAX LEVEL)
El control de guany coincideix amb el amplifier's input sensitivity to the output level of your head unit. Start with the gain set to minimum (fully counter-clockwise). Play a familiar track at about 75% of your head unit's maximum volume. Slowly increase the amplifier's gain until you hear distortion, then back off slightly until the sound is clear. This ensures maximum clean output.
2. Crossover Settings (HPF/LPF/OFF)
The QS400.4 features built-in crossovers to optimize sound output for different types of speakers:
- HPF (filtre de pas alt): Allows frequencies above the set point to pass through, blocking lower frequencies. Ideal for full-range speakers or tweeters to prevent distortion from bass.
- LPF (filtre de pas baix): Allows frequencies below the set point to pass through, blocking higher frequencies. Ideal for subwoofers to ensure they only reproduce bass.
- OFF (Full Range): Disables the crossover, allowing all frequencies to pass through. Use this setting if your head unit or external processor handles the crossovers.
Adjust the crossover frequency according to your speaker's specifications and desired sound. Experiment with settings to find the best balance for your system.
Manteniment
To ensure long-lasting performance from your PRV Audio QS400.4 amplifier, follow these simple maintenance tips:
- Mantenir el ampEl lificador està net i lliure de pols i restes. Feu servir un drap suau i sec per netejar-lo.
- Assegureu-vos una ventilació adequada al voltant ampNo bloquegeu les aletes de refrigeració ni les reixetes de ventilació.
- Periodically check all wiring connections for tightness and corrosion. Loose connections can cause performance issues or damage.
- Eviteu exposar el ampLifer a temperatures o humitat extremes.
Resolució de problemes
Si teniu problemes amb el vostre amplifier, consulteu els següents problemes i solucions habituals:
| Problema | Causa possible | Solució |
|---|---|---|
| Sense alimentació / AmpEl lificador no s'encén |
|
|
| Sense sortida de so |
|
|
| So distorsionat |
|
|
| Excessive Noise (Hiss, Whine) |
|
|
Especificacions
Detailed technical specifications for the PRV Audio QS400.4 ampmés viu:
| Especificació | Valor |
|---|---|
| Número de model | QS400.4 2 Ohm |
| Marca | ÀUDIO PRV |
| Nombre de canals | 4 |
| Potència de sortida (RMS) | 4 x 100 Watts RMS at 2 Ohm (400 Watts Total) |
| Bridged Output Power (RMS) | 2 x 200 Watts RMS at 4 Ohm |
| Voltage | 12 volts (CC) |
| Dimensions (L x A x A) | 5.4 x 4 x 2 polzades |
| Pes de l'article | 1.34 lliures |
| Tipus de muntatge | Muntatge en superfície |
| Color | Negre |
| UPC | 810075523898 |

Image: The PRV Audio QS400.4 amplifier with its dimensions (Depth: 5.40", Width: 4.00", Height: 2.00") clearly marked.
Garantia i Suport
For warranty information, technical support, or service inquiries, please contact PRV Audio Group directly. Refer to the product packaging or the official PRV Audio weblloc web per obtenir les dades de contacte i els termes de garantia més actualitzats.
You can visit the official PRV Audio store on Amazon for more information: PRV AUDIO Store





