Einführung
This manual provides detailed instructions for the installation, operation, and maintenance of the Soundstream MPQ-6BX 1/2 DIN 5-Band Car Audio Equalizer with Digital Bass Reconstruction. Please read this manual thoroughly before using the product to ensure proper function and to prevent damage.
Sicherheitshinweise
- Stromversorgung: Ensure the unit is connected to a 12V DC negative ground power supply.
- Verdrahtung: All wiring should be performed with the vehicle's ignition turned off to prevent electrical shorts.
- Montage: Mount the unit securely to prevent movement during vehicle operation. Avoid mounting in locations exposed to direct sunlight, excessive heat, or moisture.
- Belüftung: Sorgen Sie für ausreichende Belüftung rund um das Gerät, um eine Überhitzung zu vermeiden.
- Professionelle Installation: Wenn Sie sich bei einzelnen Installationsschritten unsicher sind, wenden Sie sich an einen qualifizierten Car-Audio-Fachmann.
Produkt überview
The Soundstream MPQ-6BX is a compact 1/2 DIN 5-band equalizer designed to enhance your car audio system. It features digital bass reconstruction, a selectable subsonic filter, and flexible input/output options for comprehensive sound control.
Hauptmerkmale:
- 5-Band-Equalizer: Provides ±18 dB adjustment at 50 Hz, 200 Hz, 1 kHz, 5 kHz, and 20 kHz for precise frequency tuning.
- Digital Bass Reconstruction: Restores low frequencies often lost during audio compression, enhancing bass impact.
- Unterschallfilter: Selectable 35–80Hz filter protects subwoofers from unwanted ultra-low frequencies.
- Vielseitige Eingänge: Includes AUX, low-level RCA, and high-level speaker inputs for compatibility with various head units.
- High Output PreampReiniger: Delivers 7V RMS / 12V peak preamplifier outputs with ultra-low 0.01% Total Harmonic Distortion (THD) and a 110 dB Signal-to-Noise Ratio (SNR).
- Kompaktes Design: 1/2 DIN size (7" W x 5.1" D x 1.2" H) for easy installation in tight spaces.

Abbildung 1: Schräg view of the Soundstream MPQ-6BX equalizer.
Setup und Installation
Proper installation is crucial for optimal performance. Refer to the wiring diagram and follow these steps carefully.
Packungsinhalt:

Figure 2: Included components: MPQ-6BX equalizer, remote knob, and installation accessories.
- Soundstream MPQ-6BX Equalizer
- Bassregler mit Fernbedienung
- Installation Accessories (wiring harness, mounting hardware)
- Bedienungsanleitung
Montage:
- Choose a suitable location in your vehicle, such as a 1/2 DIN dash opening or under the dashboard, ensuring it is away from heat sources and moisture.
- Ensure there is enough space for wiring connections and ventilation.
- Befestigen Sie das Gerät mit dem mitgelieferten Montagematerial.
Kabelverbindungen:

Figure 3: Rear panel connections for power, inputs, and outputs.
- Stromanschluss:
- Verbinden Sie +12V wire to a constant 12V power source (e.g., battery positive terminal) with an inline fuse.
- Verbinden Sie Masse wire to a clean chassis ground point.
- Verbinden Sie REM (Remote) wire to the remote turn-on output of your head unit.
- Eingangsanschlüsse:
- AUX-Eingang: For external audio devices via RCA.
- Low-Level-Cinch-Eingang: Connect to the RCA pre-out of your head unit.
- High-Level Speaker Input: Use for head units without RCA outputs. Connect directly to speaker wires.
- Ausgangsverbindungen:
- Verbinden Sie FRONT, HINTER, Und Untertitel RCA outputs to the corresponding inputs on your amplifizierer.
Bedienungsanleitung
Familiarize yourself with the controls to optimize your audio experience.

Figure 4: Front panel controls of the MPQ-6BX equalizer.
Bedienelemente auf der Vorderseite:
- Master-Lautstärke: Adjusts the overall output level of the equalizer.
- Eingangsauswahl: Switches between CD (Low-Level RCA/High-Level) and AUX inputs.
- Fader (F/R): Balances the audio output between front and rear channels.
- Level (Digital Bass Processor): Adjusts the intensity of the digital bass reconstruction.
- Subsonic (35Hz/80Hz): Selects the cutoff frequency for the subsonic filter.
- EQ Bands (50Hz, 200Hz, 1kHz, 5kHz, 20kHz): Adjusts the gain (±18dB) for each frequency band.
Rear Panel Settings:

Abbildung 5: Oben view showing input level, ground isolation, and output voltage-Schalter.
- Input Level (90Hz/150Hz/200Hz): Adjusts the input sensitivity for the digital bass processor. Experiment to find the best setting for your source.
- Ground Isolation (200Ω/GND/ISO): Helps eliminate ground loop noise. Try different settings if you experience hum or hiss.
- Ausgangsvolumentage (5 V/7.5 V/10 V): Sets the maximum output voltage der voramplifier. Match this to the input sensitivity of your amplifizierer.
Wartung
The Soundstream MPQ-6BX is designed for reliable operation with minimal maintenance.
- Reinigung: Reinigen Sie das Gerät mit einem weichen, trockenen Tuch. Verwenden Sie keine Scheuermittel oder Lösungsmittel.
- Verbindungen: Überprüfen Sie regelmäßig alle Kabelverbindungen, um sicherzustellen, dass sie sicher und korrosionsfrei sind.
- Umfeld: Ensure the unit remains in a well-ventilated area, free from excessive heat, dust, and moisture.
Fehlerbehebung
| Problem | Mögliche Ursache | Lösung |
|---|---|---|
| Kein Strom | Durchgebrannte Sicherung, falsche Verkabelung, lockere Stromverbindung. | Check inline fuse, verify +12V, GND, and REM connections. Ensure connections are secure. |
| Keine Audioausgabe | Falsche Eingangswahl, lose Cinch-Verbindungen ampVerstärker nicht eingeschaltet. | Verify Input Select switch position. Check all RCA connections. Ensure ampDie Verstärker sind eingeschaltet. |
| Verzerrter Ton | Input level too high, output voltage mismatch, EQ settings too extreme. | Reduce head unit volume. Adjust Input Level and Output Voltage switches. Reset EQ bands to flat and adjust gradually. |
| Engine noise/hum | Ground loop, poor ground connection. | Ensure a clean, secure ground connection. Experiment with the Ground Isolation switch (200Ω/GND/ISO). |
| Schwacher Bass | Digital Bass Processor level too low, Subsonic filter set too high, EQ bass band reduced. | Increase Digital Bass Processor Level. Adjust Subsonic filter to a lower frequency or off. Increase 50Hz EQ band. |
Technische Daten
| Modellnummer | MPQ-6BX |
| Equalizer-Bänder | 5 (50Hz, 200Hz, 1kHz, 5kHz, 20kHz) |
| EQ-Einstellbereich | ±18 dB |
| Unterschallfilter | Selectable 35Hz - 80Hz |
| Max. Ausgangslautstärketage | 7V RMS / 12V Peak |
| Gesamte harmonische Verzerrung (THD) | 0.01 % |
| Signal-Rausch-Verhältnis (SNR) | 110 dB |
| Eingangsimpedanz | 20 kΩ (AUX/Low-Level), 60 Ω (High-Level) |
| Ausgangsimpedanz | 150 Ω |
| Frequenzgang | 20 Hz – 20 kHz |
| Stromversorgung | 12V DC Negative Ground, PWM Switched |
| Stromverbrauch | 250 mA |
| Abmessungen (B x T x H) | 7" x 5.1" x 1.2" (17.78 cm x 12.95 cm x 3.05 cm) |
| Gewicht | 1.7 kg |
Garantie und Support
For warranty information and technical support, please refer to the warranty card included with your product or visit the official Soundstream webBewahren Sie Ihren Kaufbeleg als Kaufnachweis für Garantieansprüche auf.
Soundstream Official WebWebsite: www.soundstream.com