1. Úvod a konecview
The ESX QUANTUM QS-FOUR is an ultra-compact 4-channel Class D amplifier designed to significantly upgrade your car audio system. This powerful yet miniature 4-channel version measures only 90 x 35 x 80 mm, making it one of the smallest amplifiers in its class. It delivers an impressive 4 x 60 Watts RMS, providing substantial power to factory or aftermarket speakers.
The QS-FOUR features exceptionally low distortion (THD+N < 0.007% at 5W/RMS) and high efficiency (up to 90%), ensuring clear and dynamic sound reproduction. Its compact size allows for flexible installation, often directly behind the dashboard, making it an ideal plug-and-play solution for vehicles. The amplifier's low current draw (5-10 Amps) means it can often utilize existing factory power cables. Additionally, the QS-FOUR includes low-level outputs for connecting active subwoofers or larger monoblock amplifiers, offering expandability for enhanced bass.

2. Bezpečnostní informace
- Always disconnect the vehicle's battery before beginning any installation work to prevent electrical shorts and damage.
- Professional installation is recommended. Incorrect wiring can cause serious damage to the amplifier, vehicle, or personal injury.
- Ensure all wiring is properly insulated and secured to prevent short circuits and vibrations.
- Neinstalujte amplifier in locations exposed to moisture, excessive heat, or direct sunlight.
- Pro připojení napájení a reproduktorů použijte kabeláž vhodného průřezu, jak je uvedeno v části o instalaci.
- Protect all power cables with an inline fuse located close to the battery.
- Vyhněte se umístění amplifier where it could obstruct vehicle controls or safety devices.
3. Obsah balení
Zkontrolujte prosím obsah balení, abyste se ujistili, že jsou všechny položky přítomny a nepoškozené:
- ESX QUANTUM QS-FOUR AmpLifikační jednotka
- High-Level Input Wiring Harness with EPS (Error Protection System)
- Power Input Wiring Harness
- Speaker Output Wiring Harness
- RCA Line-Out Cables
- Inline Fuse Holder with Fuse
- Montážní šrouby

4. Vlastnosti produktu
- Ultra kompaktní design: Dimensions of 90 x 35 x 80 mm for flexible installation.
- Vysoký výstupní výkon: 4 x 60 W RMS at 2 Ω, 4 x 45 W RMS at 3 Ω, 4 x 35 W RMS at 4 Ω, or 2 x 120 W RMS bridged at 4 Ω.
- Full Range Class D Technology: Efficient power delivery with minimal heat generation.
- Volitelné výhybkové filtry: Front and Rear Highpass/Lowpass filters switchable at 80 Hz.
- High-Level Inputs with EPS: Error Protection System for seamless integration with factory head units.
- Auto-Turn-On Function: Automatic power-on via DC offset or VOX (signal detection).
- 2-Channel RCA Line-Out: For connecting external active subwoofers or additional ampzáchranáři.
- 12V Remote Output: Provides a remote signal for other devices.
- Široká frekvenční odezva: 10 Hz až 60 kHz.
- Low Total Harmonic Distortion (THD+N): < 0.007% at 5W/RMS.
- Vysoká účinnost: Up to 90% for reduced power consumption.
5. Nastavení a instalace
5.1 Zapojení kabeláže
Before making any connections, ensure the vehicle's battery is disconnected. Refer to the diagrams below for proper wiring.
Příkon:
- + 12V: Connect to the positive terminal of the car battery via an inline fuse (not included, but a fuse holder is provided).
- GND: Connect to a solid, unpainted metal point on the vehicle chassis. Ensure a good ground connection.
- REM (dálkové): Connect to the remote output of your head unit. If using high-level inputs with Auto-Turn-On, this connection may not be necessary.
Výstup reproduktoru:
Connect your speakers to the designated terminals. Ensure correct polarity (positive to positive, negative to negative). The ampZařízení Liferier podporuje 4kanálový stereofonní nebo 2kanálový přemostěný provoz.
- FL+/FL-: Přední levý reproduktor
- FR+/FR-: Přední pravý reproduktor
- RL+/RL-: Levý zadní reproduktor
- RR+/RR-: Pravý zadní reproduktor
- Přemostěný režim: For 2-channel operation, connect the positive of the left speaker to FL+ and the negative to FR-. For the right speaker, connect positive to RL+ and negative to RR-. Refer to the manual for specific bridging instructions.

Vstupní připojení:
- Vstup na vysoké úrovni: Use the provided harness to connect to your head unit's speaker outputs. The EPS (Error Protection System) ensures compatibility with various factory systems.
- RCA Line-Out: Use the RCA cables to connect to an active subwoofer or another ampživější.

5.2 Počáteční nastavení
- Level Input (Gain): Start with the gain knobs set to minimum (MIN). Gradually increase the gain until the sound is clear and distortion-free at your desired listening volume. Avoid setting the gain too high, as this can introduce distortion.
- X-OVER (křížení):
- PLNÝ: Full range audio (no filter).
- HP (horní propust): Allows frequencies above 80 Hz to pass, typically used for full-range speakers to remove bass.
- LP (dolní propust): Allows frequencies below 80 Hz to pass, typically used for subwoofers (though this amplifier is not primarily for subwoofers, it can be used for mid-bass applications).
- AUTO TURN-ON:
- OFF: Amplifier turns on via the REM wire.
- VOX: Amplifier turns on when an audio signal is detected (signal sensing).
- DC: Amplifier turns on when a DC offset is detected on the high-level inputs (common with factory head units).
6. Návod k obsluze
Once properly installed and configured, the ESX QUANTUM QS-FOUR ampZáchranný systém pracuje automaticky s audiosystémem vašeho vozidla.
- Zapnutí/vypnutí: The amplifier will power on and off with your head unit, depending on the selected AUTO TURN-ON mode (REM, VOX, or DC). The 'POWER' LED on the rear panel will illuminate when the amplifier je aktivní.
- Přehrávání zvuku: Play audio through your head unit as usual. The amplifier will provide enhanced power and clarity to your speakers.
- Nastavení hlasitosti: Control the overall system volume using your head unit. If distortion occurs at high volumes, slightly reduce the ampnastavení zesílení zařízení Liferier.
- Režim ochrany: If the 'PROTECT' LED illuminates, the amplifier has entered protection mode due to an issue (e.g., short circuit, overheating, low voltage). Turn off your audio system and vehicle, then troubleshoot the cause before restarting.
7. Údržba
- Čištění: K čištění používejte měkký, suchý hadřík ampvnější část zvedáku. Nepoužívejte agresivní chemikálie ani abrazivní čisticí prostředky.
- Spojení: Periodically check all power, ground, and speaker connections to ensure they are secure and free from corrosion.
- Větrání: Zajistěte ampChladicí žebra zhášeče tepla nejsou zakryta, aby bylo možné správně odvádět teplo.
- Výměna pojistky: If the inline fuse blows, replace it only with a fuse of the same type and rating to prevent damage.
8. Řešení problémů
| Problém | Možná příčina | Řešení |
|---|---|---|
| Žádný zvuk z reproduktorů | Žádná síla amplifier; Incorrect input/output wiring; Head unit not sending signal; Amplifier v ochranném režimu. | Check power and ground connections; Verify remote turn-on signal; Check speaker and input wiring; Ensure head unit is on and playing audio; Check 'PROTECT' LED. |
| Zkreslený zvuk | Příliš vysoké zesílení; Nesprávné nastavení dělicí mechaniky; Nesoulad impedance reproduktorů; Poškozené reproduktory. | Reduce gain level; Adjust crossover settings; Verify speaker impedance is within amplifier's range; Test speakers individually. |
| 'PROTECT' LED is on | Short circuit in speaker wiring; Overheating; Low/high voltage; Speaker impedance too low. | Turn off system, check all speaker wires for shorts; Ensure adequate ventilation; Check vehicle's battery voltage; Verify speaker impedance. |
| Ampzvlhčovač se nezapne | No +12V power; No ground connection; No remote signal (if not using Auto-Turn-On); Blown fuse. | Check fuse, power, and ground wires; Verify remote wire connection or Auto-Turn-On setting. |
9. Specifikace
| Funkce | Specifikace |
|---|---|
| Číslo modelu | QS-FOUR |
| Kanály | 4 |
| Output Power (RMS @ 4 Ω) | 4 x 35 W |
| Output Power (RMS @ 3 Ω) | 4 x 45 W |
| Output Power (RMS @ 2 Ω) | 4 x 60 W |
| Bridged Output Power (RMS @ 4 Ω) | 2 x 120 W |
| Frekvenční odezva | 10 Hz – 60 kHz |
| Total Harmonic Distortion (THD+N @ 5W/RMS) | < 0.007 % |
| Účinnost | až 90 % |
| Výhybkové filtry | HP/LP switchable @ 80 Hz (Front/Rear) |
| Vstupní objemtage | 12V DC (Min/Max) |
| Rozměry (D x Š x V) | 90 x 80 x 35 mm (3.54 x 3.15 x 1.38 palce) |
| Typ montáže | Volné stání |
| Dodržování | CE |
10. Záruka a podpora
The ESX QUANTUM QS-FOUR amplifier comes with a manufacturer's warranty. Please refer to the warranty card included with your product or contact your authorized ESX dealer for specific warranty terms and conditions.
For technical support, installation assistance, or service inquiries, please contact your point of purchase or visit the official ESX Car-Audio webstránky s kontaktními informacemi a zdroji.