ESX QM-FOUR 4-channel amplifier

Name: ESX QM-FOUR 4-Channel Amplifier | Masori
Brand: ESX
Price: 199.0 EUR
Availability: InStock
Rating: 5.0 (1 reviews)

1 Review

Max, Mikael and 53k+ customers already with Masori sound upgrade

ESX QM-FOUR 4-channel amplifier

1 Review

Power: 360 watts RMS, impedance: 4/2 Ω, ultra-compact design.
HPF/LPF from 40-4000 Hz, Bass Boost: 0/6/12 dB, Clipping LED.
Start/Stop Ready, Error Protection System, 86% efficiency.
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€199,00

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QM-FOUR by ESX

Discover the 4-channel amplifier QM-FOUR from ESX, a powerhouse that impresses with its use of modern Class D technology, offering excellent performance and efficiency. This device, perfectly suited for 4-channel applications, is known for its robust output of 360 watts RMS. With features like a sturdy cast heat sink, automatic turn-on function, and high-level inputs with Error Protection System, this compact masterpiece excels in every way. Whether you're looking for a partner for a separate subwoofer or an addition to your existing setup, the QM-FOUR provides you with top features and outstanding sound.

properties

Efficient Class D amplifier with ultra-compact dimensions
Heavy cast heat sink with optimal cooling properties
Automatic power-on function
High-level inputs with Error Protection System (EPS)
Start/Stop Ready
Compact bass level remote control
Cinch Inputs & Outputs (via Molex)
Clipping LED

Technical Data

4-Channel Class D Mini Digital Amplifier
4 x 52/90 Watt RMS @ 4/2 Ω
2 x 180 Watt RMS @ 4 Ω bridged
HPF/LPF 40 - 4000 Hz (CH1/2)
HPF/LPF 40 - 4000 Hz (CH3/4)
Bass Boost 0 / 6 / 12 dB (CH1/2)
Bass Boost 0 / 6 / 12 dB (CH3/4)
Input selection switch 2CH/4CH
Dimensions 216 x 39 x 84 mm
Efficiency up to 86%

ESX QM-FOUR Datenblatt

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Frequent questions about QM-FOUR

Welche Leistung bietet der QM-FOUR Verstärker von ESX?

The QM-FOUR amplifier from ESX offers an impressive power distribution with 4 x 52 watts RMS at 4 ohms and 4 x 90 watts RMS at 2 ohms. When bridged, the amplifier delivers 2 x 180 watts RMS at 4 ohms. With an efficiency of up to 86%, the QM-FOUR is particularly efficient. These performance specifications make it the perfect companion for anyone who appreciates clear and powerful sounds in their audio system. The use of modern Class D technology ensures that the amplifier is not only powerful but also operates energy-efficiently.

Kann der QM-FOUR Verstärker in jedem Fahrzeug eingebaut werden?

Yes, the QM-FOUR amplifier can be installed in most vehicles due to its ultra-compact design. With dimensions of 216 x 39 x 84 mm, it can be flexibly placed, even in tight spaces. The reinforced cast heat sink ensures optimal heat dissipation, which also allows for installation in less ventilated areas. Thanks to its Start/Stop Ready function, the QM-FOUR is also ideally suited for modern vehicles that use this technology. However, make sure there is enough space for ventilation.

Welche Art von Anschlüssen bietet der QM-FOUR Verstärker?

The QM-FOUR amplifier is equipped with RCA inputs and outputs that are connected via Molex connectors. These connection options provide flexibility and easy installation, especially when it comes to integration with existing audio systems. Additionally, the amplifier features high-level inputs with an Error Protection System (EPS) to prevent potential damage from overload. An input selector switch allows for the selection between 2-channel and 4-channel inputs, increasing adaptability for various setups.

Welche Frequenzbereiche kann der QM-FOUR Verstärker abdecken?

The QM-FOUR amplifier offers flexible frequency ranges covered by the integrated high-pass (HPF) and low-pass filters (LPF). These filters extend between 40 and 4000 Hz for both channels 1/2 and channels 3/4. These adjustment options allow the user to customize the sound and achieve an optimal listening experience. Additionally, the amplifier features a bass boost that can be adjusted in increments of 0 dB, 6 dB, and 12 dB to enhance the deep bass according to personal preference.

Welche Sicherheitsmerkmale enthält der QM-FOUR Verstärker?

The QM-FOUR amplifier features an integrated Error Protection System (EPS) that protects the electronics by detecting and preventing potential malfunctions or overloads. This protective measure is particularly useful for high-level inputs. Additionally, the amplifier is equipped with a clipping LED that visually indicates when the audio signal is distorted. This helps users to calibrate the performance correctly to ensure clean and distortion-free sound reproduction. These safety features contribute to the longevity and reliability of the amplifier.

Wie funktioniert die automatische Einschaltfunktion des QM-FOUR?

The automatic power-on function of the QM-FOUR amplifier makes operation very user-friendly. It allows the amplifier to turn on automatically as soon as an audio signal is detected. This is particularly advantageous when no separate control wiring is available. With high-level inputs, the amplifier can be connected directly to the speaker outputs of the radio, simplifying installation. The integration of this function facilitates daily use and ensures seamless readiness for operation without the need for manual intervention.

Wie installiere ich den QM-FOUR in meinem Audiosystem?

To install the QM-FOUR amplifier in an audio system, several steps must be followed: Start by properly placing the amplifier, considering its dimensions of 216 x 39 x 84 mm. Mount it in a well-ventilated area to ensure adequate cooling. The RCA connections can be made either via the included Molex adapters or directly through high-level connections at the radio. Ensure that all connections are correct and secure to avoid interference or power loss. After wiring, the automatic power-on function should activate as soon as a signal is detected.

Ist der QM-FOUR Verstärker mit einem Subwoofer kompatibel?

Yes, the QM-FOUR amplifier is indeed suitable for use in a subwoofer setup. Thanks to its 2 x 180 watts RMS power at 4 ohms in bridged mode, it can provide enough power for most subwoofer speakers. The flexibility in frequency adjustment through the HPF/LPF filters allows for precise tuning of the subwoofer sound to individual needs. Thus, the QM-FOUR is more than capable of integrating a subwoofer into your existing audio system and providing strong, deep bass.

Wie beeinflusst der Bass Boost die Klangqualität des QM-FOUR Verstärkers?

The bass boost of the QM-FOUR amplifier, adjustable in levels of 0 dB, 6 dB, and 12 dB, offers significant control over bass reproduction. This feature allows users to enhance the low-frequency sounds of their audio system to their liking. Especially if you enjoy listening to music loudly, you can use the bass boost to create powerful bass. While the bass boost can increase the fullness of the sound, it should be adjusted in harmony with the other sound parameters to avoid distortion and ensure the best possible audio quality.

Welche Vorteile bietet die Class D Technologie im QM-FOUR?

The Class D technology used in the QM-FOUR amplifier offers many advantages. Primarily, the high efficiency is in the foreground, which reaches up to 86% in this model. By minimizing heat losses, a compact design is made possible, which facilitates both design and placement. Another plus point is the lower power consumption, which makes the amplifier ideal for use in fuel-efficient or electric vehicles. This technology also contributes to extending the lifespan of the amplifier by reducing overheating and ensuring consistent performance.

Herstellerinformation/verantwortliche Person

Audio Design Loudspeaker Sales GmbH
Am Breilingsweg 3
76709 Kronau
Germany

Authorized Managing Director:
Bruno Dammert

Contact: info@audiodesign.de

Let customers speak for us

from 9059 reviews

Jean François Tedesco

Alpine tube 12 bazooka , Un sacré caisson de basses ,

Un sacré caisson de basses , j'ai eu un 46 cm killer 454 de l'époque année 90 , qui tapait vraiment bien , mais ce tube est bien plus fort et plus ample, toutes les basses passent sans problème, avec une télécommande à réglage multiples taramps eq bass , et un ampli Machete de masori , le couple est parfait, personnellement j'en ai deux tubes et ça donne énormément, avec l'ampli 2 x 530 en 4 ohms . Parfois le plus simple est bien meilleur et plus durable .

SWT-12S4

11/29/2025

Bartosz Erber

X-10 v3 d2

Hallo. Sehr freundlicher Kundenservice und schnelle Auftragsabwicklung. Der Lautsprecher ist brandneu und unbenutzt. Ich habe ihn vor einiger Zeit gekauft, aber erst kürzlich das Gehäuse fertiggestellt. Die Parameter entsprechen den Herstellerangaben: 42,5 Liter Nettovolumen, abgestimmt auf 32 Hz und 21 mm starkes Sperrholz. Ich hatte noch nie einen 10-Zoll-Lautsprecher und wusste nicht, was mich erwartet, aber das Ergebnis hat meine kühnsten Erwartungen übertroffen. Der Bass aus einem so kleinen Lautsprecher in einem so kleinen Gehäuse ist einfach unglaublich. Um den X-10 zu kaufen, habe ich meinen DD 712f in einem 70-Liter-Gehäuse verkauft, und der war ein Volltreffer. Der Sundown ist in jeder Hinsicht besser. Ich kann diesen Lautsprecher und den Händler, bei dem ich ihn gekauft habe, wärmstens empfehlen. Beste Grüße.

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11/18/2025

tatazz

Est arrivé à la maison très rapidement

Est arrivé à la maison très rapidement 👌🏽

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11/13/2025

Anonym

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Geht echt gut und leicht zum einstellen

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Georges, Alexander, Vainohoarii NAGLE

Très satisfaisant.

Bonjour, je reçu le colis bien emballé.
Je recommande vivement, la livraison est gratuite et rapide, je recommanderai sûrement encore chez Masori.

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11/10/2025

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Bought again

Bought again. Great price, fast delivery, nice !

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Perfect sound, I bough 2 pairs for the door and

Perfect sound, I bough 2 pairs for the door and the difference between these and the stock ones are huge

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Deaf bonce

Très bonne qualité
Envoie rapide et soigné
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Ich habe den Woofer in meinem Skoda Octavia 3 mit Canton Soundsystem eingebaut.
Der Einbau war Plug & Play, alles passt perfekt ohne Anpassungen.
Im Vergleich zum originalen Canton Subwoofer spielt dieser deutlich stärker, präziser und mit mehr Druck.
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