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  5. QM-FOUR
ESX QM-FOUR 4-Channel Amplifier
SKU:  QM-FOUR
EAN:  4251476408098

1 Review

90 Watt

QM-FOUR

SKU:  QM-FOUR
EAN:  4251476408098

1 Review

Technical Highlights

  • 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.
  • More technical details
€199,00
€199,00 €199,00
5% discount with credit card
inkl. VAT , possibly plus shipping
Delivery
Jun 5, - Jun 8,
x piece
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QM-FOUR by ESX

ESX QM-FOUR is a 4-Channel Amplifier with Class D technology in an ultra-compact design. The heavy cast heat sink, automatic power-on function, and high-level inputs with Error Protection System are integrated. Start/Stop Ready, a compact bass level remote control, RCA inputs and outputs via Molex, and a clipping LED are included. HPF/LPF with 40 to 4000 Hz is available for CH1/2 and CH3/4. Bass Boost is selectable at 0, 6, or 12 dB for both channel pairs. An input selector switch allows for 2CH/4CH operation. The efficiency is up to 86 percent. The dimensions are 216 x 39 x 84 mm.

Features
  • 4-Channel Amplifier
  • Class D technology
  • Ultra-compact design
  • Heavy cast heat sink
  • Automatic power-on function
  • High-level inputs with Error Protection System (EPS)
  • Start/Stop Ready
  • Compact bass level remote control
  • RCA inputs and outputs via Molex
  • Clipping LED
  • Input selector switch 2CH/4CH
Technical Specifications
  • 4-Channel Class D Mini Digital Amplifier
  • 4 x 52 Watts RMS @ 4 Ω
  • 4 x 90 Watts RMS @ 2 Ω
  • 2 x 180 Watts 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 selector switch 2CH/4CH
  • Dimensions 216 x 39 x 84 mm
  • Efficiency up to 86%

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ESX QM-FOUR Datasheet

Open datasheet

Frequently Asked Questions about QM-FOUR

What power does the QM-FOUR Amplifier from ESX offer?

The QM-FOUR Amplifier from ESX provides an impressive power distribution of 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 power 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 energy-efficient.

Can the QM-FOUR Amplifier be installed in any vehicle?

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, allowing 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.

What type of connections does the QM-FOUR Amplifier offer?

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 integrating 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 choice between 2-channel and 4-channel inputs, increasing adaptability for various setups.

What frequency ranges can the QM-FOUR Amplifier cover?

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.

What safety features does the QM-FOUR Amplifier include?

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

How does the automatic power-on function of the QM-FOUR work?

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 especially advantageous when there are no separate control wiring present. 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 without requiring manual intervention.

How do I install the QM-FOUR in my audio system?

To install the QM-FOUR Amplifier in an audio system, follow these steps: 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 through the included Molex adapters or directly via high-level connections at the radio. Ensure that all connections are secure and tight to avoid interference or power loss. After wiring, the automatic power-on function should activate as soon as a signal is detected.

Is the QM-FOUR Amplifier compatible with a Subwoofer?

Yes, the QM-FOUR Amplifier is well-suited 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 delivering powerful, deep bass.

How does the Bass Boost affect the sound quality of the QM-FOUR Amplifier?

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 impactful bass. While the Bass Boost can increase sound fullness, it should be adjusted in harmony with other sound parameters to avoid distortion and ensure the best possible audio quality.

What advantages does Class D technology offer in the QM-FOUR?

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

Manufacturer information / responsible person

Audio Design Loudspeaker Sales GmbH
Am Breilingsweg 3
76709 Kronau
Germany

Authorized Managing Director:
Bruno Dammert

Contact: info@audiodesign.de

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