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ESX QS-Four ISO 4-Channel Amplifier
SKU:  QS-FOUR-ISO
EAN:  4251476413665
60 Watt

QS-Four ISO

SKU:  QS-FOUR-ISO
EAN:  4251476413665

Technical Highlights

  • Class D technology, 4 x 35/45/60 watts RMS @ 4/3/2 Ω, high performance.
    At the stereo RCA output, IHPF/LPF, 120 watts RMS are supported.
    90% efficiency, distortion factor <0.0075% at 5 watts RMS.
  • More technical details
00 d
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€199,00
-12% €225,00 €199,00
5% discount with credit card
inkl. VAT , possibly plus shipping
Delivery
Jun 5, - Jun 8,
x piece
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QS-Four ISO by ESX

The QS-Four ISO from ESX is an ultra-compact 4-Channel Class D Nano Digital Amplifier. The device features a heavy cast heat sink and is equipped with an automatic power-on function. The integrated high-level inputs utilize the Error Protection System EPS. Included is an ISO Plug+Play cable set with a length of 60 cm. The amplifier is Start/Stop capable and designed for HD Audio in a frequency range of 10 Hz to 60 kHz. There are switchable HPF and LPF for front and rear, as well as RCA inputs and a stereo RCA output.

Features
  • 4-Channel Amplifier
  • Class D Nano Digital Technology
  • Heavy cast heat sink
  • Dimensions: 90 x 35 x 80 mm
  • High-level inputs with Error Protection System EPS
  • Automatic power-on function
  • Start/Stop Ready
  • ISO Plug+Play cable set (60 cm)
  • HD Audio capable
  • Stereo RCA output
  • Switchable HPF/LPF for front and rear
Technical Specifications
  • Power: 4 x 35 Watts RMS at 4 Ohms
  • Power: 4 x 45 Watts RMS at 3 Ohms
  • Power: 4 x 60 Watts RMS at 2 Ohms
  • Power: 2 x 120 Watts RMS at 4 Ohms bridged
  • Filter: 2 x HPF/LPF at 80 Hz
  • THD+N distortion at 5W/RMS: less than 0.007 percent
  • Frequency range: 10 Hz to 60 kHz
  • Efficiency: up to 90 percent

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ESX QS-Four ISO Datasheet

Open datasheet

Frequently Asked Questions about QS-Four ISO

What are the key performance specifications of the QS-Four ISO Amplifier?

The ESX QS-Four ISO impresses as a 4-channel Class D Nano Digital Amplifier with remarkable performance specifications. It delivers 4 x 35/45/60 Watts RMS at 4/3/2 Ohms, allowing flexibility with various speaker configurations. Additionally, it offers 2 x 120 Watts RMS in bridged mode at 4 Ohms. The maximum output power significantly optimizes audio quality, even in challenging installations. The frequency range of 10 Hz to 60 kHz highlights its ability to reproduce both deep bass and high frequencies accurately. The efficiency of up to 90% also ensures effective use of the supplied power.

What installation options does the QS-Four ISO from ESX offer?

Thanks to its ultra-compact dimensions of 90 x 35 x 80 mm, the QS-Four ISO can be installed almost anywhere in the vehicle. The ISO Plug+Play cable set, with a length of 60 cm, greatly simplifies installation. The RCA inputs and the stereo RCA output for active Subwoofers significantly expand connection options. The automatic turn-on function and the high-level inputs with Error Protection System (EPS®) also contribute to easy integration into existing systems. The massive cast heat sink ensures optimal heat dissipation, making flexible placement of the amplifier easier without risking overheating.

What crossovers are present in the QS-Four ISO?

The ESX QS-Four ISO features switchable high-pass (HPF) and low-pass filters (LPF) with a fixed frequency of 80 Hz for front and rear channels. These filters are ideal for directing bass to Subwoofers or low-frequency speakers while higher frequencies are transmitted to midrange or Tweeters. This allows for targeted control of frequency distribution, significantly improving overall sound quality in the vehicle. At the same time, the amplifier is kept within its optimal operating range, promoting the longevity of the system.

To what extent is the QS-Four ISO start-stop capable?

The ESX QS-Four ISO is start-stop capable, meaning it does not experience power losses when the engine automatically shuts off in stop-and-go traffic situations. This feature is crucial for modern vehicles with start-stop technology, as the amplifier restarts without delays as soon as the engine is turned back on. This functionality keeps audio quality consistent, regardless of engine activity, while also ensuring energy-efficient operation of the amplifier by minimizing power consumption during inactivity.

How efficiently does the QS-Four ISO amplifier operate?

With an impressive efficiency of up to 90%, the ESX QS-Four ISO amplifier sets standards in energy efficiency. Such a high efficiency means that a large portion of the supplied energy is directly converted into audio power, while only a minimal amount is lost as heat. This is particularly advantageous for mobile applications, as the energy consumption preserves the vehicle's battery. This efficiency is achieved through innovative Class D circuit technology, which uses highly efficient circuits to optimally utilize available electronic resources.

Can the QS-Four ISO amplifier process high-resolution audio files?

Yes, the ESX QS-Four ISO is optimized for high-resolution audio files. With a frequency range of 10 Hz to 60 kHz, this amplifier is well-equipped for HD audio playback. This wide frequency coverage allows for the precise representation of both the lowest and highest frequencies that can occur in high-resolution audio tracks. The extremely low total harmonic distortion of less than 0.007% THD+N at 5 W/RMS ensures interference-free audio output, providing the richness and authenticity that modern audio enthusiasts expect from top-tier sound systems.

How does the Error Protection System (EPS®) improve the high-level inputs?

The Error Protection System (EPS®) in the high-level inputs of the ESX QS-Four ISO amplifier protects against clipping and potential damage from unexpected voltage spikes or faulty input signals. This system continuously monitors the signal levels and intervenes when they fall outside safe operating ranges. Overall, EPS® enhances the reliability and longevity of the amplifier by ensuring that only suitable signals are passed through. This protective feature is particularly useful in demanding audio applications, where consistent high performance is essential.

Is the QS-Four ISO Amplifier compatible with active Subwoofers?

Yes, the ESX QS-Four ISO Amplifier features a stereo RCA output specifically designed for connecting to active Subwoofers. This expansion option allows for a significant increase in the bass capabilities of the audio system without burdening the main channels. The RCA outputs ensure perfect signal transmission with minimal loss and help to fully utilize the potential of Subwoofers. The amplifier can be seamlessly integrated into existing audio systems, making it the optimal choice for enthusiasts of deep, powerful bass.

Is it possible to connect the QS-Four ISO Amplifier losslessly?

The ESX QS-Four ISO offers a lossless connection experience primarily through its RCA inputs, which guarantee a direct, interference-free connection. These connection options are crucial for high-quality signal compatibility and promise minimal losses during audio transmission. The design of the RCA inputs also allows for flexible connections with a variety of sources and protects against interference that can occur from loose cable connections. Suitable RCA cables and adapted connectors enhance the efficiency of signal transmission and maximize sound quality when listening to music.

What thermal properties does the QS-Four ISO Amplifier have?

The thermal properties of the ESX QS-Four ISO are optimized by the heavy cast heat sink, which ensures effective heat dissipation. This construction allows the amplifier to cool efficiently during operation and prevents overheating even under intense use. The powerful cooling is essential to ensure the longevity and performance reliability of the amplifier in various installation environments. The design also simplifies installation in smaller spaces where heat dissipation is limited, without compromising functionality or audio quality.

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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