ESX QL800.8 8 channel amplifier


Compact QUANTUM amplifiers in Class D technology have been the spearhead of the ESX range for years. The range extends from the 4 x 300 watt RMS QE1200.4, which won an EISA award, to 1 ohm stable monoblocks, to the tiny QS-TWO, which can fit anywhere. The large selection allows many possible combinations. But that’s not all: ESX is now expanding the Quantum range with two more Class D multi-channel power amplifiers, which offer a whopping 6 x or 8 x 125 watts RMS at 2 ohms, top sound and the most modern features.



In this context, the new models of the QUANTUM QL series occupy a special position in the ESX range. Ideally, 6- and 8-channel amplifiers are configured so that they do not drive power-intensive 12- or 15-inch subwoofers, but rather develop their potential on 2- or 3-way systems. ESX multi-channel power amplifiers are designed to use the many channels and setting options to optimally supply tweeters, midrange speakers or woofers. In this configuration, they have significantly higher performance than might be assumed at first glance – specifically up to 160 watts RMS per channel. How is that possible? Very easy! By actively distributing the frequency ranges across multiple channels or speakers in the vehicle, all speakers never play at full power at the same time. In this case, the amplifier uses the power reserves of the generous power supply, which all channels can access if necessary. ESX calls this feature Dynamic Headroom Technology, or DHR for short.
If you decide to use, for example, four 2-channel models instead of an 8-channel amplifier, the DHR function or the dynamic performance gain would not be possible. This is because the power supply of the first amplifier is not able to also drive the channels of the second amplifier. Seen this way, 6- and 8-channel ESX amplifiers have a dynamic advantage in multi-channel applications.
If, for budget reasons, you still plan to provide a complete sound system for the vehicle, including a subwoofer, with just one Quantum power amplifier, this is also no problem thanks to the equipment and the ability to bridge all channels. It’s even possible. Control the bass level via a wired bass remote. We recommend the bridge of channels 5/6 with 250 watts of mono power for the QL800.6. The QL800.8 can do even more, thanks to the copy function it can provide 2 x 250 watts RMS at 4 ohms on the bridged channels 5/6 and 7/8 including bass control. If you want even more comfort and performance, you can combine the new multi-channel amps with a monoblock QL800.1, for example, which then confidently delivers up to 800 watts RMS per ohm.
  • Advanced Class D Technology with very high Efficiency
  • Dynamic Headroom Technology*
  • Max. DHR Output Power per Channel up to 160 Watts RMS @ 2 Ω
  • Selected and audiophile tuned Components
  • Massive Aluminum Heatsink
  • Heavy lateral Die-cast Parts
  • High Level Inputs with Error Protection System (EPS)


  • Auto Turn-On Function
  • Start/Stop Ready
  • MOSFET PWM Power Supply
  • 3-Way Protection Circuit
  • Compact Bass Remote Controller


8-Channel Class D Digital Amplifier

8 x 80/125 Watts RMS @ 4/2 Ω

4 x 250 Watts RMS @ 4 Ω bridged

HPF 50-5000 Hz (CH1/2 + CH5/6)

HPF 10-500 Hz (CH3/4 + CH7/8)

LPF 50-5000 Hz (CH3/4 + CH7/8)

Copy-Mode CH7/8 > CH5/6
RCA Inputs via Molex
RCA Outputs via Molex

Bandpass Function  (CH3/4 + CH7/8)

Input Selector CH2/4/6/8

Dimensions 285 x 47 x 170 mm

Efficiency up to 87%


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ESX QL800.8 8 channel amplifier