ESX QL800.8 - 8-channel digital amplifier

QL800.8

 QUANTUM  Class D amplifiers have been at the forefront of the ESX range for years. The range extends from the 4 x 300 watts RMS EISA Award-winning  QE1200.4  to 1 ohm stable monoblocks and the palm-sized  QS- TWO, which fits anywhere. The large selection allows for a wide range of possible combinations. But that's not all: ESX is now expanding the Quantum range with two additional Class D multi-channel power amplifiers, which offer a rich 6 x or 8 x 125 watts RMS at 2 ohms, top-quality sound, and state-of-the-art features.

The new models in the  QUANTUM QL  series occupy a special position in the ESX range in this context. Ideally, 6- and 8-channel amplifiers are configured so that they do not drive power-intensive 12- or 15-inch subwoofers, but rather unleash their potential in 2- or 3-way systems. ESX multi-channel amplifiers are designed to use the many channels and setting options to optimally power tweeters, midrange speakers, or low-midrange speakers. In this configuration, they then have a significantly higher power output than might be assumed at first glance – specifically, up to 160 watts RMS per channel. How is this possible? Quite simply! By actively distributing the frequency ranges across several channels or speakers in the vehicle, not all speakers ever 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, in short,  DHR  .

If you decide to use four 2-channel models instead of an 8-channel amplifier, for example, the DHR function or dynamic power gain would not be possible. This is because the power supply of the first amplifier is not capable of driving the channels of the second amplifier. From this perspective, 6- and 8-channel ESX amplifiers have a dynamic advantage in multi-channel applications.

If, for budgetary reasons, you still plan to use only one Quantum power amplifier to provide complete sound reinforcement for the vehicle, including a subwoofer, this is also no problem thanks to the features and bridgeability of all channels. It is even possible to control the bass level via a wired bass remote. For the QL800.6, we recommend bridging channels 5/6 for 250 watts of mono power. The QL800.8 can do even more, providing 2 x 250 watts RMS at 4 ohms on the bridged channels 5/6 and 7/8, including bass control, thanks to the copy function. If you want even more convenience and power, combine the new multi-channel amplifiers with a monoblock, for example.  QL800.1, which then confidently delivers up to 800 watts RMS at one ohm.

Features

• Advanced Class D technology with very high efficiency
• Dynamic Headroom technology*
• Max. DHR power per channel up to 160 watts RMS @ 2 Ω
• Selected and audiophile-tuned components
• Solid aluminum heat sink
• Heavy cast aluminum side panels
• High-level inputs with Error Protection System (EPS) 
• Automatic power-on function
• Start/Stop Ready
• MOSFET PWM power supply
• Triple protection circuit
• Compact bass level remote control

Technical specifications

• 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
•  's bandpass function (CH3/4 + CH7/8)
• Input selector switch CH2/4/6/8
• Dimensions 285 x 47 x 170 mm
• Efficiency up to 87%

* Dynamic Headroom

ESX multi-channel amplifiers use innovative Dynamic Headroom (DHR) technology to achieve higher maximum RMS output power in typical multi-channel applications. This technology really comes into its own when not all channels require full power across the entire frequency spectrum at the same time. More information in the  User Manual.