ESX QL800.6

The ESX QL800.6 from the QUANTUM series is a powerful 6-channel digital amplifier that combines modern Class D technology with high sound quality and versatile adjustment options. With an output power of 6 × 125 watts RMS at 2 ohms, this power amplifier is particularly well-suited for high-end car audio systems and the fully active operation of 2-way and 3-way speaker systems.

One notable feature is the Dynamic Headroom Technology (DHR) developed by ESX. It allows the power reserves of the shared power supply to be utilized specifically for dynamic music signals. As a result, under suitable operating conditions, individual channels can briefly deliver up to 160 watts RMS into a 2-ohm load.

Thanks to the flexibly adjustable high-pass, low-pass, and band-pass filters, the individual speakers can be optimally tuned to their respective frequency ranges. Alternatively, the channels can be bridged—for example, to power a subwoofer with up to 250 watts RMS at 4 ohms in addition to the front and rear speakers.

Features include high-level inputs with an EPS protection system, an automatic power-on function, and a wired bass-level remote control. The solid aluminum heat sink with die-cast aluminum side panels ensures effective heat dissipation. Despite its extensive features, the QL800.6 impresses with its compact dimensions and an efficiency of up to 90%.

Technical Specifications

General Characteristics

• Manufacturer: ESX

• Model: QL800.6

• Series: QUANTUM QL

• Amplifier Type: 6-channel digital amplifier

• Amplifier Class: Class D

• Number of channels: 6

• Operating voltage: 12 V vehicle electrical system

• Power Supply: MOSFET PWM

• Efficiency: Up to 90%

• Bridgeable operation: Yes

• Dynamic Headroom Technology (DHR): Yes
  
  

RMS output power at 14.4 V

• 4 ohms: 6 × 80 watts RMS

• 2 ohms: 6 × 125 watts RMS

• 4 ohms bridged: 3 × 250 watts RMS
  
  

Maximum DHR Output Power

• 4 ohms: Up to 90 watts RMS per channel

• 2 ohms: Up to 160 watts RMS per channel

• 4 ohms bridged: Up to 320 watts RMS per pair of channels
  
  

Acoustic and Electrical Properties

• Frequency response (-3 dB): 5 – 55,000 Hz

• Signal-to-noise ratio: Greater than 93 dB

• Total Harmonic Distortion (THD): Less than 0.01%

• Damping factor: Greater than 220 (manufacturer's specification)

• Input sensitivity: 0.2 – 5 V
  
  

Crossover Filters, Channels 1/2

• Operating Modes: Full / High-Pass

• High-pass filter (HPF): 50 – 5,000 Hz
  
  

Crossover Channels 3/4

• Operating Modes: Full / High-Pass / Low-Pass / Band-Pass

• High-pass filter (HPF): 10–500 Hz

• Low-pass filter (LPF): 50–5,000 Hz

• Bandpass mode: Yes
  
  

Crossover Channels 5/6

• Operating Modes: Full / High-Pass / Low-Pass / Band-Pass

• High-pass filter (HPF): 10–500 Hz

• Low-pass filter (LPF): 50–5,000 Hz

• Bandpass mode: Yes

• Bass level adjustable via remote control
  
  

Connections and Features

• 6 × RCA low-level inputs via the included Molex cable connector

• 6 × high-level inputs via the included Molex cable connector

• High-level inputs with EPS (Error Protection System)

• Automatic power-on function via DC offset or signal detection (VOX)

• Input selector switch for 2-, 4-, or 6-channel input signals

• Wired Bass Level Remote Control

• Start-stop capable

• Triple Protection Circuit

• Internal fuse protection: 2 × 30 A
  
  

Dimensions

• Width: 254 mm

• Height: 47 mm

• Depth: 170 mm

• Housing: Solid aluminum heat sink

• Side panels: Die-cast aluminum
  
  

Special Features

• High-quality, carefully selected, and acoustically tuned components

• High power reserves for fully active speaker systems

• Flexible channel allocation for different system configurations

• Three bridgeable channel pairs

• Compact design for space-saving installation