ESX QE80.4 DSP

The ESX QE80.4 DSP from the QUANTUM series combines a powerful 4-channel Class-D amplifier with an integrated 8-channel digital sound processor. This combination enables precise sound optimization and flexible adaptation to a wide variety of car audio systems—from custom speaker configurations to integration into existing factory-installed sound systems.

The included X-CONTROL 2 DSP software allows you to customize a wide range of sound parameters. These include an equalizer, active crossovers, time alignment, and phase settings. You can save up to ten different sound configurations and recall them as needed.

Thanks to high-level inputs with an automatic power-on function, the amplifier is also suitable for retrofitting into factory-installed radios. Additional connection options via RCA, AUX, and an optical digital input allow for versatile integration.

The included wired remote control allows you to conveniently adjust the master volume, subwoofer level, input selection, and saved DSP settings.

The description has been rewritten based on the official ESX product page and expanded to include technical details from the ESX user manual.

Technical Specifications

Amplifier

• Model: ESX QE80.4 DSP

• Series: QUANTUM

• Amplifier Type: 4-channel digital amplifier with integrated DSP

• Circuit Technology: Class D

• Number of amplifier channels: 4

• Number of DSP channels: 8

• Operating voltage for power ratings: 13.8 V
  
  

RMS Output Power

• 4 Ω: 4 × 80 watts RMS

• 2 Ω: 4 × 125 watts RMS

• 4 Ω bridged: 2 × 250 watts RMS
  
  

Maximum Output Power

• 4 Ω: 4 × 160 watts MAX

• 2 Ω: 4 × 250 watts MAX

• 4 Ω bridged: 2 × 500 watts MAX
  
  

Additional Amplifier Specifications

• Frequency response (−3 dB): 5 Hz – 20,000 Hz

• Damping factor: over 100

• Signal-to-noise ratio: over 90 dB

• Channel separation: over 60 dB

• Total Harmonic Distortion plus Noise (THD+N): 0.05%

• Input sensitivity: 0.3–4 V

• Input impedance: over 47 kΩ

• Efficiency: up to 78%

• Fuses: 2 × 35 A
  
  

DSP Processor and Tone Control

• DSP Chip: Cirrus Logic Single-Core

• DSP resolution: 32 bits

• DSP sampling rate according to the manufacturer: 192 kHz

• DSP output channels: 8

• DSP Software: ESX X-CONTROL 2 for Windows

• Memory slots: 10 presets

• Gain adjustment: −40 to +12 dB

• Equalizer: 6 × 31-band and 2 × 11-band

• Equalizer Level Adjustment: −18 to +12 dB

• Equalizer Quality (Q-factor): 0.5 – 9

• Adjustable frequency range for channels A–F: 20–20,000 Hz

• Adjustable frequency range for channels G–H: 20–200 Hz

• Crossover Networks: High-Pass, Low-Pass, and Band-Pass

• Filter slope: 6–48 dB/octave

• Runtime correction: 0–15 ms

• Runtime correction distance: 0–510 cm

• Phase adjustment: 0° / 180°
  
  

Connections and Features

• RCA low-level inputs: 6 channels (Front L/R, Rear L/R, Sub L/R)

• High-level inputs: 6 channels via cable assembly

• RCA preamp outputs: 4 channels via cable set

• Optical Digital Input: TOSLINK / S/PDIF Stereo PCM

• Supported optical sampling rate: 12–96 kHz

• AUX input: 3.5-mm stereo jack

• USB port: Mini-USB for DSP configuration

• Automatic Power-On: Auto Turn-On via High-Level Inputs

• Remote output: +12-V power-on signal with Auto Turn-On

• Remote control: Wired with LED display

• Remote control functions: Master volume, subwoofer level, input selection, and preset selection

• Housing: Aluminum with solid cast aluminum side panels

• Dimensions according to the product page (W × H × L): 165 × 46 × 285 mm
  
  

What's Included

• 1 × ESX QE80.4 DSP Amplifier

• 1 × Wired remote control with LED display and connecting cable

• 1 × USB cable, 5 m

• 1 × High-Level Input Cable Set

• 1 × RCA output cable set with 4 RCA jacks

• 1 × X-CONTROL software CD

• 1 × User's Manual