ESX QL810SP

The ESX QUANTUM QL810SP is a high-performance 10-channel digital sound processor designed for high-end car audio systems. Featuring two high-quality 32-bit DSP chips from Analog Devices, audiophile-grade AKM Velvet Sound signal converters, and a comprehensive range of features, it enables exceptionally precise sound tuning at the highest level.

Unlike conventional sound processors with only one DSP core, ESX’s QL810SP features two powerful ADAU1452 processors. These offer enormous processing power for complex sound corrections, active crossovers, and individual adjustment of all audio channels. Signal processing occurs at a sampling rate of 96 kHz, enabling high-resolution audio playback.

A particular highlight is the ESX Expert Staging Equalizer, which allows you to precisely optimize the spatial sound image using additional balance and level functions. Comprehensive equalizers, flexible input mixing, time alignment, and individually adjustable crossovers offer numerous options for professional tuning.

Thanks to its built-in Bluetooth 5.0 receiver, the QL810SP can be used for both wireless music playback and direct control via the ESX DSP Toolkit app. Settings can be adjusted in real time using a compatible smartphone or the Windows PC software. Up to eight different sound profiles can be saved and recalled as needed.

With eight analog RCA inputs, eight high-level inputs, optical and coaxial digital inputs, and ten RCA outputs, each delivering 6 volts RMS, the QL810SP offers extensive connectivity options. The built-in EPS PRO fault protection system also makes it easier to integrate the unit into modern vehicles equipped with factory-installed audio systems.

Technical Specifications

General Characteristics

• Model: ESX QUANTUM QL810SP

• Device Type: Digital Full HD Audio Sound Processor

• DSP output channels: 10

• DSP chips: 2 x Analog Devices ADAU1452

• Processor architecture: Dual-DSP, 2 x 32-bit

• DSP clock frequency: 294 MHz

• DSP processing power: 2 x 1.2 billion MAC operations per second

• Audio sampling rate: 96 kHz

• A/D converter: AKM Velvet Sound, 32-bit

• D/A converter: AKM Velvet Sound, 32-bit

• Control processor: ARM Cortex M4, 240 MHz

• Internal flash memory: 1024 kB

• Saved sound setups: 8 presets
  
  

Audio Specifications

• Frequency response: 5 – 45,000 Hz

• Analog signal-to-noise ratio: 111 dB (A-weighted)

• Digital signal-to-noise ratio: 117 dB (A-weighted)

• Analog distortion factor: less than 0.001%

• Digital distortion factor: less than 0.0004%

• Output voltage: 10 × 6 V RMS

• RCA input sensitivity: 1–6 V RMS

• High-level input sensitivity: 15–45 V RMS

• Input sensitivity (high level without internal jumper): 2–15 V RMS

• RCA input impedance: 10 kΩ

• Input resistance (high level): 10 Ω
  
  

DSP Functions and Sound Settings

• High-pass filter (HPF): Adjustable

• Low-pass filter (LPF): Adjustable

• Bandpass filter (BPF): Adjustable

• Filter slope: 6–48 dB/octave

• Runtime correction: 0–20 ms

• Runtime correction increment: 0.01 ms

• Master Gain: 0–60 dB

• Channel Gain: -20 to +6 dB

• Phase setting: Normal / Inverted

• Output equalizer: 10 x 31-band

• Input equalizer in standard mode: 10 x 31-band

• Input equalizer in Expert Mode: 6 x 31-band

• Expert Staging Equalizer: 4 x 31-band

• Equalizer Types: Parametric (PEQ), High Shelf (HSLF), Low Shelf (LSLF)

• Equalizer adjustment range: ±12 dB

• Equalizer step size: 0.5 dB

• Staging EQ: Additional balance and level controls

• Input mixer: Built-in

• Subwoofer Level Control: Built-in

• Priority Input Mode: Prioritized digital input signals

• Preset Auto Switch: Automatic switching between sound setups
  
  

Audio Inputs

• 8 x RCA inputs, balanced

• 8 high-level inputs via Molex connectors

• 1 x stereo optical digital input (S/PDIF, 24-bit / 96 kHz)

• 1 x coaxial stereo digital input (S/PDIF, 24-bit / 192 kHz)

• 1 x Bluetooth stereo audio input

• High-level inputs with EPS PRO fault protection system
  
  

Audio Outputs

• 10 x RCA Outputs

• Output voltage: 6 V RMS per channel

• Total Harmonic Distortion plus Noise (THD+N) of the outputs: less than 0.0004%
  
  

Bluetooth and Software

• Bluetooth version: 5.0

• Bluetooth profiles: A2DP, AVRCP

• Supported audio codecs: aptX, aptX Low Latency, aptX HD, AAC, SBC

• Bluetooth antenna: Included in the package

• Bluetooth Audio Streaming: Supported

• DSP Control via Smartphone: Supported

• Smartphone App: ESX DSP Toolkit for Android and iOS

• PC Software: ESX DSP Toolkit

• PC operating system: Microsoft Windows 10 or later

• Real-time sound adjustment: Supported

• USB port: USB Type B

• Remote control connection: RJ45

• Optional remote control: ESX RC-DQ with LCD display
  
  

Power Supply and Other Features

• Operating voltage: 7.5–17 V DC

• Recommended fuse rating: 3 A

• Automatic Power-On: DC / VOX / OFF

• Remote Output: REM OUT

• MODE Switch Input: Present

• EPS PRO: Integrated fault protection system for high-level connections

• Dimensions (W x H x D): 226 x 42 x 120 mm