B-Grade ESX QM66SP

B-Grade Description:
Manufacturing defect: The DSP circuitry is housed in the ESX D66SP enclosure, but the internal components (circuitry) are from the QM66SP. Otherwise, the item is brand-new and unused, and is delivered complete and in its original packaging

Following the highly successful launch of the DIRECTION sound processors (EISA Award for the D68SP), ESX is ushering in the next generation with the QUANTUM QM66SP. The new 6-channel processor is integrated into a high-quality aluminum heat sink and offers even better standard features. Thanks to the built-in Bluetooth receiver, the app version of the ESX DSP Toolkit can be used live and in real time from a smartphone—HD audio streaming included. The RC-DQ LCD remote control, available as an accessory, offers even greater ease of use.

Thanks to state-of-the-art analog-to-digital converters from AKM Velvet Sound™, the Analog Devices™ 32-bit/295 MHz DSP chips process audio in the Full HD range at 96 kHz. In addition to audiophile features, consideration was also given to seamless integration into modern vehicles. EPS PRO protection circuitry and high-level inputs with an automatic power-on function (selectable via jumper from 1–15 V or 15–40 V), as well as balanced RCA low-level outputs with 6 V/RMS, are included as standard. Sound tuning redefined

Technical Specifications:

• Digital Full HD Audio 6-Channel Sound Processor

• Analog Devices 32-bit DSP

• DSP clock frequency: 294 MHz

• DSP Architecture: 48 channels

• Computing power: up to 1.2 billion MAC operations per second

• Sampling rate: 96 kHz

• Frequency response: 10 Hz – 44,000 Hz

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

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

• DSP Control via the ESX DSP Toolkit

• PC software for Microsoft Windows 10 or later

• Control via the ESX DSP Toolkit app for iOS and Android

• 8 memory slots for different sound presets

• Freely Configurable Input Mixer

• Built-in subwoofer volume control

• Priority Input Mode for Digital Signal Sources

• Auto Preset Switch via MODE Switch Input
  
  

DSP Functions:

• High-pass filter (HP)

• Low-pass filter (LP)

• Bandpass Filter (BP)

• Adjustable filter slope: 6–48 dB

• Runtime correction: 0–20 ms

• Runtime correction in 0.01-ms increments

• Master Gain: 0–60 dB

• Channel Gain: -20 to +6 dB

• Phase setting: Normal / inverted

• 6 x 31-band output equalizer

• Equalizer Types: PEQ, High-Shelf, and Low-Shelf

• EQ adjustment range: ±12 dB

• EQ level steps: 0.5 dB

• Standard Mode: 8 x 15-band input equalizer

• Expert Mode: 4 x 30-band input equalizer
  
  

Analog Inputs:

• 6 balanced RCA inputs

• 6 high-level inputs via cable connectors

• RCA input sensitivity: 1–6 V

• High-level input sensitivity with internal jumper: 15–45 V

• High-level input sensitivity without internal jumper: 2–15 V

• RCA input impedance: 10 kΩ

• High-level input resistance: 10 Ω

• Automatic Power-On Function: DC / VOX / OFF

• EPS PRO Fault Protection System for Integration into OEM Systems
  
  

Digital & Bluetooth Inputs:

• 1 x stereo optical S/PDIF input

• S/PDIF support according to the user manual: up to 192 kHz / 24-bit

• 1 Bluetooth stereo input

• Bluetooth version: 5.0

• Bluetooth Profiles: A2DP / AVRCP

• Supported Bluetooth codecs: aptX, aptX LL, aptX HD, AAC, and SBC

• Bluetooth Audio Streaming

• DSP Control via Bluetooth App

• Bluetooth antenna included
  
  

Outputs & Connections:

• 6 x RCA outputs

• Output voltage: 6 V RMS

• REM OUT for powering external components

• MODE switch input for automatic preset change

• 1 x USB Type B for connecting to the PC software

• 1 x RJ45 connector for remote control or extension cable

• Optionally compatible with the ESX RC-DQ LCD remote control
  
  

Audio Specifications:

• Signal-to-noise ratio of analog input: 106 dB (A-weighted)

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

• Analog input distortion factor: < 0.0015%

• Digital input distortion factor: < 0.0009%

• Operating voltage: 7.5 – 17 V

• Recommended fuse rating: 3 A

• Fuse not included

• Dimensions (L x H x W): 190 x 35 x 102 mm
  
  

The ESX QM66SP is particularly well-suited for high-end car audio systems where the goal is to retain the factory radio while extensively optimizing the audio signal. The combination of high-level integration, a digital input, Bluetooth streaming, and extensive DSP functions enables both classic multi-way systems and custom-tuned OEM upgrades.