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The coming years at ESX will be all about sophisticated sound tuning.  After the very successful start of the DIRECTION sound processors (EISA Award for D68SP), ESX heralds the next round with the QUANTUM QM66SP. The new 6-channel processor is integrated in a high-quality aluminum heat sink and comes up with even better standard equipment. Thanks to the integrated Bluetooth receiver, the App version of the ESX DSP Toolkit  can be used live and in real time from the smartphone - including HD Audio Streaming. The RC-DQ LCD remote control, which is available as an accessory, offers additional ease of use.


Thanks to the latest state-of-the-art analog/digital converter from AKM Velvet Sound™, the sound processing of the Analog Devices™ 32 bit/295 MHz DSP chips takes place in the full HD audio range at 96 kHz. In addition to audiophile aspects, a smooth integration into modern vehicles was also considered. EPS PRO protective circuit and high-level inputs with Auto Turn-On Function (pluggable from 1-15 V or 15-40 V via jumper) as well as symmetrical RCA low-level outputs with 6 V/RMS are standard on board. Sound tuning redefined ...

  • DSP Chip from Analog Devices™ 32 Bit, 294 MHz, Full HD Audio 96 kHz
  • Signal Converter from AKM Velvet Sound™ A/D 32 bit, D/A 32 bit
  • HPF/LPF/BP @ 6-48 dB, Phase Shift, Time Correction 0 ~ 20 ms/0.01 ms steps
  • Up to 248 output EQs, 120 input EQs (PEQ/HSLF/LSLF) +/- 12 dB, 0.5 dB steps)
  • Input Mixer, Subwoofer Controller, Preset Auto Switch, Priority Input Mode
  • Input Sensitivity: Low Level 1 ~ 6 V/RMS, High Level 1 ~ 15 or 15 ~ 45 V/RMS
  • Signal-to-noise Ratio (A-weighted): Analog Input 106 dB, Digital Input 111 dB
  • Total Harmonic Distortion: Analog Input <0.0015%, Digital Input <0.0009%
  • Integrated Bluetooth® Receiver (incl. Antenna) for DSP control via App and Fully HD Audio Streaming
    Bluetooth-Version 5.0, Profiles: A2DP/AVRCP, Codecs: aptX, aptx LL, aptX HD, AAC, SBC
  • Optional Accessories: RC-DQ (LCD remote control)


QM66SP € 449,00*

Digital 6-Channel Sound Processor


6 x RCA Input, balanced

6 x High Level Input (via Molex Connector)

1 x USB Type B for PC Software

1 x RJ45 for Remote Controller / Extension Cable

1 x Bluetooth Antenna Input

1 x Power Input incl. REM OUT and MODE switch pin



6 x RCA @ 6 V RMS



190 x 35 x 102 mm


Owner's Manual

Test Review

DSP Software


RC-DQ € 79,00*

LCD Remote Controller for QUANTUM QM66SP

Volume: Controls the overall volume of the music system

Mode: Selection of up to 8 different sound setups

Bass: Volume control for connected subwoofer


Including 5 meter cable and aluminum mounting housing


Owner's Manual

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 * Manufacturer's suggested retail price, changes and mistakes reserved