ESX QM-ONE

The ESX QUANTUM QM-ONE is an ultra-compact mono Class D digital amplifier designed specifically to powerfully drive a separate subwoofer. Despite its exceptionally space-saving design, the monoblock delivers a remarkable output power of up to 360 watts RMS into 2 ohms.

Modern Class D technology enables high efficiency of up to 85% and ensures efficient power amplification. The solid cast heat sink supports reliable heat dissipation and allows for use even in tight installation spaces.

Thanks to its integrated high-level inputs with the ESX Error Protection System (EPS®), the QM-ONE is also suitable for retrofitting factory-installed car stereos. The automatic power-on function via DC offset simplifies integration into existing vehicle systems. In addition, RCA inputs are available for connecting to aftermarket radios or external signal processors.

With the adjustable low-pass filter, the subsonic filter, and the adjustable bass boost, you can optimize the sound output for the connected subwoofer. The included compact bass level remote control allows you to conveniently adjust the bass level from the driver's seat.

The ESX QM-ONE pairs perfectly with the ESX QM-FOUR 4-channel amplifier, allowing you to build a high-performance car audio system with minimal space requirements.

Technical Specifications

General Characteristics

• Model: ESX QUANTUM QM-ONE

• Amplifier Type: Mono Digital Amplifier

• Amplifier Class: Class D

• Number of channels: 1

• Operating voltage: 12 V vehicle electrical system

• Permissible speaker impedance: 2–8 ohms

• Efficiency: Up to 85%

• Start-stop capability: Yes

• Cooling: Solid cast heat sink
  
  

RMS Output Power at 14.4 V

• 1 × 215 watts RMS at 4 ohms

• 1 × 360 watts RMS at 2 ohms
  
  

Audio Characteristics

• Frequency response (–3 dB): 10–250 Hz

• Signal-to-noise ratio: 101 dB

• Damping factor: Greater than 300

• Total Harmonic Distortion (THD at 1 W RMS): Less than 0.02%
  
  

Crossover Networks and Filters

• Low-pass filter (LPF): 50–250 Hz, adjustable

• Subsonic filter: 10–40 Hz, adjustable

• Bass Boost: 0–12 dB, adjustable

• Bass boost frequency: 45 Hz
  
  

Connections and Input Sensitivity

• Low-level RCA inputs: Available

• High-level inputs: Available

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

• High-level connection: Via the included 4-pin cable harness

• RCA input sensitivity: 0.2–6.5 V

• Input sensitivity (high level): 0.8–15 V

• Automatic Power-On Function: Via DC Offset at the High-Level Input

• Bass Level Remote Control: Included
  
  

Power Supply and Dimensions

• Fuse: 1 × 35 A

• Width: 216 mm

• Height: 39 mm

• Depth: 84 mm

• Dimensions (W × H × D): 216 × 39 × 84 mm