ESX QS-TWO

The ESX QUANTUM QS-TWO is an exceptionally compact 2-channel digital amplifier that, despite its small size, delivers impressive output power and outstanding sound quality. With up to 2 x 95 watts RMS at 2 ohms, this power amplifier is ideal for powerfully driving speaker systems with varying impedances.

Thanks to modern Class D technology, the QS-TWO achieves an efficiency of up to 90% and is characterized by low heat generation and economical power consumption. The solid die-cast aluminum heat sink ensures reliable heat dissipation. With a frequency range of 10 Hz to 60 kHz, the amplifier provides the ideal conditions for detailed and dynamic music reproduction, even with high-resolution audio sources.

In addition to standard stereo operation, the bridge configuration delivers 190 watts RMS into 4 ohms, making the QS-TWO suitable for driving compact subwoofers as well. For flexible integration, RCA inputs and high-level inputs with the EPS® Error Protection System are available. An automatic power-on function and start-stop compatibility simplify retrofitting in modern vehicles.

Thanks to its extremely compact design, the amplifier can be installed so that it is virtually invisible, offering an efficient way to enhance the sound quality and performance of existing car audio systems.

Technical Specifications

General Characteristics

• Model: ESX QS-TWO

• Series: QUANTUM QS NANO

• Amplifier Type: 2-Channel Digital Amplifier

• Amplifier Technology: Class D

• Number of channels: 2

• Speaker impedance: 2–8 ohms

• Bridge mode: Yes, at 4 ohms

• Efficiency: Up to 90%

• Frequency range: 10 Hz – 60,000 Hz

• Damping factor: 140

• Signal-to-noise ratio: 100 dB

• Total harmonic distortion: 0.016% at 5 watts (according to the user manual)

• Cooling: Die-cast aluminum heat sink
  
  

RMS output power at 13.8 volts

• 2 x 52 watts RMS at 4 ohms

• 2 x 95 watts RMS at 2 ohms

• 1 x 190 watts RMS bridged at 4 ohms
  
  

Crossover Networks and Filters

• High-pass filter (HPF): 80 Hz

• Low-pass filter (LPF): 80 Hz

• Slope: 12 dB/octave

• Switchable high-pass and low-pass filters
  
  

Connections and Signal Inputs

• RCA inputs: 2-channel stereo (L/R), via cable connectors

• RCA outputs: 2-channel stereo (L/R), via cable connectors

• High-level inputs: 2-channel stereo (L/R), via cable connector

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

• Input sensitivity: 220 mV – 5.4 V

• Automatic Power-On Function: VOX / DC

• Start-Stop Compatibility: Yes
  
  

Power Supply and Dimensions

• Operating voltage: 7.1–15.9 volts DC

• Required external fuse: 20 A

• Width: 90 mm

• Height: 35 mm

• Length: 70 mm