ESX QM500.2

The ESX QUANTUM QM500.2 is a powerful and exceptionally compact 2-channel Class D digital amplifier that combines modern amplifier technology with high efficiency and versatile applications. Measuring just 190 x 35 x 102 mm, the amplifier is ideal for space-saving installations in vehicles.

The QUANTUM QM Series is based on the proven technology of the larger ESX QUANTUM QL amplifiers and offers comparable technical features in a significantly more compact enclosure. High-quality, audiophile-grade components, an efficient MOSFET PWM power supply, and a robust aluminum heat sink ensure reliable power delivery.

With an RMS output power of 2 x 140 watts at 4 ohms or 2 x 250 watts at 2 ohms, the QM500.2 is suitable for both high-power speaker systems and for driving a subwoofer. In bridged mode, up to 500 watts RMS is available at 4 ohms.

Thanks to built-in high-level inputs with the EPS® Error Protection System and an automatic power-on function, the amplifier can be easily integrated into existing factory-installed sound systems. Adjustable high-pass and low-pass filters, as well as a band-pass function, allow for customization to match the connected speakers or subwoofers.

A compact bass-level remote control is also included, allowing for convenient adjustment of the bass level from the driver's seat.

Technical Specifications

General Characteristics

• Model: ESX QUANTUM QM500.2

• Amplifier Type: 2-Channel Digital Amplifier

• Amplifier Technology: Class D

• Number of channels: 2

• Efficiency: Up to 88%

• Power Supply: MOSFET PWM Switching Power Supply

• Heat sink: Aluminum with side panels made of cast aluminum

• Protection circuit: 3-stage protection circuit

• Start-stop capability: Yes, up to 7.5 V

• External fuse: 60 A

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

RMS Output Power at 14.4 V

• 2 x 140 watts RMS at 4 ohms

• 2 x 250 watts RMS at 2 ohms

• 1 x 500 watts RMS bridged at 4 ohms
  
  

Maximum output power at 14.4 V

• 2 x 280 watts MAX at 4 ohms

• 2 x 500 watts MAX at 2 ohms

• 1 x 1,000 watts MAX, bridged at 4 ohms
  
  

Audio Characteristics

• Frequency response (-3 dB): 10 Hz – 45,000 Hz

• Damping factor: Greater than 100

• Signal-to-noise ratio: Greater than 87 dB

• Total Harmonic Distortion plus Noise (THD+N): Less than 0.02%

• Input sensitivity: 0.2 – 5 V
  
  

Crossover Networks and Filters

• Crossover Modes: FULL / HP / LP-BP

• High-pass filter (HPF): 10–500 Hz, continuously adjustable

• Low-pass filter (LPF): 50–5,000 Hz, continuously adjustable

• Bandpass function: Yes

• Subsonic Function: Via High-Pass Filters in LP/BP Mode
  
  

Connections and Features

• RCA inputs: Stereo, via cable connectors

• High-level inputs: Yes

• EPS® Error Protection System: Yes

• Automatic power-on function: Yes, via DC offset or signal

• RCA outputs: Full-range stereo outputs

• Bass Level Remote Control: Yes

• Bass Level Remote Control Can Be Used in LP/BP Mode

• Speaker connections: Via cable connectors

• Operating Indicator: Power/Protect LED