Mono Class D Digital Amplifier

The QUANTUM QL amplifiers in the ESX Portfolio are technically the small siblings of the QUANTUM QE models. Ideally, they can be used where the installation space is very tight. They are also emission-free and, like the large QE models, have the finest Class D technology on board, which leaves nothing to be desired in terms of performance, sound quality and setting options. The QL models are also coming with the space-saving remote control.


  • Advanced Class D Technology with very high Efficiency
  • Selected and audiophile tuned Components
  • Massive Aluminum Heatsink
  • Heavy lateral Die-cast Parts
  • High Level Inputs with Error Protection System (EPS)


  • Auto Turn-On Function
  • Start/Stop Ready
  • MOSFET PWM Power Supply
  • 3-Way Protection Circuit
  • Compact Bass Remote Controller


2-Channel Class D Digital Amplifier

1 x 300/500/750 Watts RMS @ 4/2/1 Ω

Subsonic 10-40 Hz

LPF 40-150 Hz

Bass Boost 0-18 dB

Phase Shift 0-180°

Dimensions 226 x 43 x 120 mm

Efficiency up to 92%

€ 299,00

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

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