ESX QL800.4 - 4 Channel Amplifier





  • 4-Channel Class D Digital Amplifier
  • 4 x 125/200 Watts RMS @ 4/2 Ω
  • 2 x 400 Watts RMS @ 4 Ω bridged
  • HPF 50-5000 Hz (CH1/2)
  • HPF 10-500 Hz (CH3/4)
  • LPF 50-5000 Hz (CH3/4)
  • Copy Mode CH3/4 > CH1/2
  • Bass Boost 0-12 dB
  • Bandpass Function
  • Input Selector
  • Dimensions 226 x 43 x 120 mm
  • Efficiency up to 86%


  • 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


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

Payment & Security

Apple Pay Diners Club Discover Google Pay Mastercard PayPal Shop Pay Union Pay Visa

Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.

Estimate shipping

You may also like

Recently viewed