OldSchoolStereo - #flashback to 1997 and the ESX Quantum series amplifiers and speakers. Amps designed by Zed Audio and are still highly desirable by the “Zed Heads”. They were not around for
ESX QM-TWO - 2-Channel Class D Mini Digital Amplifier 480 ...
ESX SXE100.4 Class A/B Analog 4 Channel Amplifier 800 Wattmax, 400 Watt RMS | eBay
ESX SXE1000.5 - 5 Channel Class A/B & D Hybrid Amplifier 1000 Watt RMS | eBay