Aim tti qpx1200s 1200w powerflex power supply aim tti qpx1200s p the aim tti qpx1200s is a laboratory dc power supply with a maximum total output power of 1200w and is suited to both bench top and system applications p p the qpx1200s is a different type of laboratory power supply designed to meet the need for flexibility in the choice of voltage and current a conventional psu has a fixed current limit giving a power capability that reduces directly with the output voltage