Features: Twin SABRE DACs (ES9018K2M) and amplifiers (9601K) are laid out symmetrically and served by separate capacitors. Connect your headphones via 2.5 mm (3/32") 4-pole output to enable Balanced Audio Output with both DACs and amps employed simultaneously. Two modes are available: BTL, to increase driving power, and ACG mode for enhanced stability. Both modes offer a tangible increase in headroom and spatial dimensionality. Whether used in balanced or unbalanced mode, transparent audio reproduction gives insight and dynamic response you just can't experience with a smartphone.