Introducing the Topping A90 Discrete Balanced Headphone Amplifier and Preamp in black. This powerful and versatile analogue headphone amplifier features top-quality connectivity options, including 1 x 2x RCA Phono (L/R), 2 x XLR, and 1 x 4.4mm Headphone Output, giving you the flexibility to connect to a variety of devices. With a chipset/manufacturer like Topping, you can trust that this headphone amplifier is designed for high-quality sound and durability.