Topping A90 Discrete Headphone Amplifier 4-Pin-XLR 4.4 Symmetrical NFCA Fully Discrete Symmetrical Amplifier 9800 mW x 2 Output Power 2 Amplification Settings Black

Completely Discrete NFCA Module - Built-in 4 discrete NFCA modules, each of which uses 39 transistors to build a completely symmetrical structure. The A90 Discrete not only offers excellent DC current and extremely low distortions, but also stronger output power, allowing the amplifier to drive low-impedance headphones even easier. ^^ 2 Amplification Settings - The A90 Discrete features two amplification options, where low amplification drives high-sensitivity IEMs and high amplification drives full-size over-ear headphones. In combination with the extremely low noise of 0.2 uVrms, even sensitive lEMs do not suffer from noise.

^^ Ground Loop Noise Terminator - A90 Discrete adds a GND/LIFT switch to eliminate ground loop noise. Set it to GND in normal use; and if ground loop noise occurs, switch to LIFT. Then noise from the ground loop is removed. ^^ XLR & RCA Stereo Inputs The A90 Discrete gives you 1 x XLR stereo input and 1 x RCA stereo input, but if you work with an Ext90, they could provide a total of 4 x XLR stereo inputs and 2 x RCA stereo inputs. ^^ Headphone Amplifier & Preamp - When the A90 Discrete is in preamp mode, it can get the same high performance as in headphone amplifier mode, and the SE 20ohm and symmetric 40ohm output impedance are suitable for different power amplifiers.

When used as a headphone amplifier, it can be used with the D90SE / D9OLE DAC. When used as a preamplifier, it can be used with the LA90.