A90 Discrete XLR 4.4 Headphone Amplifier 4 Pin Symmetrical NFCA Full Symmetrical Amplifier Discrete 9800mW x 2 Output Power 2 Gain Settings Black

Fully Discrete NFCA Module - Built-in 4 discrete NFCA modules, each of which uses 39 transistors to build a fully symmetrical structure. The A90 Discrete not only offers excellent direct current and extremely low distortion, but also stronger output power that allows the amplifier to power the low impedance headphones more easily.; 2 Gain Settings - The A90 Discrete has two gain options in which a low gain drives high-sensitivity IEMs and a high gain over full-size ears. In combination with the extremely low noise of 0.2 uVrms, even sensitive leems 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 XLR and 1 RCA stereo input, but if you work with an Ext90, they could provide a total of 4 XLR and 2 stereo RCA stereo inputs.; Headphone Amplifier & Preamp - When the A90 Discrete is in preamp mode, it can get the same high performance as in the headphone amplifier mode, and the symmetrical output impedance of 20 ohm SE and 40 ohms 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.