KGUSS Topping A90 Discrete NFCA Headphone Amplifier Preamplifier 6.35mm/4.4mm Balanced/4-Pin-XLR Headphone Output R2R Relay Volume Control (Silver)

KGUSS Topping A90 Discrete NFCA Headphone Amplifier Preamplifier 6.35mm/4.4mm Balanced/4-Pin-XLR Headphone Output R2R Relay Volume Control (Silver)

►Fully discrete NFCA also create wonderful amp► A90 Discrete uses fully discrete components to redesign the NFCA (Nested Feedback Composite Amplifier)module. 4 built-in NFCA-Discrete modules which each them uses 39 transistors build up fully balanced structure. The optimized Voltage Current hybrid feedback architecture along with UHGF (Ultra High Gain Feedback) technology provide excellent DC and AC performance. ►High output voltage, high current, low output impedance, no headphones that can't be dealt with►High output voltage can easily drive high impedance headphones; High output current allows low-sensitivity headphones to obtain enough power; The low output impedance will not bring unnecessary effect on FR when driving low-impedance headphones. Different headphones can be easily driven by the A90 Discrete. ►2 Gain settings► The A90 Discrete has two gain options, which are enough to cover a wide variety of headphones: low gain to drive the IEMs with high sensitivity, and high gain to drive full-sized over-ears. Combined with the 0.2uVrms ultra-low noise, even sensitive lEMs will not suffer from any noise. ►Ground Loop Noise Terminator► Ground loop noise may be encountered when multiple devices are used in combination. A90 Discrete adds a GND/LIFT switch to solve this problem. When in normal use, set it to GND; and when ground loop noise is encountered, switch it to LIFT. Then the ground loop noise is eliminated. ►A Headphone Amp, also a Preamp► When it is in preamp mode, you can get the same high performance as the headphone amp mode, and the 20ohm SE and 40ohm balanced output impedance are widely suitable for various power amplifiers. A90 Discrete can not only switch between the headphone amp (only output from the headphone jack) and the preamp(only output from RCA and XLR), but also support the output from all at the same time.
Topping A90D Headphone Amplifier & Preamp for Various Audio Players. 🆗A90 discrete is a high performance desktop headphone amplifier that supports unbalanced and balanced inputs and outputs. 🆗It is equipped with 2 gain settings, ground lift and 3 types of headphone jacks. A90 discrete is compatible with common headphone jacks, including 4-Pin-XLR, 4.4mm balanced, 6.35mm SE. 🆗It can be connected to various audio players or mobile phones to process and amplify their audio signals to improve audio quality and power. 🆗High output voltage, high current, low output impedance, no headphones that can't be dealt with. 🆗In addition to the high output power, the A90 Discrete can maintain ultra-low distortion output under high power load.

Attribute

Measured: 22.2cm x 16.0cm x 4.5cm.

Weight: 1.25kg.

Power input: 100-240VAC 50Hz/60Hz.

Gain: L / H.

Signal input:
1 x XLR (L+R)
1 x RCA (L+R)
1 x EXT

Headphone Amplifier output:
1 x 6.35mm headphone output jack
1 x 4-PIN-XLR headphone output jack
1 x 4.4mm headphone output jack

Line Out output:
1 x XLR (L+R)
1 x RCA (L+R)

Volume range: 0-99

Indicator: White LED

Standby power consumption: