Topping A90 Discrete Fully Discrete Balanced Headphone Amplifier, HiFi NFCA 4Pin XLR/4.4mm Balanced/6.35mm SE Out 9800mWx2 Desktop Headphone Amp Preamplifier (Silver)

Product description TOPPING A90 Discrete Balanced Headphone Amp NFCA 4Pin XLR 4.4MM Balanced 6.35MM SE Output 9800mW x 2 Preamplifier with Remote Control & 2 Gain Control The A90 Discrete is the discrete component version of the TOPPING A90 headphone amp. Contains almost all functions of TOPPING A90 and Pre90. In addition to using discrete components to form an amplifier circuit, the
following functions are added: 1. Greater output power. 2. Use the relay to control the volume and support many custom settings of the volume. 3. Support remote control for more convenient to use. 4. The A90 Discrete provide 1 x XLR and 1 x RCA stereo inputs, but when it working with TOPPING Ext90, they could provide totally 4 x XLR and 2 x RCA stereo inputs. 5. Add the ground loop cut-off switch to solve the ground loop noise problem. 6. Added 12V TRIGGER function, which can be switched on and off synchronously with other devices with the same interface. A90 Discrete uses fully discrete components to redesign the NFCA 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. The output capability is stronger than ever, which allows the amp driving low impedance headphones more effective.
Machine Size: 16X 22.2X 4.5 cm
Accessories: 1 X TOPPING A90 Discrete 1 X Remote Control 1 X AC Cable 1 X 6.35 to 3.5 mm Adaptor 1 X User Manual 1 X TOPPING Card High output voltage and current, low output impedance. Compatible with most headphones. 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 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 0.2 uVrms ultra-low noise, even sensitive IEMs will not suffer from any noise. A90 Discrete Is Also Served As a Preamp In preamp mode, it get the same high performance as the headphone amp mode, and 20ohm SE and 40ohm balanced output impedance are widely suitable for various amplifiers. A90Discrete 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. The full-featured remote control makes it more convenient to use. The Terminator Of Ground Loop Noise Ground loop noise may be encountered when multiple devices are used in combination. A90Discrete 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. HPA+DAC TOPPING Set The A90 Discrete can be used with the TOPPING D90SE/D90LE DAC, which is almost the lowest distortion HPA+DAC combination.

Preamp for TOPPING LA90 The A90 Discrete can also be used as the preamp of the TOPPING LA90, providing more precise volume control, remote control and additional input. Use with EXT90 to Get More Inputs The A90 Discrete provide 1 x XLR and 1 x RCA stereo inputs, but when it working with TOPPING Ext90, they could provide totally 4 x XLR and 2 x RCA stereo inputs. 12V Trigger Function The A90 Discrete is equipped with a 12V Trigger interface, which can be set to active control (Trigger out) or passive control (Trigger in). With only one easy-to-obtain 3.5 mm to 3.5 mm cable. the A90 Discrete can be turned on and off synchronously with other devices equipped with a 12v Trigger interface. A90 Discrete can set to memorizes the output or input volume Memorizing the output volume means the A90 Discrete will memorized