Topping A90 Discrete User Manual

Introduction

The Topping A90 Discrete is a high-performance desktop headphone amplifier. It supports balanced and unbalanced inputs and outputs, features three types of headphone interfaces, gain selection, and ground selection functions. It is designed to connect with various audio sources and headphones.

Features

High-performance desktop headphone amplifier
Supports balanced and unbalanced inputs and outputs
Three types of headphone interfaces (e.g., 4-pin XLR, 6.35mm SE, 4.4mm BAL)
Adjustable gain settings
Ground selection function
High output power: 9800mWx2 @16Ω THD+N<0.1%, 3300mWx2@16Ω THD+N<0.1%

Specifications

Detailed specifications are provided in the original document, including input/output types, power output, THD+N, SNR, frequency response, and more. For precise technical details, please refer to the original manual.

Operation

The manual outlines the operation of the A90 Discrete, including:

Volume Control: Adjusting the volume using the volume knob.
Gain Selection: Choosing the appropriate gain setting (e.g., High Gain, Low Gain) based on headphone sensitivity.
Input/Output Selection: Selecting between balanced and unbalanced inputs and outputs.
Ground Selection: Adjusting ground settings for optimal performance.

Safety Precautions

Important safety information is provided to ensure safe operation. This includes warnings against exposing the device to moisture, extreme temperatures, or attempting unauthorized repairs. Always ensure proper ventilation.

Package Contents

The typical package includes the A90 Discrete amplifier, a power adapter, a remote control, and a user manual.

Troubleshooting

Basic troubleshooting tips may be included for common issues. If problems persist, it is recommended to contact Topping customer support.

Product Diagrams and Charts

The original document contains various technical diagrams and charts illustrating performance metrics such as frequency response, distortion, and output power across different load conditions. These charts visually represent the amplifier's capabilities and are crucial for understanding its technical performance.

	Topping A90 Discrete Headphone Amplifier User Manual Comprehensive user manual for the Topping A90 Discrete Fully Discrete Balanced Headphone Amplifier, detailing its features, specifications, and operation.
	TOPPING EHA5 Electrostatic Headphone Amplifier: Performance and Specifications Explore the TOPPING EHA5, a high-performance electrostatic headphone amplifier designed to unlock the full potential of your headphones. Featuring exceptional power, low noise, and versatile connectivity.
	TOPPING PA5 II Series: High-Fidelity Compact Desktop Power Amplifiers Discover the TOPPING PA5 II and PA5 II Plus compact desktop power amplifiers. Featuring a fully balanced structure, Class D amplification, exceptional low distortion, high output power, and versatile connectivity for premium home audio experiences.
	TOPPING A50 III User Manual User manual for the TOPPING A50 III headphone amplifier, detailing its features, operation, specifications, and troubleshooting.
	TOPPING D90 III Discrete User Manual User manual for the TOPPING D90 III Discrete DAC, providing detailed information on features, operation, setup, troubleshooting, and specifications.
	TOPPING L30 II NFCA Headphone Amplifier: High Performance Audio Explore the TOPPING L30 II, a powerful NFCA headphone amplifier offering ultra-low noise, high output power, and exceptional clarity. Ideal for driving a wide range of headphones with its versatile gain settings and low output impedance.
	Topping L70 Full Balanced NFCA Headphone Amplifier User Manual Comprehensive user manual for the Topping L70 Full Balanced NFCA Headphone Amplifier, covering setup, operation, and specifications.
	Topping E70 Velvet DAC: User Manual and Specifications Comprehensive guide to the Topping E70 Velvet DAC, covering package contents, product attributes, front/rear panel descriptions, display indicators, remote control functions, operation, settings, and safety precautions.