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NIIMBUS ULTIMATE Series User Manual

NIIMBUS ULTIMATE Series
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HEADPHONE AMPLIFIER
NIIMBUS ULTIMATE SERIES
HPA US 4+
USER´s MANUAL
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NIIMBUS ULTIMATE Series Specifications

General IconGeneral
Input Impedance10 kΩ
THD+N<0.01%
Total Harmonic Distortion<0.01%
Signal-to-Noise Ratio>120 dB
Damping Factor>500

Summary

Safety Warnings

High Output Level Caution

Warning about potential hearing damage from high output levels.

General Safety Instructions

Power, Grounding, and Liquid Precautions

Safety guidelines for power connection, grounding, and avoiding liquids.

Grounding Concept

Ground-Lift Jumper Settings

General and XLR Ground-Lift Configuration

Explanation of internal ground-lift jumper settings for case and XLR.

Analog Signal Connections

Power Supply and Fuse Management

Power Supply Configuration and Fuse Safety

Details on power supply, transformers, and mains fuse warnings.

System Block Circuitry

Power Switch and Input Signal Overview

Input Gain (PRE-GAIN) and Selection

PRE-GAIN DIP-Switch Settings

Configuration of input gain levels using DIP switches.

Volume, Balance, and Amplifier Function

Optimizing Input Levels with PRE-GAIN

Understanding and Applying PRE-GAIN

Guide to using PRE-GAIN for optimal audio levels and noise reduction.

PRE-GAIN Adjustment Best Practices

Recommended steps and precautions for setting PRE-GAIN.

PRE-GAIN Settings and Output Control

PRE-GAIN DIP-Switch Diagrams

Visual guide to setting PRE-GAIN levels via DIP switches.

Line Output Control and Headphone Output Details

Line Output Configurations and Gain Settings

Output Gain DIP-Switch Settings

Configuration of line output levels using DIP switches.

Line Output Modes and Error Handling

Unit Protection and Error Reporting

Description of protective circuits and error indication.

Software Settings and Menu Options

Technical Data and Specifications

Input/Output, Amplifier, and Output Level Data

Detailed technical parameters for inputs, outputs, amplifier, and output levels.

Unit Dismantling and Internal Access

Safety Warning: Disconnect Power First

Crucial instruction to unplug the unit before internal access.

Step-by-Step Dismantling Procedure

Instructions for safely opening the unit for maintenance.

Internal Settings and Jumper Configurations

Case Ground-Lift and AC Voltage Settings

Diagrams for setting case ground-lift and AC voltage selector.

Internal Settings and Jumper Configurations (Continued)

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