METRUM Amethyst User Manual

All-Engineering BV
https://metrumacoustics.com
info@metrumacoustics.com
NOS single ended DAC "AMETHYST "
User manual
Updated 01-01-2018
Introduction
Two DAC TWO Modules which provide plenty of processing power and substantial energy
reservoirs … to provide smooth and efficient delivery of power.

METRUM Amethyst Specifications

Power

power supply	30 VA single toroid transformer
average power consumption	8 Watts
power requirement	110/115V AC or 220/230 V AC 60/50Hz

Ports & Interfaces

inputs	1x optical Toslink, 2x RCA coaxial, 1x USB module optional
outputs	2x RCA connectors, One headphone connector
output voltage	RCA: 2 Volts RMS, Headphone: 2 Volts RMS

Audio Specifications

frequency response	1Hz -0.8dB, 20 kHz -1.5 dB 44.1kHz sampling, 1Hz -0.8dB, 65 kHz -3dB 192kHz sampling
distortion	0.007 % THD
noise floor	-145 dB related to 2 Volt RMS

Impedance

output impedance	100 Ohms RCA
headphone output impedance	3 Ohms
sampling frequency	Optical: 44 - 96 kHz, Coaxial: 44 - 192 kHz, USB: 44 -384 kHz

Weight and Dimensions

dimensions	190 x 60 x 245 mm
weight	2.5 kg

Summary

Introduction

Product Overview

Details the Amethyst DAC's processing power and energy reservoirs for smooth and efficient power delivery.

Safety Information

General Safety Instructions

Read and follow all instructions and warnings for safe operation. Clean only with a dry cloth.

Important Warnings and Terms

No user-serviceable parts inside. Use on a level surface. Agreement to terms upon product use.

Package Contents

Included Items

Lists the AMETHYST DAC, power cord, USB cable, and USB stick with user manual and drivers.

Inputs and Connections

Connection Precautions

Connect interconnects before the mains power cable for safe and optimal device setup.

Input/Output Port Details

Details optical, coaxial, and USB inputs, RCA outputs, and their respective specifications and usage.

Operation

Device States and Control Functions

Control On/Standby states, mute function, source selection, and interpret error indications via LED.

Headphone Functionality

Headphone Connection and Volume Control

Headphone connection disables rear outputs; volume control affects only headphones (16-1000 Ohms).

Technical Specifications

Performance Metrics

Details working principle, power, frequency response, distortion, noise floor, and impedance for the DAC.

Physical and Sampling Specifications

Specifies dimensions, weight, and supported sampling frequencies for optical, coaxial, and USB inputs.