Grace Design m900 Käyttöohje

Grace Design Kuulokkeet m900

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m900 Headphone Amp / DAC / Preamp
Owner’s Manual Revision A
05/06/2017
Grace Design / Lunatec LLC
4689 Ute Highway, Longmont, CO 80503
info@gracedesign.com
www.gracedesign.com
1.303.823.8100
PAGE 1
1 Welcome
The m900 represents a new level of performance for
compact, personal audio playback devices. With zero
Ohm output impedance headphone outputs and a
remarkable USB power supply design, the m900 delivers
incredible playback performance with compact, stylish
ergonomics.
Setup and operation is of the m900 simple. While
mostly plug and play, there are a few operational con-
cepts that are helpful to understand. We encourage you
to read this manual thoroughly to familiarize yourself
with the unit so you can use and enjoy it to its fullest
extent.
If you have any questions, please visit our website for
more information: www.gracedesign.com, or feel free to
call us directly at 1.303.823.8100. We’d love to hear from
you!
2 Connections and Controls
2.1 REAR PANEL
1 32 4 5
1 - Line Outputs
Unbalanced, level controlled line outputs via a pair
of gold plated RCA phono jacks. These outputs are
designed to connect to a power amp, powered speakers,
preamps, or headphone amps. When headphones are
connected to the right hand front panel jack, the line
output signal is muted.
2 - S/PDIF Input
Accepts up to 192kHz, 24 bit PCM digital audio signal.
Automatic de-emphasis equalization. The m900 setup
menu contains an input select option that toggles be-
tween the USB, S/PDIF or TOSLINK input. See the Setup
Menu section in this manual for more setup information.
3 - TOSLINK Optical Input
Accepts up to 96kHz, 24 bit PCM digital audio signal.
Automatic de-emphasis equalization. The m900 setup
menu contains an input select option that toggles be-
tween the USB, S/PDIF or TOSLINK input. See the Setup
Menu section in this manual for more setup information.
4 - USB Connector #2 - High Power Input
Use this power connection to operate the m900 in
High Power mode. This connector carries only DC power
and no USB data. Once the included low noise 2A USB
power supply is plugged into this input, the m900 will
enter High Power mode (indicated by “HP” on the 7-seg-
ment display).
5 - USB Connector #1 - Data / Signal / Bus Power Input
Asynchronous USB 2 interface for bit perfect, zero
interface induced jitter DAC operation. Accommodates
44.1kHz to 384kHz PCM and 64X - 256X DSD. Driverless
Contents
1 Welcome 1
2 Connections and Controls 1
2.1 REAR PANEL 1
2.2 FRONT PANEL 2
2.3 TOP PANEL 2
3 Operation 2
4 Using the Setup Menu 8
5 Specications 10
6 Cleaning and Maintenance 11
7 Warranty Information 11
PAGE 2
operation with MAC OS. USB Class 2 operation with
Windows up to 384kHz with from
free driver download
Grace Design. When nothing is connected to the USB
connector #2, the m900 is bus powered through this
interface and operates in Low Power mode.
2.2 FRONT PANEL
1 2
1 - Headphone Outputs
Parallel headphone outputs wired to high quality TRS
jacks. When headphones are connected to the right
hand jack, the line output signal is muted.
2 - 7 Segment LED
Displays level setting from 0 - 99. This display is also
used for navigating the m900 setup menu. The volume
control step size is 0.5dB. The right hand decimal point
comes on to indicate the 0.5dB value. For instance, “65.“
indicates a volume setting of 65.5dB.
2.3 TOP PANEL
1
1 - Volume Control
The top mounted rotary encoder provides precise,
stepped level control. Its push-button feature is used to
mute all signals (single push and release) or access the
setup menu (push and hold).
3 Operation
Unpacking Your m900
The m900 arrives in simple but protective Korrvu™
packaging. We recommend that you save this box in the
event you wish to store or ship your unit in the future.
The box will contain the m900, printed owner’s manual,
a 2A USB wall power supply and 2 USB type B mini ca-
bles – one 6’ and one 10’. If you are missing any of these
items, please contact us at 1.303.823.8100.
Setting Up Your m900
The m900 is designed to sit on your desktop or atop
your audio center. Its small, low profile stature easily
fits on any desk or media center furniture. Put your unit
wherever you like, as long as it’s within reach. The top
mounted volume control will sit comfortably under your
hand whenever you need to control your system volume,
quickly mute or change settings.
Headphone jacks are on the front and inputs and line
outs are on the back, so your cabling can remain clean
and simple.
Powering Up Your m900
There is no power switch. Power is automatically ap-
plied when either of the USB jacks are connected. If you
wish to power off the m900, simply disconnect the USB
connection.
The m900 can be powered from the your computer’s
USB Bus in Low Power mode via the #1 USB connector. In
this mode the internal supplies operate at lower voltage
to conserve power. This is useful if you are traveling and
do not have access to AC wall outlet.
If you connect the included 2A USB power supply
to the #2 USB connector, the m900 switches into High
Power mode. The #1 USB 2 port will maintain an active
connection to your computer, but no power will be
drawn from the computer port. If running in High Power
mode and the power supply is disconnected, the m900
will reboot.

Tuotetiedot

Merkki: Grace Design
Kategoria: Kuulokkeet
Malli: m900

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