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Specifications

Page 14 of 15

THD+N 1kHz, 22Hz-22kHz BW

@1.0V out, no load

<0.002%

@1.0V out, 32 Ohm load

<0.010%

Intermodulation Distortion SMTPE/DIN 4:1 50Hz, 7kHz

@1.0V out, no load

<0.008%

@1.0V out, 32 Ohm load

<0.009%

Frequency Re/-3dB

Fs=96kHz

0.5-45.9kHz

Dynamic Range

20-22kHz bandwidth

112dB

20-22kHz bandwidth and A weighting filter

115dB

Output Noise

20-22kHz, volume=0-90

-106dBV

A weighting filter, volume = 0-90

-109dBV

20-22kHz, volume=90.5-99.5

-96dBV

A weighting filter, volume = 90.5-99.5

-98dBV

Crosstalk

100Hz

<107dB

1kHz

<98dB

20kHz

<72dB

Attenuation Range

0 to -99dB, 0.5dB steps

Channel Tracking Accuracy

+/-0.05dB

Maximum Output Level, No load

Low Power Mode

+14.1dBV (5.1V)

High Power Mode

Impedances

Headphone Output

0.08 Ohms

Line Output

47.5 Ohms

Input Lock Range

TOSLINK

44.1kHz +/-400Hz   48kHz +/-700Hz   88.2kHz +/-1200Hz   96kHz +/-1300Hz

USB

44.1, 48, 88.2, 96, 176.4, 192, 352.8, 384kHz

Power Consumption

Max, High Power mode

8.0W

Max, Low Power mode

2.5W

Dimensions

4” x 5.25” x 1.8”

Headphone Output Power

Low Power Mode

Output Power mW

Load Resistance Ohms

1 Channel Driven

2 Channels driven

4

80

22

8

140

45

16

310

90

20

350

100

32

600

175

50

560

280

300

83

83

600

40

40

High Power Mode

Load Resistance Ohms

1 Channel Driven

2 Channels driven

4

925

240

8

1800

490

16

1900

940

20

1575

1030

32

1020

950

50

680

650

300

115

115

600

57

57

+15.5dBV 

(

6.0V

)

Summary of Contents for M9XX

Page 1: ...m9XX Audiophile Headphone Amp DAC Owner s Manual Revision E 11 06 2015 Grace Design Lunatec LLC 4689 Ute Highway Longmont CO 80503 info gracedesign com www gracedesign com 1 303 823 8100 Page 1 of 15 ...

Page 2: ...ent LED 5 Volume Control top panel 5 Operation 5 Unpacking Your m9XX 5 Setting Up Your m9XX 5 Powering Up Your m9XX 5 Connecting Headphones 6 Line Output Operation 7 Volume and Mute Control 7 Crossfeed Circuitry 7 Computer Configuration 8 Installing the Windows USB driver 9 Using the Setup Menu 11 Navigating the Setup Menu 11 Setup Menu Items 11 Specifications 14 Cleaning and Maintenance 15 Warran...

Page 3: ... few operational concepts 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 Page 3 of 15 m9XX TOSLINK L R 5 0V 2A...

Page 4: ...er supply is plugged into this input the m9XX will enter High Power mode indicated by HP on the 7 segment display TOSLINK Optical Input Accepts up to 96kHz 24 bit PCM digital audio signal Automatic de emphasis equalization The m9XX setup menu contains an input select option that toggles between the USB input or the TOSLINK input See the Setup Menu section in this manual for more setup information ...

Page 5: ...igned 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 out...

Page 6: ...s mode is for connecting your mobile device iOS android to the m9XX Mobile devices generally cannot provide any power In this mode the m9XX will report that it is self powered To enter self powered mode first connect the USB cable from the external 2A DC power supply to the m9XX 2 high power DC input connector then connect your device to the m9XX 1 USB input For iOS you will need the Apple Lightni...

Page 7: ...gnal feeding the rear panel line out jacks is normalled through the right hand headphone jack This is so that if you have speakers connected to the line outputs they will mute when you plug headphones into the right hand jack If you want to hear speakers and headphones at the same time simply use the left hand jack Note that the crossfeed circuit feeds these connectors When listening to loudspeake...

Page 8: ...ency response characteristics of the head the crossfeed circuitry in the m9XX gives the brain some of the basic clues it needs and the result is a very pleasing simulation of an acoustic space while maintaining the tonality and balance of the original source Computer Configuration The m9XX computer audio connection is an asynchronous USB interface With asynchronous mode USB operation the m9XX USB ...

Page 9: ...he information pertaining to your specific OS In the event that you have any setup issues which aren t addressed by these resources feel from to contact us directly at 303 823 8100 M Friday 9 5 MST or you can email our service department service gracedesign com Installing the Windows USB driver To download the Windows driver visit our support page http www gracedesign com support support htm Under...

Page 10: ... install 4 Success 5 Connect your m9XX 6 Ready to go In USB 1 mode the m9XX will show up in the OS playback device dialog as m9XX In USB 2 mode the m9XX will show up in the OS playback device dialog as XMOS USB Audio Page 10 of 15 ...

Page 11: ...on all outputs In the Setup Menu push and release the encoder to activate deactivate crossfeed Decimal points on indicate that crossfeed is active Crossfeed OFF Crossfeed ON INPUT SOURCE SELECT Toggles between the 2 available audio inputs USB or TOSLINK In the Setup Menu push and release the encoder to select input source USB input TOSLINK input DISPLAY DIMMER MODE Turns off 7 segment display afte...

Page 12: ...y high levels of treble Will have very low levels of ringing before and after transients but is susceptible to distortion artifacts caused by high amplitude high frequency information in the program material sharp roll off minimum phase Not linear phase in the pass band Fast roll off protects against aliasing distortion from high amplitude high frequency content Best for recordings that are loud c...

Page 13: ...layed for briefly and change to indicate the incoming sample rate 44 1 kHz 48 kHz 88 2 kHz 96 kHz Because the m9XX s display is only 2 characters the higher sample rates are abbreviated as 17 176kHz 19 192kHz 35 354kHz 38 384kHz DSD rates are shown as d1 DSD64 d2 DSD128 Page 13 of 15 ...

Page 14: ...dB 0 5dB steps ChannelTracking Accuracy 0 05dB Maximum OutputLevel No load Low Power Mode 14 1dBV 5 1V High Power Mode Impedances Headphone Output 0 08 Ohms Line Output 47 5 Ohms InputLockRange TOSLINK 44 1kHz 400Hz 48kHz 700Hz 88 2kHz 1200Hz 96kHz 1300Hz USB 44 1 48 88 2 96 176 4 192 352 8 384kHz PowerConsumption Max High Power mode 8 0W Max Low Power mode 2 5W Dimensions 4 x 5 25 x 1 8 Headphone...

Page 15: ...fective workmanship without charge provided the customer has appropriate proof of purchase and that the product has its original factory serial number In order for Grace Design to provide efficient and timely warranty service it is important that you mail the completed warranty registration card enclosed with all of our products within 10 days of the original date of purchase You may also register...

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