Furutech ADL GT40 Installation guide

GT40 USB DAC Q & A
2010.10.21
Q1. Computer does not recognize the GT40
A1-1. Not connected correctly
（Refer to manual and check if the GT40 is connected correctly to the computer via USB cable.）
A1-2. There is a problem with a USB Hub
( Furutech does not recommend the use of a Hub when connecting the GT40 to a computer. )
A1-3. Computer does not recognize the GT40 as both the playback and recording USB device
（Disconnect the USB cable and reconnect after 10 seconds. If it still does not recognize the GT40 restart
the computer.）
Q2.System error occurs when switching between settings on the GT40
A2. Switching between settings during playback
（There is a small possibility of an OS system error when switching between settings on the GT40 during playback.
Avoid switching during playback.）
Q3.There is no sound
A3-1. The sound has been muted
（Open the volume control tab on the computer and unselect mute.）
A3-2. Volume output setting is too low
（Open the volume control tab on the computer and set the volume to maximum.）
A3-3. Another device is set as the default playback device
（Open the Sound and Audio Device properties tab and select USB Audio Device GT40 USB DAC as default
playback device.）
A3-4. There is a problem with the external amp or speakers
（Check the connection between external components and the GT40 LINE OUT RCA jacks.）
Q4. No sound from computer internal speakers
A4. USB device is set as the default for playback
（When the GT40 is selected as default audio device for playback, there will be no sound from the computer
speakers which is perfectly normal.）
Q5. No sound through headphones
A5. The volume is set too low on the GT40
（Adjust the volume on the front of the GT40 to the appropriate level）
( When adjusting volume level for headphones the Line Out RCA jack’s volume level is also adjusted. )
Q6. Uneven sound balance during playback
A6-1. Balance is not set a neutral
（Open the volume control tab on the computer and set the balance to neutral – centered.）
A6-2. There is a balance problem with the external amp or speakers
（Check the balance settings on external components.）

Q7. No sound from CD’s in the CD-ROM drive
A7. CD-ROM drive does not have digital output
（If the system does not stream digital output from the CD-ROM drive、then there will not be sound output via USB.
CD-ROM drives and CD transports must be connected to the LINE IN RCA jacks for listening with headphones. )
Q8. No sound via LINE IN RCA jacks
A8-1. Check that the connections are correct
（Check the connection between external components and the Phono/Line Input. If there are no problems with the
external components, then check the cable connection.）
A8-2. There is no sound output from external components
（Check if there is sound output from external components.）
A8-3. The selector switch on the front of the GT40 lights up green
（If the selector switch is green, the computer is set as the sound source via USB.）
A8-4. Incorrect setting of the rear panel Input Selector Switch
（
Phono
（
MC
）・
Phono (MM)
・
Line
）
（Select the appropriate setting for your analog input source.）
Q9. Not able to record
A9-1. Another device is set as the default recording device
（Open the Sound and Audio Device properties tab and select USB Audio Device GT40 USB DAC as the default
recording device.）
A9-2. Check that connections are correct
（Check the connection between external components and the Phono/Line Input. If there is no problem with the
external components, then check the cable connections.）
A9-3. Check if recording software (not supplied with GT40) recognizes the GT40 as the default recording
device
※Recording software is required to record using the GT40.
Q-10. Sound cuts out
A10-1. During playback or recording the computer’s CPU overloads
（Especially during recording make sure all other computer applications are closed.）
A10-2. During playback or recording another USB device is connected to the computer
（The sound will cut out during playback or recording if another USB device is connected to the computer.）
A10-3. CPU is unable to process data fast enough
（If the CPU does not meet the required specifications the expected results may not occur. If the CPU meets the
requirements, but the sound cuts out, close all other applications or adjust settings in the recording software）
Q11. Noise and interference
A11-1. The GT40 is placed too near appliances with strong magnetic fields like TVs
（Place at a distance from appliances with strong magnetic field ）
A11-2. Connections are not correct
（Check all terminals for correct connection）
ADL GT40 FAQ

Q: Is the ADL GT40 volume control digital or analog
A: Analog
Q: Can the headphone amplifier be used with the analog inputs
A: Yes
Q: Can the ADL GT40 be used as a preamplifier
A: The GT40 has been designed to work with a preamp, but it puts out enough voltage to be paired with an amp and
sensitive speakers and used directly with its high quality volume control
Q: How should the volume control on the ADL GT40 be set when paired with a preamplifier?
A: Volume on the GT40 should be set to max and volume adjusted on the preamp.