VentureCraft Go-Dap TT User manual
User's Guide
Headphone Amplifier
Tube Headphone Ampli er
CONTENTS
■ Features of this Product _________________________________ 2
■ Contents of Package ___________________________________ 3
■
Compatible Models of iPod/iPhone and PC (OS)_________________3
■ How to Use this Product ________________________________ 3
1.
Checking the Remaining Battery of this Product ______________ 3
2. Charging the Built-in Battery of this Product _______________4
3. Charging iPod/iPhone by this Product's Built-in Battery ______ 5
4. Connecting with iPod/iPhone __________________________ 5
5.
Listening to Music in iPod/iPhone in "AMP" Mode ______________ 6
6. Synchronizing with iPod/iPhone and iTunes on Computer ____6
7. Listening to Music on Computer in "USB DAC" Mode ________ 7
8. Connecting to Other Audio Devices _____________________ 8
9. Setting Other Functions ______________________________ 8
10. Setting Gain _______________________________________9
Troubleshooting ______________________________________ 9
Specications __________________________________________ 10
Cautions on Use ________________________________________ 11
Product Support _______________________________________14
Trademarks and Registered Trademarks _____________________ 14
2
Thank you for purchasing VentureCraft product. Please read
this user's guide thoroughly before using.
Keep this document available for your future reference.
Disclaimer
● VentureCraft is not responsible for any damages caused
by natural disasters and re, actions or damages caused by
third parties, criminal or accidental use by individuals, or
any other damages caused by other irregular usage.
● VentureCraft is not responsible for any changes or losses
to recorded data, losses of commercial pro t, interruption
of business operations, or any resultant damages or losses
caused by use or malfunction of this product.
● VentureCraft is not responsible for any damages caused by
failure to follow instructions in this user's guide.
Dear Valued Customer,
Before using this product, please make sure to read
"Cautions on Use" found on the page 11 of this document.
■ Features of this Product
Go-Dap TT has certainly inherited the great features of the
successive products and is a flagship model in the Go-Dap
series. Go-Dap TT integrated the contemporary semiconductor
technology in the rich and soft tube sound and has succeeded
to eliminate thoroughly the microphonics noize, the tube's
weakest point.
Go-Dap TT is the best-suited tube headphone ampli er to play
digital audio sources in the highest quality sound.
To enjoy Go-Dap TT for many year to come, the easily-replaceable
socket-typed "Raytheon 6111 Sub MT Tube" is mounted.
● The large capacity battery (3500mAh) makes possible the
longer playback time.
● Digital audio signal is converted to S/PDIF by the (DIT built-
in)D/A converter and output from the 3.5mm round optical
digital terminal to connect with other audio devices.
Headphone
Output
SPDIF OUT
(OPT OUT)
Front end DAC
AK4353
Tube Pre
6111
Final
OP-AMP
iDevice
PC
On the model with a preheat supporting
tube substrate, when the power gets ON,
a blue LED turns on for about 5 seconds
while preheating the tube heater. This can
be seen in the heat rejection slits.
3
■ Contents of Package
● Go-Dap TT main unit
● USB cable (USB2.0 compatible[A connector - micro B
connector type])
● Customer card & Warranty（Japan only)
■
Compatible Models of iPod/iPhone and PC (OS)
● iPod：
iPod classic (160GB, 2009)/iPod nano (Sixth generation)/
iPod touch (Forth generation)
● iPhone：
iPhone 5 / 4S / 4 / 3GS
● PC（OS）
Windows：
8 / 7 / Vista / XP SP3 or later (32 bit/64 bit)
Mac
：
OS X v10.5 Leopard or later
■ How to Use this Product
Please follow operational procedures 1 to 10 below.
1.
Checking the Remaining Battery of this Product
The remaining battery can be checked by the color of the
remaining battery indicator LED located on the side panel.
The LEDs will light up in accordance with the remaining battery
when the BATTERY / BASS BOOST button is pressed lightly.
BATTERY / BASS BOOST button
Remaining
battery indicator
Remaining battery LED
Full ○ ○
Low ○
Empty O
LED color ○：Orange
CAUTION
The battery at the time of purchase is not fully charged.
Charge the battery before using this product.
4
2. Charging the Built-in Battery of this Product
Connect the USB micro B connector on the rear panel of
this product and computer or the USB charging adapter
supplied with iPod/iPhone by using the supplied USB cable.
The built-in battery is charged by setting the toggle
switch (L) on the front panel to " " or " "
mode. (Make sure the power is OFF.)
During charging, the charging status indicator LED
located on the side panel will light up.
*
When the built-in battery of this product has been fully
charged, it will automatically start charging iPod/iPhone. It
takes approximately 6 hours to fully charge this product.
*
The charging status LEDs turn off when the USB cable is
disconnected.
1
2
Charging status indicator
Charging status LED
Pre charge ○ ●
Charge ○
Complete ●
LED color ○：Orange ●：Green
CAUTION
If both LEDs are o or become o when the USB
cable is connected, immediately disconnect the
USB cable and stop charging.
Please refer to "Troubleshooting" on page 9 of
this User's Guide and reset before reuse.
USB
5
3. Charging iPod/iPhone by
this Product's Built-in Battery
Connect by inserting the Apple genuine dock cable
supplied with iPod/iPhone into the i DEVICE (USB standard
A) connector of this product.
Turn the power ON by the power switch volume knob
and set the toggle switch (L) to " " position.
iPod/iPhone will start to be charged from the built-
in battery of this product after beep or vibration that
indicates the authentication is completed. The battery
mark located at the top right of iPod/iPhone screen
will change to a charging mark .
1
2
4. Connecting with iPod/iPhone
Connect by inserting the Apple genuine dock cable supplied
with iPod/iPhone into the i DEVICE (USB standard A) connector
of this product, and set the toggle switch (R) on the front panel
to " " and the toggle switch (L) to " " mode for
headphone output/digital output.
i DEVICE
i DEVICE
6
5.
Listening to Music in iPod/iPhone in "AMP" Mode
Turn the power ON by the power switch volume knob
and set the toggle switch (L) to " " position.
Once this product and iPod/iPhone are correctly
connected (authenticated), the toggle switch LED turns
on red or green.
* If the toggle switch is blinking, iPod/iPhone may not be
connected with this product at all, or it may not be correctly
connected (authenticated).
In such case, disconnect iPod/iPhone once and recoonect,
or turn the power OFF by turning the power switchvolume
knob counterclockwise all the way until it clicks, and then
turn the power ON again.
6. Synchronizing with iPod/iPhone and
iTunes on Computer
Connect the USB micro B connector on the rear panel of
this product and your computer with the supplied USB
cable.
By setting the toggle switch (L) on the front panel to
"" mode, it enables synchronization with iTunes
on your computer. "SYNC" state is the same as if iPod/
iPhone was directly connected to your computer.
CAUTION
Do not change the switches or disconnect the
microUSB cable during synchronization.
1
1
2
2
USB
7
7. Listening to Music on Computer in
"USB DAC" Mode
Turn the power switch volume knob clockwise until it
clicks to turn the power ON.
Connect this product and computer with the supplied
USB cable. The device driver is automatically installed
when this product is connected to computer for the rst
time.
1
USB
Check the sound setting on computer and confirm a
sound is coming. For volume control, adjust the volume
on computer.
* The built-in battery will not be charged.
Set the toggle switch (L) to " " position.
3
4
5
Set the toggle switch (R) to " " position.
2
8
8. Connecting to Other Audio Devices
This product supports both digital and analog output.
■ Digital connection
This product can be connected with other audio devices
which have an OPTICAL input connector.
PHONE/
OPTICAL
9. Setting Other Functions
■ Setting volume
Adjust the power switch volume knob.
■ Setting bass boost
Use bass boost for enhancement in bass.
Press and hold the BATTERY / BASS BOOST button.
BATTERY / BASS BOOST button
The LED on the toggle switch (L) in the front panel starts
blinking.
Move the toggle switch (L) back and forth between AMP
and AMP>i/SYNC positions once.
1
2
3
9
10. Setting Gain
Gain of the headphones can be set by switching the Gain
toggle switch to either [HIGH] or [LOW].
It enables the headphones with di erent impedance to exert
its full performance and to play in high-quality sounds.
* Do not apply force to the Gain toggle switch to avoid breaking
the switch.
Troubleshooting
● In case the operation of Go-Dap TT freezes (operation
stops), reset Go-Dap TT to the factory setting by turning
the volume knob all the way counterclockwise until it
clicks, turning OFF the main power, and then turning it
back ON by turning the volume knob clockwise again.
● Reconnect iPod/iPhone and this product.
● Restart iPod/iPhone.
Gain toggle switch
［OFF］ ［ON］
①
②
10
Specications
■ Main unit
Size Width 67.80 × Depth 133.50 × Height
25.00mm (including the protrusion)
Weight 234g
■ Analog lineout
Frequency characteristic Within 20 to 20kHz±2dB
SN ratio 94dB or greater
Distortion
Distortion: 0.5% or less
Maximum output: 80mW + 80mW @32Ω
Adaptive impedance: 16Ω or higher
■ Digital lineout
Sampling frequency
PC DAC ： Input 32/44.1/48kHz 16bit
Output 32/44.1/48kHz 16bit
iDevice DAC ： Input 32/44.1/48kHz 16bit
Output 48kHz 16bit
Digital output (OPTICAL) S/PDIF
■ Inputs
USB connector
USB standard A connector (concave)
USB micro B connector (concave)
* This product supports USB 2.0.
■ Battery
Battery type Lithium ion polymer battery
Capacity 3500mAh
Charge method Via the supplied USB cable (USB2.0)
Time to full charge Approx. 6 hours
Operation time Approx. 6 hours
Sustainable charge
frequency Approx. 500 times
■ Power supply
Input 5VDC / 500mA (MicroUSB_B)
Output 5VDC / 1A (USB_A)
■ Compatible audio data format
Audio data format
AAC (16 to 320Kbps), AIFF, AAC (MP4
downloaded from iTunes Store), MP3
(16 to 320 Kbps), MP3 VBR, Audible
(formats 2-4), Apple Lossless, WAV
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