Brise Audio TSURANAGI User manual
TSURANAGI
UM001 REV1.1
https://briseaudio.jp JULY 2021
1
Index
1. Introduction ....................................... 2
1.1 To ensure safe use of the product .................. 2
1.2 Packaged good.................................... 3
1.3 Precautions for use (※Be sure to read) ......... 3
1.4 Product Concept.................................. 5
2. How to use ......................................... 8
2.1 Names and functions of each part ................. 8
2.2 Setting the output level of the player side ..... 10
2.3 Use while charging.............................. 11
3. Trouble-shooting ................................ 12
3.1 No sound........................................ 12
3.2 Distorted sound................................. 13
3.3 Noisy sound..................................... 13
3.4 Charging LED does not light up or blinks ........ 15
4. Specifications ................................... 16
5. Disclaimer......................................... 17
6. Warranty and Contact Information .......... 18
TSURANAGI
UM001 REV1.1
https://briseaudio.jp JULY 2021
2
1. Introduction
Thank you very much for your purchase of TSURANAGI.
We hope you will read the 1.Introduction and 2.How to use before
using the product.
1.1 To ensure safe use of the product
Brise Audio's products are designed with full consideration for
safety. However, all electrical products are dangerous if used
improperly, as fire or electric shock can result in personal injury.
In order to prevent accidents, please be sure to observe the
following.
✓If it breaks down, don't use it.
✓No disassembly
✓Don’t charge or leave the battery near a fire or in the hot sun.
✓Please contact us immediately in case of any malfunction or
damage.
✓If you hear strange noises, smells, or see smoke…
→Turn off power→If the battery is being charged, disconnect
the charging cable as well.→Ask us to repair it.
TSURANAGI
UM001 REV1.1
https://briseaudio.jp JULY 2021
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1.2 Packaged good
①Amplifier
②User's manual
③USB charging cable (USB Type-A to USB Type-C)
④Product ID card
⑤Warranty card
1.3 Precautions for use (※Be sure to read)
Notes on input terminals
Don’t connect to both unbalanced and balanced inputs at the same
time. Doing so may damage the amplifier on the balanced output side
of the player, causing it to malfunction.
Notes on output terminals
Don’t use 5-pole 4.4 mm and 4-pole 2.5 mm terminals at the same
time. Failure to do so may result in overload.
The output is balanced only.Unbalanced output using the HOT side
and GND is not recommended and is not covered by the warranty, as
it may lead to failure.
TSURANAGI
UM001 REV1.1
https://briseaudio.jp JULY 2021
4
Cautions for balanced connection between player and amplifier
Be sure to connect to GND.
If you don't do the GND connection, it will lead to the failure of
the amplifier and headphones at worst.
Be sure to use a balanced mini-mini cable with a 5-wire GND
connection.
There are some devices that have 5-pole 4.4mm terminals with no
GND connection, so please check the specifications of your player
before using it. We are also in the process of checking whether or
not the players on the market have a GND connection. If you have
any questions, please contact us.
※1
With GND
※2
Without
GND
TSURANAGI
UM001 REV1.1
https://briseaudio.jp JULY 2021
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1.4 Product Concept
In recent years, in response to the increase in balanced drive of
players with balanced LINE OUT and headphones and earphones, we have
developed a portable amplifier capable of balanced input / output,
which is ideal for Brise Audio for the development of mini-mini
cables and re-cables. It also has a 3-pole 3.5mm unbalanced input
so that it can be connected to a conventional player, and it is
internally converted to a balanced signal with high accuracy and
then output.The output terminal has both a 5-pole 4.4 mm and a 4-pole
2.5 mm.The theme is to express the source information thoroughly,
and the design is based on low distortion and low noise. If the
performance of the circuit is low from the input to the output, the
performance of the whole is deteriorated, so the circuit and the
component of low distortion & low noise are adopted as all the signal
processing circuits. Due to the high input impedance of 1MΩ, the
distortion output by the player corresponding to the upstream is
also minimized. Since the balanced signal is once unbalanced and
converted with high precision by the differential line receiver to
remove external noise, clean playback is possible even outdoors with
TSURANAGI
UM001 REV1.1
https://briseaudio.jp JULY 2021
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a lot of noise. The key compound amplifier of this amplifier performs
unbalance-balance conversion and current amplification at the same
time. The distortion is further suppressed by putting the current
feedback amplifier in the feedback loop of the all-differential
operational amplifier. The power circuit is supplied independently
for each channel from the regulator of ultra-low noise & ultra-high
PSRR. A 6-layer board is used to eliminate common impedance and
improve signal quality in terms of layout.
Why did you choose the configuration to convert to unbalanced once?
Brise Audio's goal in developing a portable amplifier with ideal sound
quality was to express the source information in its entirety. To achieve
this goal, we placed the highest priority on low distortion and low noise
Differential
Line
Receiver
E-volume
MUSES72320
Fully
differential
amplifier
Current
feedback
amplifier
・Diff to Single
conversion
・Reduction
interference by
internal EMI filter
・High durability
and long life
・Minimize left and
right volume difference
・Single to Diff
conversion
・Composite amplifier
suppresses distortion
and noise
・Low output
impedance
・Current feedback
amplifier and fast
response
・容量性負荷を補償
Player Head-
phone
Low Distortion & Low Noise
Non-inverted
amplifier
・Voltage amplifier
・Suppresses the
output current of the
E-Volume and
minimizes distortion
Balanced or Unbalanced
Unbalanced
Balanced
Negative
feedback
Negative
feedback
Composite amplifier
TSURANAGI
UM001 REV1.1
https://briseaudio.jp JULY 2021
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in the circuit design. To achieve low noise, we also focused on thorough
common mode noise elimination. In order to ensure stable playback at all
times without interference from radio waves and other sources, we adopted
a configuration that eliminates common mode noise to the greatest extent
possible, as it is expected to be used outdoors. In order to achieve both
low noise and low distortion, an ultra-low distortion audio differential
line receiver with a high common mode noise rejection ratio over a wide
bandwidth was used for the common mode noise rejection circuit. We also
wanted to incorporate the MUSES72320 electronic volume, which we feel has
advantages in terms of performance and sound quality, and to overcome the
problem of different attenuation between the positive and negative side
circuits of the signal (although the error is small to begin with because
it is an electronic volume), we converted it to unbalance in the first stage
of the electronic volume. This is one of the reasons. In order to make the
most of the limited resources of portable amplifiers, the unbalanced
circuit in the middle of the amplifier is designed to have low power
consumption and a spacious mounting area.
TSURANAGI
UM001 REV1.1
https://briseaudio.jp JULY 2021
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2. How to use
2.1 Names and functions of each part
①Power switch and volume knob…The switch on the volume knob also
serves as the power switch. The microcomputer detects the position
of the volume and commands the electronic volume IC the
attenuation rate.
②Input selector…Select balanced or unbalanced input. The right
side is unbalanced and the left side is balanced.
⑨
Front
Rear
②
⑤
③
④
⑥
⑦
⑧
①
TSURANAGI
UM001 REV1.1
https://briseaudio.jp JULY 2021
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Do not input signal at the same time.
Simultaneous input may cause the player to malfunction.
③Unbalanced input…Connect a player with 3-pole 3.5 mm output.
④Balanced input…Connect a balanced output player.
⑤Balanced output 1…Connects to headphones or earphones with a
5-pole 4.4mm plug.
⑥Balanced output 2…Connects to headphones or earphones with a
4-pole 2.5 mm plug.
In order to avoid overload, do not connect ⑤& ⑥at the same time.
⑦Charge status LED…Lights up while charging. The light turns off
when charging is complete.
If it flashes, a charging error has occurred.
→For more details, please refer to 3. Troubleshooting.
⑧Battery level LED…1 Flashing (less than 25%), 1 light (25% to
50%), 2 lights (50% to 75%), and 3 lights (75% to 100%).
This function also serves as an error indication when the amplifier
is defective in some way.
→For more information, please refer to 3. Troubleshooting.
TSURANAGI
UM001 REV1.1
https://briseaudio.jp JULY 2021
10
⑨USB Type-C charging port…Charging function only, not compatible
with PD, QC, etc. It can be charged most quickly with a 5V2A charger
Mute function at power-on…Reduces pop noise when power is turned
on.It takes about 5 seconds to start up.
DC offset detection function…Shuts down the amplifier when a DC
offset is detected, protecting your headphones.
Overcurrent detection function…Shuts down the amplifier when an
overcurrent is detected.
2.2 Setting the output level of the player side
When playing with the output (gain) of the player set to high,
the output of the amplifier may be distorted beyond the allowable
limit of this product.
It is recommended to use the lowest gain setting on the player and
the volume of the amplifier in the highest position possible. This
is because players in the higher price range are often capable of
producing very high voltages relative to the voltage required by
the earphones.
TSURANAGI
UM001 REV1.1
https://briseaudio.jp JULY 2021
11
※This product does not have a gain switch. The gain is fixed at 10dB.
The configuration can handle a wide range of headphones, earphones,
and playback devices without switching the gain of the amplifier.
2.3 Use while charging
You can also use the device while it is charging. However, there
is a condition that the remaining battery charge must be less than
60% before you can use it while charging, because using it while
it is near full charge will accelerate the deterioration of the
battery. If the orange LED on the CHG is lit, the battery is being
charged. If the orange LED on the CHG is lit, the battery is being
charged. Also, the charging speed is very slow at this time, and
the power consumption of the amplifier is almost equal to the
charging power. Please turn off the power supply when you are done
using the product; if you want to charge the battery to 100%, please
do so after turning off the power supply. When the power is off,
you can start charging in any state, regardless of the remaining
power.
TSURANAGI
UM001 REV1.1
https://briseaudio.jp JULY 2021
12
3. Trouble-shooting
If the following trouble-shooting does not solve your problem,
please contact us.
3.1 No sounds
✓Increase the volume of the unit and player.
✓Make sure that the cable is firmly connected to the unit and that
it is inserted all the way in.
✓If the battery level gauge is blinking, it indicates the following
conditions.
①The remaining charge is less than 25%.
②DC offset or output overcurrent is detected.
③A defect in the charging circuit is detected.
④Detecting charging failure.
①
②
③
④
⑤
BLINK
BLINK
BLINK
BLINK
BLINK
BLINK
TSURANAGI
UM001 REV1.1
https://briseaudio.jp JULY 2021
13
⑤A defect in the power supply circuit is detected.
✓If none of the above applies, or in case of ②③④⑤, there is a
suspicion of malfunction. In case of ②, there is a possibility of
over-current due to excessive volume.
3.2 Distorted sound
✓The signal level input to the amplifier may be too high. If you
can reduce the output of the player, please set it to a lower level
and check again.
✓If the problem is improved by lowering the volume, it may be due
to over-current or the limit of the output voltage of the amplifier.
We apologize for any inconvenience this may cause, but please use
the product at a level lower than the rated value.
3.3 Noisy sound
✓If it is not connected to the player, connect it and check again.
✓Check the direction of the input selector switch.
✓Check for defective cables.
TSURANAGI
UM001 REV1.1
https://briseaudio.jp JULY 2021
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✓When using balanced input, make sure that the GND connection to
the player is made.
✓The input impedance is as high as 1MΩ, making it very sensitive
to noise when the player is not connected. Therefore, do not
disconnect the mini-mini cable with the earphones attached. It
may cause malfunction or harm to your hearing.
✓If you are connecting to a player that has a function that shuts
down the output if it is not played for a certain period of time,
the shutdown state is equivalent to disconnecting the cable. Since
the input impedance of the amplifier is very high, noise may be
heard during such a condition. If you play the player with the
volume minimized and no noise is heard, this may be the cause.
During playback, the player will come back from shutdown and the
noise will be completely gone. This is not a malfunction.
When we developed the amplifier, we confirmed the existence of
such a player.
✓The hand grip of the 4-pole 2.5mm plug is L-, and if it comes in
contact with the chassis (GND) of the amplifier during playback,
it may overload the amplifier, causing noise or a failure of the
TSURANAGI
UM001 REV1.1
https://briseaudio.jp JULY 2021
15
amplifier. If the plug diameter is too large to make contact,
please use a cable with a smaller diameter plug.
3.4 Charging LED does not light up or blinks
✓When charging the battery when the power is on, the battery must
be below 60% to prevent deterioration.
✓There is a possibility that the USB cable is disconnected. Please
try a different cable.
✓There is a possibility that the battery is faulty. Please contact
us.
✓There is a possibility that the AC adapter is defective. Please
try a different one.
✓If the battery is hot, the charging circuit will shut down. Please
allow the amps to cool down in a cool place before trying to charge.
TSURANAGI
UM001 REV1.1
https://briseaudio.jp JULY 2021
16
4. Specifications
Item Unbalanced Balanced
Input connector 3-pole 3.5 mm 5-pole 4.4 mm(with GND)
Output connector 5-pole 4.4 mm(with GND) / 4-pole2.5 mm
Voltage gain (max volume)
Max input (max volume)
Frequency response (-3dB )
Recommended load impedance
Maximum output level(16ohm, THD+N＜0.01%)
Maximum output level(32ohm, THD+N＜0.01%)
Maximum output level(300ohm, THD+N＜0.01%)
Crosstalk(20Hz - 20kHz)
Continuous standby time
Mass
Dimension (W x H x D), protruding part not included
Battery charge connector
Battery capacity
Charge time
THD+N
(BW=20kHz, 3.4Vrms output,no load)
less than 0.0007 %
10.5 dB
1.5 Vrms
2 Hz - 200 kHz
more than 16 ohm
700 mW + 700 mW
1000 mW + 1000 mW
100 mW + 100 mW
THD+N
(BW=20kHz, 1Vrms output,16ohm)
less than 0.005 %
THD+N
(BW=20kHz, 1Vrms output,300ohm)
less than 0.002 %
less than 5 h (Using a 5V 2A AC adapter)
less than -100 dB
more than 8 h
360 g
80 mm x 30 mm x 120 mm
USB Type-C
7.4 V 2800 mAh
TSURANAGI
UM001 REV1.1
https://briseaudio.jp JULY 2021
17
5. Disclaimer
The manufacturer, importer, and distributor are not responsible
for any damages, including injury or accident, resulting from
improper use and operation of this product. The information in this
document is based on the latest product specifications.
Circuit specifications, firmware, and operating instructions are
subject to change without prior notice.
6. Warranty and Contact Information
6.1 Warranty Policy
The warranty is in accordance with the enclosed warranty card.
No compensation beyond the product price will be provided.
Please understand.
TSURANAGI
UM001 REV1.1
https://briseaudio.jp JULY 2021
18
6.2 Contact Information
Brise Audio Inc.
Zip code : 370-1134
Adress : 135-5 Yorokubu, Tamamura-machi, Sawa-gun, Gunma-ken, JAPAN
TEL：050-3553-0441
Contact Us Form
https://briseaudio.jp/contact.html
Repair acceptance form
https://briseaudio.jp/Repair.html
NOTE
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