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Delivery time approx. 2 months. Made to order
TSURANAGI portable amplifier was designed as a testing device for the development of Brise Audio's high-end headphone cables and high-end portable line cables (mini-mini cables) to create an ideal portable audio environment.
For the internal wiring, Brise Audio cables are used, and the electromagnetic wave absorbing shielding material and CNT (carbon nanotubes) used in our high-end cables such as MURAKUMO and YATONO are installed on the board to to further improve the sound quality.
Reviews
"The Tsuranagi reveals a fantastic sonic refinement. It elevates the music-listening experience to new heights. It amplifies not just sound but the very essence of high-fidelity portable audio, offering an immersive, accurate, and engaging sonic journey for the audiophiles willing to spend that kind of cash to explore the summit in portables."
https://www.headfonia.com/brise-audio-tsuranagi-review/2/
"It's a better amplifier for me than the Cayin C9 or the Chord Hugo 2."
"The Brise Tsuranagi is the best portable IEM amp I have ever heard. It is just incredible, and no matter what I throw at it, it’s simply breathtakingly good. I find myself excited to use it, rushing home to plug it in. Isn’t that what this hobby is all about? Being transported to another plane, being completely enveloped in your music, permanently emblazoning a smile that reaches ear to ear."
- Absolutely stunning sound
- Enhances realism, dynamics, resolution, staging, extension, positioning and timbre
- Insanely musical but neutral
- Small footprint and very light
- Brise house sound is incredible
Brise Audio TSURANAGI - Reviews | Headphone Reviews and Discussion - Head-Fi.org
Overview
- Portable amplifier with analog input and output for earphones and headphones
- Balanced input/output
- Symmetrical output for unbalanced input signals
- Pentaconn 4.4mm connection
- Input: balanced/unbalanced (5-pin 4.4mm + 3-pin 3.5mm)
- Output: balanced (5-pin 4.4 mm + 4-pin 2.5 mm)
- Equipped with high quality electronic volume IC MUSES72320
- High input impedance and high common mode interference rejection through low-noise differential line receiver
- Unbalanced-symmetrical conversion through low-noise, fully differential operational amplifier
- Low distortion current feedback amplifier for driving headphones
- Dual power supply and DC servo eliminate input and output coupling capacitors.
- Charging via USB Type C
- Continuous playback time of approx. 8 hours (depending on your environment)
Product concept
In response to the recent increase in playback devices with balanced LINE OUTs and balanced drive for headphones and earphones, Brise Audio has developed a portable amplifier with ideal balanced input/output for the development of mini-mini cables and re -Cables developed.
To enable connection to conventional playback devices, an unbalanced 3-pin 3.5mm input is also provided, which is internally converted to a high-precision balanced signal before being output.
Both 5-pin 4.4 mm and 4-pin 2.5 mm connectors are available as outputs. The design is based on low distortion and low noise, with the aim of reproducing all the information from the source.
Low performance of any of the circuits, from input to output, results in poor overall performance, so low-distortion and low-noise circuits and components are used in all signal processing circuits.
The high input impedance of 1 MΩ also minimizes distortion at the output of the upstream player.
A differential line receiver precisely converts the balanced signal into an unbalanced one to eliminate extraneous noise and ensure clean playback even in noisy outdoor areas.
The central composite amplifier of the amplifier carries out the conversion of unbalanced to balanced signals and the current amplification simultaneously.
Distortion is further reduced by incorporating a current feedback amplifier into the feedback loop of all differential operational amplifiers.
The power supply circuit uses ultra-low noise and ultra-high PSRR regulators and powers each channel independently.
A six-layer board is used to eliminate common impedance and improve signal quality in terms of layout.
As with the development of our cables, TSURANAGI pays attention to high sound performance, a wide bandwidth, no sound distortions and a low background noise.
In addition, we design our cables with the aim of minimizing the impact of the external environment and getting as much performance as possible out of the devices, both in terms of sound quality and performance.
TSURANAGI is a reference for our cable development environment, and we tried to develop an amplifier that does not affect the performance and sound quality of the cable. Cables are also designed so that they do not become bottlenecks in the system, so we want to raise the bar internally.
News & Highlights
The innovations in the amplifiers include an amplifier bandwidth of 2 Hz to 200 kHz to ensure flat reproduction in the audible range of 20 Hz to 20 kHz.
The differential DC servo amplifier detects the differential DC current of the balanced output and returns it to all differential operational amplifiers so that the offset is zero.
This reduces the DC offset of the output to +/-50 µV and allows for the elimination of coupling capacitors on the input side.The OPAMPs used in the DC servo amplifiers are also extremely powerful, low noise products to ensure that the sound quality is not compromised.
In the unlikely event that a DC offset occurs, the integrated microcontroller detects this and protects the headphones.
All power supply decoupling capacitors in the signal processing circuits use film capacitors and conductive polymer aluminum capacitors.
For sound quality, all components are carefully checked and used without regard to cost.
Uncompromising power supply
Independent power supply circuits are built in to ensure thorough separation of L-channel and R-channel and provide a margin of power supply capacity.
The switching regulator and the linear regulator alone have a current capacity that reaches up to the maximum power rating of the amplifier. In addition, the controllers are powered independently of each other, so that they can also follow a momentary current consumption.
Both power supplies are generated from the battery voltage using switching regulators, which are designed to be very low-noise thanks to a switching frequency of 2 MHz and large output capacitors for switching regulators.
The purpose of generating both power supplies is to eliminate coupling capacitors on the output side and provide low distortion operation due to the high supply voltage.
Operational amplifiers are typically operated at +/- 15V, but since the power loss is not negligible when the voltage is increased to this level, +/- 9.3V was used to extend the lifespan of the battery.
In the stage after the switching regulator, an ultra-high-performance linear regulator is provided, which thoroughly removes the remaining switching noise and ensures low-noise playback.
These linear regulators are able to remove noise down to the high frequency bandwidth, reliably eliminating even 2 MHz switching noise.
Two of the six layers are used for power, with positive and negative layers separated and a GND layer in between to avoid interference.
Like the power supply, the GND wiring is wired at one level to reduce impedance, while the signal GND and power GND not only between channels but also within channels up to are separated at the point where they intersect at a single point to ensure thorough separation.
The GND is grounded at a single point to the aluminum chassis, eliminating GND loops and suppressing external electromagnetic interference.
TSURANAGI Specification
- Unsymmetrical, Symmetrical
- Input terminal 3-pin 3.5 mm 5-pin 4.4 mm (GND connection)
- Output terminal - 5-pin 4.4 mm (GND connection) / 4-pin 2.5 mm
- Voltage gain (volume max.) 10.5 dB
- Maximum input (volume max.) 1.5 Vrms (2.1 Vpeak)
- Frequency response (-3 dB) 2 Hz - 200 kHz
- Recommended load impedance 16 Ω or more (listening required if less than 16 Ω)
- Maximum output power (16 ohms, THD+N < 0.01%) 700 mW + 700 mW
- Maximum output power (32 ohms, THD+N<0.01%) 1000 mW + 1000 mW
- Maximum output power (300 ohms, THD+N<0.01%) 100 mW + 100 mW
- "THD+N (BW=20kHz, 1Vrms output, 16ohm)" ＜ 0.005%.
- "THD+N (BW=20kHz, 1Vrms output, 300ohm)" < 0.002%.
- "THD+N (BW=20kHz, 3.4Vrms output, 300ohm)" ＜ 0.0007%.
- Crosstalk (20 Hz - 20 kHz) ＜ -100 dB
- Battery life 8 h
- Dimensions (W x H x D), without projections 80 mm x 30 mm x 120 mm
- USB Type-C charging port
- Battery capacity 7.4V 2800mAh
- Charging time < 5 h (with 5 V 2 A AC adapter)
- Weight 360 g
