【Voltage Compatibility】
When using electrical appliances, please note that they are designed for Japanese voltage specifications (90-110V), so if you use them with a different voltage, it may cause a malfunction.
【Plug Type】
Our products use Japanese plug types (A or B type).
Please use a conversion adapter if necessary.
【Important Note on Transformers and Adapters】
A transformer adjusts voltage to match your device’s requirements.
A conversion adapter only changes the plug shape and does not adjust voltage.
Using only a conversion adapter without a transformer may result in damage to the product.
【Liability】
We are not responsible for malfunctions or damages caused by improper use, such as operating the product without a transformer.
[Equipped with dual Raytheon JAN6418 vacuum tubes, 22.5V high voltage power supply full power design] Nunchaku uses two direct-heated small pentode "JAN6418" made by Raytheon, achieving stable operation while being small and low power consumption. JAN6418 uses a 22.5V anode power supply design, and the high voltage provides both stability and full performance, and the unique sound of two vacuum tubes provides a warm, smooth, analog-like vacuum tube sound. "Nunchaku" is extremely compact among AMPs equipped with vacuum tubes, but from this small body it achieves an amazingly captivating and pure vacuum tube sound.
[Manual Matching of Vacuum Tube Parts] Before using the two JAN6418 vacuum tube parts to manufacture Nunchaku, an engineer inspects and matches the two vacuum tube parts using SINAD measurements using special equipment to ensure there are no gaps. This process is entirely done manually by engineers, and the number of matches that can be completed in a day is limited to 50. This process gives Nunchaku its pure tube sound.
[Freely enjoy two types of sounds, TUBE mode (vacuum tube mode) / Class AB mode (AB class amp mode)] Nunchaku is equipped with two types of output modes: ``TUBE mode'' for vacuum tube sound, and ``Class AB mode'' that operates with an independent class AB amplifier circuit. This mode can be freely switched from the Nunchaku main menu or the dedicated app. In TUBE mode, you can enjoy a captivating, pure vacuum tube sound, and in Class AB mode, you can enjoy a powerful, modern sound with excellent resolution and dynamics, and you can freely switch between them to suit the taste of the song or device match. *When in TUBE mode, external noise may be mixed in due to vibration, electromagnetic/radio interference, etc., but this is a specification due to the characteristics of the parts.
[Unprecedented high-grade configuration, 4x TI OPAMP + 4x BUF634A] Nunchaku is equipped with a class AB amplifier circuit that uses the OPAMP + BUF structure that is also installed in players, unlike the DAC/AMP that is driven by the onboard amplifier of off-the-shelf DACs. Equipped with Texas Instruments' OPAMP x 4 + BUF634A x 4, an outstanding audio circuit has been constructed in the compact body of a small DAC/AMP. This high-grade configuration allows Nunchaku to deliver high quality sound performance in a compact design.
[4.4mm + 3.5mm connection, high output design of maximum 525mW @ 32Ω] TUBE mode, which uses Nunchaku's Raytheon JAN6418 in dual mode, achieves a high output of maximum output of 525mW + 525mW @ 32Ω. With its high sound performance and high output, you can freely combine earphones and headphones without being restricted by drive performance, even in a compact smartphone and DAC/AMP setup.
[Adopts 2x CS43198 from Cirrus Logic, which boasts high reliability] Nunchaku uses Cirrus Logic's flagship DAC "CS43198", which has a reputation for excellent resolution and noiseless, high-quality sound, in a dual configuration while minimizing the required space. The combination of Cirrus Logic's DAC, which has been used in many portable DAC/AMPs, and iBasso's unique audio circuit creates a sound that captivates many users.
[JRC Hardware Volume Control] In TUBE mode, the JRC hardware volume acts as a wedge between the DAC chip and the vacuum tube, and the DAC performs a fixed maximum output, playing the role of controlling the signal in real time while maintaining low noise and high S/N ratio.
[In-house developed FPGA + KDS crystal oscillator] ◎ In-house developed FPGA technology ◎ Improved algorithms further improve sound performance ◎ KDS femto clock crystal oscillator ◎ Reduces jitter and achieves pure, unblemished sound
[0.96-inch OLED display, status at a glance, access to internal settings] Nunchaku is equipped with a 0.96-inch OLED display and a multi-function dial that can display setting items and status, and the display and dial allow you to access and view internal settings. Furthermore, it is now possible to control, adjust, and change internal settings all at once from the Android-specific app "iBassoUAC."
[Low power consumption design of only 120mA] Although Nunchaku achieves high output, it has an excellent low power consumption design of 120mA / 5V even in TUBE mode, which requires the most power. Even in TUBE mode, the power consumption is almost the same as a general portable DAC/AMP, so you can enjoy Nunchaku's enchanting and pure vacuum tube sound for a long time without worrying.
iBasso Audio Nunchaku Portable DAC/AMP with vacuum tube
