Vacuum Tube Headphone Amplifier Production Kit Using Nutube and Soldering NuTekt HA-K1 [Assembly Required]

---------------------------------------------------------------------- 【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. ----------------------------------------------------------------------

[Note] *Two AA alkaline batteries for power supply are not included. *Soldering is required for production. Headphone amplifier assembly kit using Nutube 6P1. You can create an ultra-compact, high-quality portable headphone amplifier that uses a mint can-sized case and a transparent acrylic cover. Equipped with an EDM switch inside to enjoy EDM music. It is a full kit containing parts including Nutube, board, and case. Headphone amplifier assembly kit using Nutube 6P1. You can create an ultra-compact, high-quality portable headphone amplifier that uses a mint can-sized case and a transparent acrylic cover. Equipped with an EDM switch inside to enjoy EDM music. It is a full kit containing parts including Nutube, board, and case. [Note] *2 AA alkaline batteries for power supply are not included. *Soldering is required for production. [Features] - Headphone amplifier soldering assembly kit using Nutube. ・Nutube is driven with a power supply voltage of 26 V. Enjoy authentic vacuum tube sound. - A DC/DC converter is used for the filament power supply to reduce current consumption. -Equipped with an EDM switch. Enhance the low range according to your preference, such as songs or headphones. -You can enjoy the difference in sound by adjusting Nutube's anode load resistance and changing the slope of the tube's load curve. ・Two types of operational amplifiers are included (NJM4580, MUSES01). Easy to replace using IC socket. ・The case is the size of a mint can. In addition, the power switch is protected by a power switch. Equipped with a protector and an acrylic cover that allows you to see the Nutube light. [Specifications] ・Vacuum tube: Nutube 6P1 ・Connection terminal: INPUT terminal/OUTPUT terminal (stereo mini phone jack) ・Control: Volume, EDM switch (internal) ・Output impedance: 10 Ω, recommended load: 15 Ω or more ・Power source: 2 AA alkaline batteries ・Battery life: Approximately 9 hours (when using alkaline batteries)・External dimensions (width x depth x height): 111 x 65 x 29 mm ・Weight: 110 g (excluding batteries) ・Accessories: Instruction manual ・Frequency characteristics: 20 Hz to 50 KHz (within 3 dB) ・Distortion rate: 0.15% (at -15 dBu input) ・SN: 93 dB ・Maximum output: 50 mW (when using MUSES01), 80 mW (when using NJM4580) ・EDM SW ON: +5 dB / 50 Hz ・*Measured at output load = 33Ω