KORG Headphone Amplifier headphone amplifier with Nutube DAC and vacuum tube NuTekt HA-S Kit High-quality amplifier.

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

A high-quality portable headphone amplifier equipped with Nutube technology. The NFB (negative feedback) switch allows you to switch between a clean, clear sound and a warm, tube-like sound. Two types of operational amplifiers are included and can be easily swapped using the IC socket. A circuit diagram is also included. Output impedance: 10Ω, recommended load: 15Ω or higher Power source: 2 x AA alkaline batteries (not included) Battery life: Approximately 9 hours (when using alkaline batteries)