power transistor discrete configuration headphone amplifier FX-AUDIO- PH-A1J (silver)

Welcome to MJ Select. We are Japanese seller. We ship authentic items from Japan. Please enjoy shopping with peace of mind! ----------------------------------------------------------- 【About Included Manuals】 If a manual is included, it will primarily be in Japanese. We recommend using image translation apps if needed. 【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. ----------------------------------------------------------- Discrete configuration amplifier using power transistors Front-stage gain adjustment and buffer circuit using independent left and right operational amplifiers Commitment to capacitors and evolution to high quality power supply circuits Equipped with an output protection circuit using a dedicated IC, and equipped with an analog 2-system input switching function. AC adapter required (sold separately) DC12V/1A DC jack 5.5mm x 2.1mm (center positive) By setting up gain adjustment and buffering using independent left and right operational amplifiers in the front stage, and a discrete amplification circuit using power transistors in the latter stage, it achieves powerful driving force while naturally reproducing the original sound. This is a headphone amplifier that can bring out the full potential of your headphones with a maximum output power of 1200mW. Renewal to 2nd lot Positive and negative power generation is a hybrid configuration using XLSEMI's XL6019, BD139, BD140, and TPS5430 (high performance DC-DC converter with a switching frequency of 500kHz), greatly reducing ripple noise. The result is a good result that can be said to be a substantial improvement in performance. [Product features] ・Discrete configuration amplifier using power transistors ・Pre-stage gain adjustment and buffer circuit using independent left and right operational amplifiers ・Commitment to capacitors ・Evolved into a high quality power supply circuit ・Equipped with an output protection circuit using a dedicated IC ・Equipped with analog 2-channel input switching function [Notes] - Operation of the 4-pole plug (TRRS) for the 3.5mm stereo mini jack input terminal is not guaranteed. -The power supply for this product is sold separately. Please purchase an AC adapter separately. [Product specifications] Color: Silver Product warranty period: 6 months from the date of purchase Front-stage amplification/buffer circuit: Texas Instruments NE5532P operational amplifier Left and right channel independent configuration Post-stage amplifier circuit: NXP Semiconductors BD139/BD140 discrete configuration Input terminal: [LINE-IN1] 3.5mm stereo mini jack (operation is not guaranteed for 4-pole plugs) / [LINE-IN2] Stereo RCA terminal Output terminal: Standard headphone jack (Φ6.3mm TRS phone jack) Output: 115mW ~ Max 1,200mW (@16Ω) Frequency characteristics: 10Hz~30kHz THD+N (total harmonic distortion): 0.0013% SN ratio: 111.3dB Compatible impedance: 16Ω to 600Ω Power supply: DC12V power supply capacity 1A or more (AC adapter sold separately) Power connector: DC jack outer diameter 5.5mm x inner diameter 2.1mm (center plus specification) Function: Analog 2 system input switching Protection circuit: Overcurrent protection function (output protection) Accessories: Simple manual Size: Height 27mm x Width 73mm x Depth 128mm (excluding protrusions) Weight: 235g *Specifications and design may change without notice due to improvements or other reasons.