LESS HD8 Single End HEADPHONE AMP

LESS HD8 Single End HEADPHONE AMP.
Portable full discrete single end amplifier
Introduce：
Less HD8 full discrete single end amplifier suitable for portable Hi-End user,design base on the sounds natural，and hi dynamic .
HD8 is base on Marantz classic HDAM circuit to modify ,increase all the transter idle current and output power，and push the circuit working on class A operation，make the output voltage more stable，
Line amp first step using Hi-End twins JFET 2SK389BL，keep the high quality preformance.
HD8 output stage using Marantz SA3 Mirror Buffer amplifier，2SB139/140 is the power output transter ，they workong on class A operation too.

HD8 single end amplifier----Specification
 
Total Harmonic              : 0.0001%(1Khz)
Signal to noise Ratio    : >128DB（Minimum）;>108DB(Maximum)
Output Power                : 165mW/600ohm；330mW/300ohm
                                       ；1000mW/100ohm；3300mW/32ohm
Fequence response     : 10Hz-25KHz(-0.5DB)
Gain                               ：15dB （HIGH）:10dB（LOW）
Charging voltage          : DC IN 5V (TYPE-C)
Battery                           : 3.7V Li-on
Battery capacity           : 5000mAh
Dimension                    ：W85XL120XH20mm
Net Weight                     : 270g
Color                              ：Magnetic Blue
Idle times                        : Around 8 hrs
 
（Full packing included：HD8*1、TYPE-C cable*1，3.5mm TO 3.5mm jumper*1，HD8 User menu*1，Warranty card*1。）