this preamp has four functions:
   1.It is a amplifier simulator,it could simulated three classic amp
lifier tone,including MESABOOGIE,MARSHALL,FENDER.It provides
three Gain control and three MIC position selection.It carry out 27
different tone collocation and combination.
   2.It is a DI box,it could switch the lopsided high impedance e-gu
itar signal to balanceable signal,thereby easy to connect with the
attunement station,make musical instruments record.
   3.It is a signal mixer,it could make a perfect mixture by use the
guitar signal and other input signal,then you take it as an accomp
animent.
   4.It is a “small amplifier?you just need a guitar,a earphone to
work in it,you will enjoy the perfect guitar tone.

Guitar In
Line In
Amp Selection
Gain Control
MIC Selection
GND LIFT Selection
TREBLE/BASS Control
DRIVE Control
Volume Adjust
Line Out
D.I Out
Earphone Monitor

Picture 1